JPH03233714A - Date conversion processing system - Google Patents

Abstract

PURPOSE:To provide the universality to a date conversion processing system by converting an input date into an intermediate date and then an internal date based on a date input form and calculating a date to the external date based on an arithmetic formula. CONSTITUTION:This date conversion processing system consists of a date work ing means 1-1, an internal/intermediate date conversion means 1-2, and a date arithmetic means 1-3. The means 1-1 converts an input date into an internal date shown in a dominical year based on an inputted date input form and also performing the working of the intermediate date based on an inputted date output form. The means 1-2 converts properly the converted intermediate date into an internal date showing the number of days passed form January 1st in 1 A.D. in accordance with an inputted arithmetic formula and then converts this internal date into an intermediate date. Then the means 1-3 calculates a date to the internal date by an arithmetic formula. Thus it is possible to make the programs accordant with each input condition cope with various formes with no correction.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a date conversion processing method, particularly to date output formats (year/month/day output order, Western calendar/Japanese calendar) in all documents such as slips and specifications. Concerning the conversion processing method for different calendars.

[Conventional technology]

Conventionally, in this type of date conversion processing method, when changing the date output format, complicated calculations such as leap years are performed for each document, and the output format is changed.

[Problem to be solved by the invention]

The date conversion processing method described above performs troublesome calculations such as leap years for each document and changes the output format, so: 1. The number of steps in the source program becomes large and it takes time to create.

2. It is difficult to provide versatility.

3. The amount of program modification increases when there is a change in usage.

There is a drawback.

[Means to solve the problem]

The date conversion method of the present invention converts the input date into an intermediate date expressed in the Western calendar based on the input date input format,
In addition, a date processing means for processing an intermediate date based on the input date output format, and an internal processing unit that processes the converted intermediate date as the number of days from January 1, 1 AD, in a timely manner according to the input arithmetic expression. It is characterized by comprising: internal/intermediate date conversion means for converting the internal date into a date and converting the internal date into an intermediate date; and date calculation means for performing a date calculation on the internal date using the calculation formula. .

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of the present invention, in which date processing means 1-1,
Internal/intermediate date conversion means 1-2 and date calculation means 1-
Consists of 3.

As a first operation example, date change processing involving date calculation will be explained with reference to the flowchart of FIG. For example, in the ``Japanese calendar °'', from ``June 7, 1988'' to ``+
This process is performed when outputting 84 inches 10'' days later in the Western calendar.

First, input these data into date input format 2 date,
Step 2-1) Enter the calculation formula 2 as the date output format.
, date processing means 1-1 for the input date and date input format
(Step 2-2). The intermediate date is the input date with the month and day unchanged and the calendar set to the Western calendar; in this example, it is June 7, 19881.

Next, the internal/intermediate date conversion means 1-2 converts the intermediate date into an internal date (step 2-3).

Internal date means the number of days from January 1, 1 AD to an intermediate date. The date calculation means 1-3 performs a calculation (+10 in this example) on the internal date using the input formula (step 2-4), and converts the result of this calculation into the internal/intermediate date conversion means 1-2. give it to

The internal/intermediate date conversion means 1-2 converts the calculation result into an intermediate date (step 2-5), but this conversion is performed in step 2.
The conversion in -3 is an inverse conversion.

Finally, the internal/intermediate date conversion means 1-2 passes the intermediate date and date output format to the date processing means 1-1, and the date processing means 1-1 processes the intermediate date (step 2-6). Outputs 84 sun on June 17, 1988 as (
Step 2-7>.

However, in this example, since the date output format is Western calendar, step 2-6 is essentially not processed.

Next, as a second operation example, date change processing involving calculation of the number of days will be explained with reference to the flowchart in FIG.
This process is performed when you want to obtain the number of days until September 10, 1988 in the Western calendar.

First, a date input format, an arithmetic expression, and a date output format are input (Step 3-1), and the date processing means 1-1 converts the input date and date input format into an intermediate date (
Step 3-2).

Next, the internal/intermediate date conversion means 1-2 converts the intermediate date into an internal date (step 3-3). In this case, when the date output format is given in Western calendar as in this example,
Convert it to an internal date. The date calculation means 1-3 performs calculations using these internal dates and calculation formulas (step 2).
-4), outputs 96 days as the calculation result (step
yp3-5).

Finally, as a third operation example, date change processing accompanied by format change will be explained with reference to the flowchart of FIG. For example, this process is performed when you want to change "June 27, 1988" in the "Japanese calendar" to the "Western calendar".

First, the date 1 date input format 9 date output format is input (step 4-1), and the date processing means 1-1 converts the input date and date input format into an intermediate date (step 4-2).
). Next, the intermediate date is converted according to the date output format (Step 4-3), and the date of June 27, 1988 is output as a result (Step 4-4).

〔Effect of the invention〕

As explained above, by introducing intermediate dates and internal dates, the present invention can unify the processing of dates, which was previously troublesome for each individual date.
Since it can support various formats without modifying the program according to individual input conditions, it has the effect of providing versatility and maintainability.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the present invention, Fig. 2 is a flowchart of date calculation processing, Fig. 3 is a flowchart of date calculation processing,
FIG. 4 shows a flowchart of format change processing. 1-1... Date processing means, 1-2...
Internal/intermediate date conversion means, 1-3...Date calculation means.

Claims (1)

[Scope of Claims] Date processing means for converting an input date into an intermediate date expressed in a Western calendar based on an input date input format, and processing the intermediate date based on an input date output format; An internal/intermediate date converter that converts the converted intermediate date into an internal date, which is the number of days since January 1, 1st AD, in a timely manner according to the input arithmetic expression, and also converts the internal date into an intermediate date. A date conversion processing method, comprising: a date calculation unit that performs a date calculation on the internal date using the calculation formula.