JP2011043917A - Mathematical expression display arithmetic unit and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a mathematical expression display arithmetic unit not only to display the computation sequence of a mathematical expression but also to intuitively learn it depending on a user's operation. <P>SOLUTION: By only designating a range of a part of a series of displayed mathematical expressions "2+3×4-15÷5", a preferential order of operation of mathematical expression parts "2+3", "2+3×"and "2+3×4" in the designated range is confirmed. In the case of matching the preferential order, an operation result "14" in the designated range is additionally displayed for "2+3×4". In a case of mismatching, a message "ERR" for mismatching is displayed for "2+3" and "2+3×". Accordingly, depending on a user's operation for designating an arbitrary range of a series of displayed mathematical expressions, whether the range-designated mathematical expression part matches the preferential order of operation, is known immediately, and the operation order of various mathematical expressions is intuitively learned according to the user's operation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mathematical expression display arithmetic device that displays an input mathematical expression and performs arithmetic processing on the mathematical expression, and a program thereof.

  Conventionally, a small electronic calculator generally called a calculator has been widely used.

  In this calculator, when a desired mathematical expression to be calculated is input and displayed and the execution key is operated, the solution of the input mathematical expression is immediately processed and displayed.

  For example, when “2 + 3 × 4−15 ÷ 5” is input as a desired mathematical expression and the execution key is operated, “11” as a result of calculating the mathematical expression is immediately displayed.

  However, when such a calculator is used in an educational setting where the order of priority of the four arithmetic operations is learned, the calculation result that is the solution of the mathematical expression targeted for learning is displayed immediately. It is difficult to understand whether the computations were processed in order.

  Therefore, by displaying parentheses corresponding to the priority order of the calculations for the entered formulas, even if it is difficult to understand the calculation order, it is possible to easily recognize the calculation order just by looking at the display. A mathematical expression display method that can be used is considered (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 06-231081

  When the calculation order of the mathematical expressions is displayed using the conventional mathematical expression display method, although the calculation order of the inputted mathematical expressions can be clearly known, the answer to the calculation order is displayed in short. The learning effect is not obtained.

  The present invention has been made in view of the above problems, and it is possible to provide a mathematical expression display arithmetic device and a program thereof capable of intuitively learning according to a user operation, instead of simply displaying the arithmetic order of mathematical expressions. The purpose is to provide.

  The mathematical expression display arithmetic device according to claim 1 is a display unit, a mathematical expression display control means for displaying a mathematical expression on the display section, and a partial range in the mathematical expression displayed by the mathematical expression display control means for a user operation. A formula range designating unit for designating according to the formula, and a calculation order suitability judging unit for judging whether the formula part of the range designated by the formula range designating unit is a range adapted to the priority order of computation of the formulas; Range designation calculation display control for displaying the calculation result of the formula portion together with the displayed formula when the calculation portion suitability determining means determines that the formula portion is in a range suitable for the calculation priority order of the formula. And the calculation formula suitability determination means, when it is determined that the formula part is in a range that does not match the priority order of the calculation of the formula, the fact that the formula does not match is shared with the displayed formula. It is characterized by comprising a range designation unsuitable display control means for displaying.

  The mathematical expression display arithmetic device according to claim 2 is the mathematical expression display arithmetic device according to claim 1, wherein the arithmetic result of the mathematical expression portion displayed by the range designation arithmetic display control means is designated by the mathematical expression range designation means. Further, the present invention is characterized by comprising a formula redisplay control means for causing the display section to display the formula replaced with the formula portion in the range.

  According to a third aspect of the present invention, in the mathematical expression display arithmetic device according to the first or second aspect, the range designation arithmetic display control means is configured such that the numerical expression portion is determined by the arithmetic order suitability determining means. When it is determined that the range conforms to the priority order of the calculation of the mathematical formula, the calculation result of the mathematical formula portion is displayed in association with the mathematical formula portion, and the range designation improper display control means is the calculation order suitability determination means Thus, when it is determined that the mathematical formula portion is in a range that does not conform to the priority order of the computation of the mathematical formula, the fact that the mathematical formula portion does not conform is displayed in association with the mathematical formula portion.

