Can anyone explain me CALL procedure in COBOL.Does it
carries similarities like call by reference in C.
Answer / sravani
CALL statement is used to whenever if we want to call any subprograms in the main program.
The call can be a dynamic call or static call.
In static call the subprogram is compiled alone with the main program where as in dynamic call the calling program and called program will be compiled separately.
If there were any changes in the subprogram then main program also needs to be recompiled in case of static call its not required in dynamic call.
For static call NODYNAM is choosen and for dynamic call DYNAM is choosen. For static call the program name is passed directly for dynamic call the program name is declared in working storage section and it will be called using the working storage variable.
Various ways of calling the subprograms using call statement
CALL WS_PGM using by reference using identifier-1, identifier-2.
CALL WS-PGM using by content using identifier-1, identifier-2.
CALL WS-PGM using by value using identifier-1, identifier-2.
CALL WS-PGM.
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