Programming Fundamentals/Functions/COBOL

functions.cbl

*> This program asks the user for a Fahrenheit temperature, 
*> converts the given temperature to Celsius,
*> and displays the results.
*>
*> References:
*>     https://www.mathsisfun.com/temperature-conversion.html
*>     https://www.tutorialspoint.com/cobol/index.htm
*>     https://open-cobol.sourceforge.io/doc/gnucobol.html

IDENTIFICATION DIVISION.
PROGRAM-ID. FUNCTIONS.

DATA DIVISION.
WORKING-STORAGE SECTION.
01 FAHRENHEIT    PIC 999V99.
01 CELSIUS       PIC ZZ9.99.

PROCEDURE DIVISION.

MAIN.
    PERFORM GET-FAHRENHEIT.
    PERFORM CALCULATE-CELSIUS.
    PERFORM DISPLAY-RESULT.
    STOP RUN.
    
GET-FAHRENHEIT.
    DISPLAY "Enter Fahrenheit temperature:".
    ACCEPT FAHRENHEIT.

CALCULATE-CELSIUS.
    COMPUTE CELSIUS = (FAHRENHEIT - 32) * 5 / 9.

DISPLAY-RESULT.
    DISPLAY FAHRENHEIT "° Fahrenheit is " CELSIUS "° Celsius".

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functions.cbl

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