  According to a fourth aspect of the present invention, there is provided a mathematical expression display computing device, a display section, mathematical expression display control means for displaying a mathematical expression on the display section, and a partial range in the mathematical expression displayed by the mathematical expression display control means for a user operation. A formula range designating unit for designating according to the formula, and a calculation order suitability judging unit for judging whether the formula part of the range designated by the formula range designating unit is a range adapted to the priority order of computation of the formulas; When it is determined by the calculation order suitability determination means that the mathematical formula part is in a range that does not conform to the priority order of the computation of the mathematical formula, the range including the mathematical formula part and conforming to the priority order of the computation of the mathematical formula Forcibly setting means for forcibly setting the mathematical expression portion as a mathematical expression portion in the range designated by the mathematical expression range designating means; If it is determined that the range adapted, and a range specification operation and display control means for displaying together with the formula calculation result is the display of the mathematical expression part, comprising the.

  The program according to claim 5 is a program for controlling a computer of an arithmetic unit having a display unit, wherein the computer displays formulas on the display unit, and the formula display control unit. Formula range specifying means for specifying a part of the range in the displayed formula in accordance with a user operation, and the formula portion of the range specified by the formula range specifying means is a range adapted to the priority order of the calculation of the formula. The calculation order suitability determination means for determining whether or not the calculation order suitability determination means determines that the formula part is in a range that conforms to the priority order of the calculation of the formula. Range designation calculation display control means to be displayed together with the displayed mathematical expression, and a range in which the mathematical expression portion does not conform to the calculation priority order of the mathematical expression by the calculation order suitability determination means. If it is determined to be, it is characterized in that to function that not the compliance range specified unsuitable display control means for displaying together with the displayed formula as.

  According to the present invention, it is possible to provide a mathematical expression display arithmetic device and a program thereof that can intuitively learn according to a user operation, instead of simply displaying the arithmetic operation order of mathematical expressions.

The top view which shows the external appearance structure of the graph scientific calculator 10 which concerns on embodiment of the numerical formula display calculating apparatus of this invention. FIG. 2 is a block diagram showing a configuration of an electronic circuit of the graph scientific calculator 10. The flowchart which shows the range designation | designated calculation process (1) of 1st Embodiment by the said graph scientific calculator 10. FIG. The figure explaining the information which shows the range of the numerical formula corresponding to the priority order of the calculation of the numerical formula memorize | stored in the mathematical formula priority order evaluation area 23d of the said graph scientific calculator 10. FIG. The figure which shows the specific example (the 1) of the numerical formula display accompanying the range designation | designated calculation process (1) of 1st Embodiment of the said graph scientific calculator 10. FIG. The figure which shows the specific example (the 2) of the numerical formula display accompanying the range designation | designated calculation process (1) of 1st Embodiment of the said graph scientific calculator 10. FIG. The figure which shows the specific example (the 3) of the numerical formula display accompanying the range designation | designated calculation process (1) of 1st Embodiment of the said graph scientific calculator 10. FIG. The flowchart which shows the range designation | designated calculation process (2) of 2nd Embodiment by the said graph scientific calculator 10. FIG. The figure which shows the specific example of the numerical formula display accompanying the range designation | designated calculation process (2) of 2nd Embodiment of the said graph scientific calculator 10. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view showing an external configuration of a graph scientific calculator 10 according to an embodiment of the mathematical expression display computing device of the present invention.

  The graph scientific calculator 10 has a small size that allows a user to hold it with one hand and operate with one hand because of its portability. A key input unit 11 and a touch panel display unit 15 are provided on the front surface of the calculator 10. It is done.

  The key input unit 11 includes a number / character / arithmetic symbol key group 12 for inputting numbers, characters, arithmetic symbols and instructing execution of an operation, and a function function key group for inputting various function commands. 13. A cursor key 14 for performing a cursor / pointer moving operation or a data item selecting operation displayed on the touch panel display unit 15 is provided.

