COBOL: Read INPUT from SYSIN and store to variable

Question

I am trying to read 3 lines of input from COBOL STDIN and store them to 3 different variables. I plan on using COMPUTE on these inputs to perform a calculation.

I have been looking at TutorialsPoint (I'm teaching myself how to code COBOL), but to no avail.

Below is the code I have so far:

IDENTIFICATION DIVISION. 
PROGRAM-ID. SOLUTION. 

ENVIRONMENT DIVISION. 
INPUT-OUTPUT SECTION. 
FILE-CONTROL. 
SELECT SYSIN ASSIGN TO KEYBOARD ORGANIZATION LINE SEQUENTIAL. 

DATA DIVISION. 
    FILE SECTION. 
    FD SYSIN. 
    01 INPUT-LINE PIC X(255).
    88 EOF VALUE HIGH-VALUES.

    WORKING-STORAGE SECTION.
    01 MEAL-COST PIC 9(2)V9(2).
    01 TIP-PERCENT PIC 9(3).
    01 TAX-PERCENT PIC 9(3).

PROCEDURE DIVISION. 
    OPEN INPUT SYSIN 
    READ SYSIN
    AT END SET EOF TO TRUE 
    END-READ

    DISPLAY MEAL-COST
    DISPLAY TIP-PERCENT
    DISPLAY TAX-PERCENT

    CLOSE SYSIN.

STOP RUN.

The inputs will be of form:

12.00
5
20

And the result will be an integer (in the sense of other programming languages).

The only way I see storing the variables is to, upon each sequential iteration, have a counter and store it to each variable (MEAL-COST, TIP-PERCENT, TAX-PERCENT). However, perhaps there is an easier way to do this?

This is what I've done, but I believe there is yet a better way to get the input and store them into the correct variables. If anyone has any suggestions, that would be much appreciated.

IDENTIFICATION DIVISION. 
PROGRAM-ID. SOLUTION. 

ENVIRONMENT DIVISION. 
INPUT-OUTPUT SECTION. 
FILE-CONTROL. 
SELECT SYSIN ASSIGN TO KEYBOARD ORGANIZATION LINE SEQUENTIAL. 

DATA DIVISION. 
    FILE SECTION. 
    FD SYSIN. 
    01 INPUT-LINE PIC X(255).
    88 EOF VALUE HIGH-VALUES.

    WORKING-STORAGE SECTION.
    01 MEAL-COST PIC 9(3)V9(2).
    01 TIP-PERCENT PIC 9(3)V9(2).
    01 TAX-PERCENT PIC 9(3)V9(2).
    01 TIP PIC 9(3)V9(2).
    01 TAX PIC 9(3)V9(2).
    01 TOTAL-COST PIC 9(3)V9(2).
    01 ROUNDED-TOTAL-COST PIC 9(3).
    01 FORMATTED-RESULT PIC Z(3).

PROCEDURE DIVISION.
    OPEN INPUT SYSIN
    READ SYSIN
    AT END SET EOF TO TRUE
    NOT AT END
    MOVE INPUT-LINE TO MEAL-COST
    READ SYSIN
    AT END SET EOF TO TRUE
    NOT AT END
    MOVE INPUT-LINE TO TIP-PERCENT
    READ SYSIN
    AT END SET EOF TO TRUE
    NOT AT END
    MOVE INPUT-LINE TO TAX-PERCENT
    END-READ.

    COMPUTE TIP= (MEAL-COST * TIP-PERCENT / 100).
    COMPUTE TAX= (MEAL-COST * TAX-PERCENT / 100).

    COMPUTE TOTAL-COST= MEAL-COST + TIP + TAX.

    COMPUTE ROUNDED-TOTAL-COST ROUNDED = TOTAL-COST.

    MOVE ROUNDED-TOTAL-COST TO FORMATTED-RESULT.

    DISPLAY "The total meal cost is" FORMATTED-RESULT " dollars.". 

    CLOSE SYSIN.

STOP RUN.

Answer 1

You don't need to OPEN/CLOSE your SYSIN.

Just code:

ACCEPT MEAL-COST FROM SYSIN