Sample Cobol Program on Mainframe Screen













Sample Cobol Program on Mainframe Screen


This program sum up the values of WS-B & WS-C data-items and store the result 
in WS-A data-item and display the all data item values to the spool.


 


COBOL compiler accepts the source code in a standard format. There are 80 
character positions on each line of source code.






Sequence Number  -> (Optional) use these positions to give sequence number 
                     to the lines of source code. 


Indicator ->   Use * for commenting the line.  Other values can be used in 
               this position are  slash(/) and hyphen(-).


Area A  &  Area B  ->   Contains COBOL source code.   ( Position 8 to 72 )


Identification ->  COBOL compiler will ignore the data in these positions.




There are four Divisions in every COBOL programs.


IDENTIFICATION DIVISION
     This division contains the information to identify the program. There are 
     seven paragraph headers in this division.  PROGRAM-ID is mandatory, rest 
     all headers are optional. 


ENVIRONMENT DIVISION
     Environment Division describe the physical characteristics of input-ouput
     data sources used by the program. The Environment Division consists of two 
     sections of which both are optional.  (Configuration Section & Input-Output 
     Section )


DATA DIVISION
     All data items used in the program must be defined in Data Division.  There 
     are 3 important sections in this divisions.  FILE SECTION, WORKING-STORAGE 
     SECTION & LINKAGE SECTION.


PROCEDURE DIVISION
     This is the place where , programmer needs to implement the program logic.