  The numeric / letter / arithmetic symbol key group 12 includes “0” to “9” (numeric) keys, “+”, “−”, “×”, “÷” (arithmetic symbols) keys, and “EXP” (exponential function). A key, a “CALC” (calculation) key, an “EXE” (execute) key, an “AC” (clear) key, and the like are arranged.

  As the function function key group 13, a “log” key, an “ln” key, a “sin” key, a “cos” key, a “tan” key, a “Graph” key, a “Draw” key, and the like are arranged.

  The touch panel display unit 15 is configured by overlaying a transparent touch panel 15t on a dot matrix type liquid crystal display unit 15d.

  The graph scientific calculator 10 specifies an arbitrary range of the displayed mathematical expression with a pointing device such as a touch pen P or a cursor pointer in accordance with the user operation in a state where the mathematical expression of the user is displayed on the touch panel display unit 15. Then, there is a function of inverting and displaying the mathematical expression portion with the range specified.

  The graph scientific calculator 10 also has a function of evaluating the priority order of the mathematical expressions displayed on the touch panel display unit 15 and storing information indicating the range of mathematical expressions corresponding to the priority order of the calculations.

  The graph scientific calculator 10 performs arithmetic processing on the mathematical expression in the designated range and displays the computation result when the range of the mathematical expression designated in the range matches (matches) the mathematical expression range corresponding to the priority order of the computation. And a function for displaying an error message when the range of the mathematical expression designated by the range does not match (match) the mathematical expression range corresponding to the priority order of the calculation.

  FIG. 2 is a block diagram showing the configuration of the electronic circuit of the graph scientific calculator 10.

  The graph scientific calculator 10 includes a control unit (CPU) 21 formed of a computer or the like.

  The control unit (CPU) 21 activates a computer control program 22a stored in advance in a storage device 22 such as a flash ROM in accordance with input data input from the key input unit 11 or the touch panel display unit 15, or A computer control program 22a stored in advance in an external storage medium (memory card or the like) 25 attached to the storage medium read / write unit 24 is read by the storage device 22 and activated, or communicated via the communication control unit 26. A computer control program 22a received from a Web server 27 (in this case, a program server) on the network N is read by the storage device 22 and started, and operation of each part of the circuit is controlled using the RAM 23 as a working storage area. It is.

  The control unit (CPU) 21 is connected to the key input unit 11, the storage device (ROM) 22, the RAM 23, the storage medium read / write unit 24, and the communication control unit 26, and further to the touch panel display unit 15. .

  The storage device 22 stores in advance a system program that controls the entire processing of the electronic circuit of the graph scientific calculator 10, and displays and calculates mathematical expressions according to inputs from the key input unit 11 or the touch panel display unit 15. Mathematical expression display / arithmetic processing program for executing processing and graph drawing processing, graph drawing program, touch position detection program for detecting position (coordinates) touched on transparent touch panel 15t of touch panel type display unit 15 Are stored as the computer control program 22a.

  In the mathematical expression display / calculation processing program, the control unit (CPU) 21 is controlled to reversely display the mathematical expression part specified by the touch panel display unit 15 as described above. A function of evaluating the order and storing information indicating the range of the mathematical formula corresponding to the priority order of the calculation, when the range of the mathematical expression specified by the range matches (matches) the range of the mathematical formula corresponding to the priority order of the computation , A function to display the calculation result of the specified range of formulas, and to display an error message when the range of formulas specified by the range does not match (match) the formula range corresponding to the priority order of the calculations Functions to be included.

  In the RAM 23, an input buffer 23a, a mathematical expression storage area 23b, a range designation buffer 23c, a mathematical expression priority order evaluation area 23d, a touch coordinate memory 23e, a calculation data memory 23f, and the like are secured.

  The input buffer 23a sequentially stores key input data such as numerical values, mathematical formulas, and various commands input by the key input unit 11.

  In the mathematical formula storage area 23b, mathematical formula data input by the key input unit 11 is stored.

  In the range designation buffer 23c, when a partial range of the mathematical formula is designated by a user operation with respect to the mathematical formula displayed on the touch panel type display unit 15, the mathematical formula portion of the designated range is stored.

  In the formula priority order evaluation area 23d, information indicating the range of formulas corresponding to the priority order of calculation of formulas displayed on the touch panel formula display unit 15 is stored (see FIG. 4).

  In the touch coordinate memory 23e, the coordinates of the touch position detected according to the touch position detection program in accordance with the touch operation on the touch panel 15t are continuously stored from the start point coordinates to the end point coordinates.

  The calculation data memory 23f sequentially stores data of calculation processes, calculation result data, and the like associated with various solution calculation processes in the graph scientific calculator 10.

  Next, the operation of the graph scientific calculator 10 having the above configuration will be described.

(First embodiment)
FIG. 3 is a flowchart showing the range specification calculation process (1) of the first embodiment by the graph scientific calculator 10.

  FIG. 4 is a diagram for explaining information indicating the range of mathematical expressions corresponding to the priority order of mathematical expressions stored in the mathematical expression priority evaluation area 23 d of the graph scientific calculator 10.

  For example, in the case of a mathematical expression “sin30 × 2 + cos30 × 2” as shown in FIG. 4A, the range of mathematical expressions corresponding to the priority order is indicated by parenthesis symbols in accordance with the evaluation of the priority order of the calculation of the mathematical formula. For each range of expressions between parentheses, the range to be preferentially calculated is (sin 30) → ((sin 30) × 2) → (cos 30) → ((cos 30) × 2) → ((sin 30 × 2) + ( cos30 × 2)).

  Also, for example, in the case of a mathematical expression “2 + 3 × 4-15 ÷ 5” as shown in FIG. 4B, according to the evaluation of the priority order of the calculation of the mathematical formula, the range of the mathematical formula corresponding to the priority order is indicated by parentheses. For each range of mathematical expressions between the parenthesis and the closing parenthesis, the range to be preferentially calculated is shown as (3 × 4) → (15 ÷ 5) → (2+ (3 × 4) − (15 ÷ 5)). .

  Note that the method for evaluating the priority order of the calculation of the mathematical formula is a conventionally known method, and thus detailed description thereof is omitted.

  FIG. 5 is a diagram showing a specific example (part 1) of the mathematical expression display associated with the range designation calculation process (1) of the graph scientific calculator 10 according to the first embodiment.

  When a mathematical expression “2 + 3 × 4-15 ÷ 5” is input in response to a user operation of the key input unit 11, the data of the input mathematical formula is stored in the mathematical formula storage area 23b (step S1), and FIG. As shown in FIG. 4, the calculation result “11” is displayed on the touch panel display unit 15 (step S <b> 2).

  If a desired range “3 × 4” on the mathematical expression is designated by a pen touch or the like in the display state of the arbitrary mathematical expression “2 + 3 × 4-15 ÷ 5”, a part “3” “× 4” is highlighted H (step S3).

  Here, when the “CALC” (calculation) key is input or it is determined that a certain time (for example, 5 sec) has elapsed (step S4 (Yes)), a part of the mathematical expression “3” specified in the range is set. “× 4” is stored in the range designation buffer 23c (step S5).

  Then, the priority order of the calculation of the formula “2 + 3 × 4-15 ÷ 5” stored in the formula storage area 23b is evaluated, and information indicating the range of the formula corresponding to the priority order of the calculation (see FIG. 4B). ) Is stored in the formula priority evaluation area 23d (step S6).

  Then, it is determined whether or not a part of the mathematical expression “3 × 4” stored in the range designation buffer 23c conforms to the mathematical expression range corresponding to the priority order of calculation stored in the mathematical expression priority order evaluation area 23d. (Step S7).

  In this case, a part of the range-specified mathematical expression “3 × 4” is included in the range enclosed in parentheses in the information (see FIG. 4B) indicating the range of the mathematical expression corresponding to the priority order of the calculation. Since they match, it is determined that they are suitable in the order of priority of operation (step S7 (Yes)).

  Then, a part “3 × 4” of the mathematical formula stored in the range designation buffer 23c is arithmetically processed (step S8), the arithmetic result “12” is stored in the arithmetic data memory 23f, and the touch panel display unit 15 is displayed with a frame surrounded by a frame at the lower right of the designated range “3 × 4” which is highlighted H (step S9).

  Thereby, the priority order of the calculation of the mathematical expression portion in the specified range is confirmed only by specifying a range of a part of the displayed series of mathematical expressions, and the calculation result is additionally displayed.

  Then, as shown in FIG. 5B, when the “EXE” (execution) key is input, the mathematical expression portion “3 × 4” of the specified range that is displayed in reverse video H is the operation result “12”. And is redisplayed on the touch panel display 15 as a partially simplified mathematical expression “2 + 12−15 ÷ 5”.

  FIG. 6 is a diagram showing a specific example (part 2) of the mathematical expression display associated with the range designation calculation process (1) of the first embodiment of the graph scientific calculator 10.

  When a mathematical expression “sin30 × 2 + cos30 × 2” is input in response to a user operation of the key input unit 11, the data of the input mathematical expression is stored in the mathematical expression storage area 23b (step S1), and FIG. As shown, the calculation result “2.732050808” is displayed on the touch panel display unit 15 (step S2).

  When a desired range “sin30” on the mathematical expression is designated by a pen touch or the like in the display state of the arbitrary mathematical expression “sin30 × 2 + cos30 × 2”, a part of the mathematical expression designated in the range “sin30” is highlighted. H (step S3).

  Here, when the “CALC” (calculation) key is input or it is determined that a certain time (for example, 5 sec) has elapsed (step S4 (Yes)), a part of the mathematical expression designated as the range “sin30”. Is stored in the range designation buffer 23c (step S5).

  Then, the priority order of the calculations of the formula “sin30 × 2 + cos30 × 2” stored in the formula storage area 23b is evaluated, and information indicating the range of the formulas corresponding to the priority order of the calculations (see FIG. 4A). And stored in the formula priority evaluation area 23d (step S6).

  Then, it is determined whether or not a part of the mathematical expression “sin30” stored in the range designation buffer 23c conforms to the mathematical expression range corresponding to the priority order of calculation stored in the mathematical expression priority order evaluation area 23d ( Step S7).

  In this case, a part of the mathematical expression designated as “sin30” matches the range enclosed in parentheses in the information (see FIG. 4A) indicating the mathematical expression range corresponding to the priority order of the calculation. Therefore, it is determined that the calculation order is suitable (step S7 (Yes)).

  Then, a part of the mathematical expression “sin30” stored in the range specifying buffer 23c is processed (step S8), and the calculation result “0.5” is stored in the calculation data memory 23f and the touch panel display unit. 15 is displayed in a box at the lower right of the designated range “sin30” which is highlighted H (step S9).

  Similarly, as shown in FIG. 6B, when a desired range “sin30 × 2” on the mathematical expression is designated by a pen touch or the like, a part of the mathematical expression designated in this range “sin30 × 2” is changed. The display is reversed (step S3).

  Then, it is determined whether or not a part of the mathematical expression “sin30 × 2” stored in the range designation buffer 23c conforms to the mathematical expression range corresponding to the priority order of computation stored in the mathematical expression priority order evaluation area 23d. (Steps S4 to S7).

  In this case as well, a part of the range-specified mathematical expression “sin30 × 2” is a range enclosed in parentheses in the information indicating the range of the mathematical expression corresponding to the priority order of the calculation (see FIG. 4A). Therefore, it is determined that they are matched in the priority order of calculation (step S7 (Yes)).

  Then, a part of the mathematical expression “sin30 × 2” stored in the range designation buffer 23c is processed (step S8), and the calculation result “1” is stored in the calculation data memory 23f and the touch panel display unit. 15 is displayed in the lower right corner of the designated range “sin30 × 2” that is highlighted H (step S9).

  Thereby, the priority order of the calculation of the mathematical expression portion in the specified range is confirmed only by specifying a range of a part of the displayed series of mathematical expressions, and the calculation result is additionally displayed.

  When the “EXE” (execution) key is input, the mathematical expression portion “sin30 × 2” of the designated range that is highlighted H is replaced with the calculation result “1”, which is partially simplified. The numerical value “1 + cos 30 × 2” is displayed again on the touch panel type display unit 15.

  FIG. 7 is a diagram showing a specific example (part 3) of the mathematical expression display associated with the range designation calculation process (1) of the first embodiment of the graph scientific calculator 10.

  Similarly to the specific example (part 1) shown in FIG. 5, as shown in FIG. 7A, the mathematical expression “2 + 3 × 4−15 ÷ 5” input in response to a user operation is converted into the calculation result “ 11 ”, when the range of the mathematical expression is sequentially designated from the top by a pen touch or the like, a part“ 2 + 3 ”of the mathematical expression designated in the range is highlighted H. (Steps S1 to S3).

  In this case, a part “2 + 3” of the range-specified mathematical expression does not match the range enclosed in parentheses in the information (see FIG. 4B) indicating the range of the mathematical expression corresponding to the priority order of the calculation. Therefore, it is determined that the calculation order does not match (steps S4 to S7 (No)).

  Then, the message “ERR” indicating that the calculation priority order is incompatible with respect to a part “2 + 3” of the range-designated mathematical expression is displayed in the lower right of the designated range “2 + 3” that is highlighted in the touch panel display unit 15. (Step S10).

  Subsequently, as shown in FIG. 7B, when a range is specified up to a part “2 + 3 ×” of the mathematical expression and displayed in reverse video H (steps S1 to S3), this case also conforms to the priority order of calculation. It is determined not to do so (steps S4 to S7 (No)), and the nonconforming message “ERR” in the calculation priority order is displayed in the same manner (step S10).

Then, as shown in FIG. 7C, when a range up to a part “2 + 3 × 4” of the mathematical expression is specified and displayed in reverse video H (steps S1 to S3), in this case, the calculation priority order is satisfied. Determined (steps S4 to S7 (Yes)),
Then, a part of the mathematical expression “2 + 3 × 4” stored in the range designation buffer 23c is arithmetically processed (step S8), and the arithmetic result “14” is stored in the arithmetic data memory 23f and the touch panel display unit. 15 is displayed with a frame surrounded by a frame at the lower right of the designated range “2 + 3 × 4” highlighted in H (step S9).

  Then, as shown in FIG. 7D, when the “EXE” (execute) key is input, the mathematical expression portion “2 + 3 × 4” of the designated range that is highlighted H is the operation result “14”. And is re-displayed on the touch panel display unit 15 as a partially simplified mathematical expression “14-15 ÷ 5”.

  Thus, just by specifying a range of a part of the series of displayed formulas, the priority order of the arithmetic part of the specified range is confirmed, and if the priority order is met, the calculation result of the specified range is In addition, a non-conforming message “ERR” is displayed when the information does not match. Therefore, in response to a user operation of designating an arbitrary range of a series of displayed mathematical formulas, it is possible to immediately know whether or not the mathematical formula portion designated by the range conforms to the priority order of calculation. The calculation order can be learned intuitively according to user operations.

(Second Embodiment)
FIG. 8 is a flowchart showing the range specification calculation process (2) of the second embodiment by the graph scientific calculator 10.

  FIG. 9 is a diagram showing a specific example of a mathematical expression display associated with the range designation calculation process (2) of the second embodiment of the graph scientific calculator 10.

  When a mathematical expression “2 + 3 × 4-15 ÷ 5” is input in response to a user operation of the key input unit 11, the data of the input mathematical formula is stored in the mathematical formula storage area 23b (step T1), and FIG. ) And the operation result “11” are displayed on the touch panel display unit 15 (step T2).

  In the display state of this arbitrary mathematical expression “2 + 3 × 4-15 ÷ 5”, when a desired range on the mathematical expression is touched and designated by, for example, the touch pen P from the head, one of the mathematical expressions designated by the range is displayed. The part “2” is displayed in reverse video H (step T3).

  Then, a part “2” of the range-designated mathematical expression is stored in the range designation buffer 23c (step T4).

  Then, the priority order of the calculation of the formula “2 + 3 × 4-15 ÷ 5” stored in the formula storage area 23b is evaluated, and information indicating the range of the formula corresponding to the priority order of the calculation (see FIG. 4B). ) Is stored in the formula priority evaluation area 23d (step T5).

  Then, it is determined whether or not a part of the mathematical formulas stored in the range designation buffer 23c conforms to the mathematical formula range corresponding to the priority order of the computations stored in the mathematical formula priority order evaluation area 23d (step T6). .

  Here, as shown in FIGS. 9A to 9B, the range of the touch position with respect to the mathematical expression “2 + 3 × 4-15 ÷ 5” being displayed on the touch panel display unit 15 is changed from “2” to “2+”. In each case, the range-designated mathematical formula portion is stored in the range designation buffer 23c, and it is determined whether or not it matches the calculation priority (steps T3 to T6).

  As shown in FIG. 9B, when “2+” is designated as the range, a part of the mathematical expression designated as “2+” is information indicating the range of the mathematical expression corresponding to the priority order of the computation (FIG. 4). (See (B)), it does not match the range enclosed in parentheses, so it is determined that it does not conform to the priority order of calculation (step T6 (No)).

  Then, based on the information (see FIG. 4B) indicating the range of the mathematical expressions corresponding to the priority order of the calculation, as shown in FIG. 9C, the range designation area includes the current designated range “2+”. Thus, the calculation priority order is compulsorily set to “2 + 3 × 4” and displayed in reverse video (step T7).

  In this case, a part “2 + 3 × 4” of the forcibly specified range expression is determined to be suitable for the calculation priority order (steps T3 to T6 (Yes)), and therefore the “CALC” (calculation) key is set. When it is input or it is determined that a certain time (for example, 5 sec) has passed (step T8 (Yes)), a part of the mathematical expression “2 + 3 × 4” stored in the range designation buffer 23c is processed. (Step T9).

  Then, the calculation result “14” is stored in the calculation data memory 23f, and is displayed in a frame at the lower right of the forced designation range “2 + 3 × 4” that is highlighted H on the touch panel display 15 (step S1). T10).

  In the case of the second embodiment, as in the case of the first embodiment, when the “EXE” (execution) key is input, the mathematical expression portion “2 + 3 × 4” of the forced designated range that is highlighted H is displayed. The calculation result “14” is replaced and re-displayed on the touch panel display 15 as a partially simplified mathematical expression “14-15 ÷ 5”.

  Thus, just by specifying a range of a part of the series of displayed formulas, the priority order of the arithmetic part of the specified range is confirmed, and if the priority order is met, the calculation result of the specified range is It is additionally displayed. On the other hand, even if it is not suitable, the range of the mathematical formula that is compulsorily set is set, and the calculation result of the set range is additionally displayed. Therefore, depending on the user's operation to specify an arbitrary range of the displayed series of formulas, whether or not the range-designated formula parts are compatible with the priority order of calculation, and which range is compatible Can be immediately known, and the calculation order of various mathematical formulas can be learned intuitively according to user operations.

  Note that the operation method by the graph scientific calculator 10 described in each of the above embodiments, that is, the range designation calculation process (1) of the first embodiment shown in the flowchart of FIG. 3, and the range of the second embodiment shown in the flowchart of FIG. Each method such as the designated calculation process (2) is a program that can be executed by a computer, such as a memory card (ROM card, RAM card, etc.), a magnetic disk (floppy disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.). Etc.) and can be distributed in an external storage medium (25) such as a semiconductor memory. The computer (21) of the electronic computer (10) reads the program stored in the external storage medium (25) into the storage device (22) (23), and the operation is controlled by the read program. Thus, it is possible to realize the function of specifying the mathematical expression range and the confirmation of the calculation priority order described in the above embodiments, and to execute the same processing by the method described above.

  The program data for realizing each of the above methods can be transmitted on a communication network (public line) N in the form of a program code, and the communication device (26) connected to the communication network N can The program data can be taken into the computer (21) of the electronic calculator (10), and the above-described function of specifying the formula range and confirming the calculation priority order can be realized.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment or some constituent elements are combined in different forms, the problems described in the column of the problem to be solved by the invention If the effects described in the column “Effects of the Invention” can be obtained, a configuration in which these constituent requirements are deleted or combined can be extracted as an invention.

DESCRIPTION OF SYMBOLS 10 ... Graph scientific calculator 11 ... Key input part 12 ... Number, character, operation symbol key group 13 ... Function function key group 14 ... Cursor key 15 ... Touch panel type display part 15d ... Dot matrix type liquid crystal display part 15t ... Transparent touch panel 21 ... CPU
22 ... Storage device 22a ... Computer control program 23 ... RAM
23a ... Input buffer 23b ... Mathematical formula storage area 23c ... Range designation buffer 23d ... Mathematical formula priority order evaluation area 23e ... Touch coordinate memory 23f ... Calculation data memory 24 ... Storage medium read / write unit 25 ... Storage medium 26 ... Communication control unit 27 ... Web server (Program server)
N ... Communication network H ... (Range specification) Inverted display P ... Touch pen

Claims (5)

A display unit;
Formula display control means for displaying formulas on the display unit;
Formula range designation means for designating a partial range in the formula displayed by the formula display control means according to a user operation;
A calculation order suitability determining means for determining whether the formula portion of the range specified by the formula range specifying means is a range that conforms to the priority order of the calculation of the formula;
Range designation calculation display control for displaying the calculation result of the formula part together with the displayed formula when the formula part is determined to be in a range adapted to the priority order of the calculation of the formula by the calculation order suitability determination means. Means,
A range designation improper display control means for displaying, when the calculation order suitability determination means determines that the formula portion is in a range that does not match the priority order of calculation of the formulas, that the formula does not match, together with the displayed formula; ,
A mathematical expression display computing device comprising:   Formula re-display control means for causing the display unit to display a mathematical formula obtained by replacing the calculation result of the formula portion displayed by the range-designated calculation display control means with the formula portion of the range designated by the formula range designation means. The mathematical expression display arithmetic device according to claim 1, wherein The range designation calculation display control means, when the calculation order suitability determination means determines that the formula part is in a range adapted to the priority order of the calculation of the formula, the calculation result of the formula part to the formula part Display them in correspondence,
The range designation improper display control means associates the fact that the mathematical expression part is incompatible with the mathematical expression part when the mathematical expression part is determined to be in a range that does not conform to the priority order of the arithmetic operation of the mathematical expression. To display,
The mathematical expression display arithmetic device according to claim 1 or 2, wherein A display unit;
Formula display control means for displaying formulas on the display unit;
Formula range designation means for designating a partial range in the formula displayed by the formula display control means according to a user operation;
A calculation order suitability determining means for determining whether the formula portion of the range specified by the formula range specifying means is a range that conforms to the priority order of the calculation of the formula;
When it is determined by the calculation order suitability determination means that the formula part is in a range that does not conform to the priority order of the calculation of the formula, the range including the formula part and that conforms to the priority order of the calculation of the formula A compulsory setting means for forcibly setting a mathematical expression part as a mathematical expression part in a range specified by the mathematical expression range specifying means;
Range designation calculation display control for displaying the calculation result of the formula portion together with the displayed formula when the formula portion is determined to be in a range adapted to the priority order of the calculation of the formula by the calculation order suitability determination means Means,
A mathematical expression display computing device comprising: A program for controlling a computer of an arithmetic unit having a display unit,
The computer,
Formula display control means for displaying formulas on the display unit,
Formula range designation means for designating a partial range in the formula displayed by the formula display control means according to a user operation,
Calculation order suitability determination means for determining whether the formula part of the range specified by the formula range specifying means is a range that conforms to the priority order of the calculation of the formula,
Range designation calculation display control for displaying the calculation result of the formula portion together with the displayed formula when the calculation portion suitability determining means determines that the formula portion is in a range suitable for the calculation priority order of the formula. means,
When the calculation order suitability determination means determines that the mathematical formula portion is in a range that does not conform to the priority order of computation of the mathematical formula, a range designation improper display control means for displaying the fact that the mathematical formula is not compatible with the displayed mathematical formula,
A computer-readable program designed to function as a computer.

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