Sub routines

 Sub routines

        perform <name>

        form <name>

        endform.

-------------------------------------------------------------------------------

small example for sub routines.

        REPORT ZAJAY_SUBROUTINES1.

        data: v_a type i value 10,
             v_b type i value 20,
              v_c type i.

        PERFORM add.

        FORM add.
          v_c = v_a + V_b.
          write: 'sum is ', v_c.
        ENDFORM.

Output:

            sum is 30.

-------------------------------------------------------------------------------

Another example

        REPORT ZAJAY_SUBROUTINES1.


    data: v_a type i value 100,
          v_b type i value 20,
          v_c type i.

    PERFORM add.
    PERFORM sub.
    PERFORM mul.
    PERFORM div.

    FORM add .
          v_c = v_a + V_b.
          write: 'sum is ', v_c.
          clear v_c.
    ENDFORM.

    FORM sub .
      v_c = v_a - V_b.
      write: / 'sub is ', v_c.
      clear v_c.
    ENDFORM.

    FORM mul.
      v_c = v_a * V_b.
      write: / 'mul is ', v_c.
      clear v_c.
    ENDFORM.

    FORM div.
      v_c = v_a / V_b.
      write: / 'div is ', v_c.
      clear v_c.
    ENDFORM.

Output:

        sum is 120.

        sub is 80.

        mul is 2000.

        div is 5.

-------------------------------------------------------------------------------

Another way create 2 programs.

    REPORT ZAJAY_SUBROUTINES1.


    PERFORM add IN PROGRAM zajay_inprog.
    PERFORM sub IN PROGRAM zajay_inprog.
    PERFORM mul IN PROGRAM zajay_inprog.
    PERFORM div IN PROGRAM zajay_inprog.
---------------------------------------------------------

    REPORT ZAJAY_INPROG.
    data: v_a type i value 100,
          v_b type i value 20,
          v_c type i.

    FORM add .
      v_c = v_a + V_b.
      write: 'sum is ', v_c.
      clear v_c.
    ENDFORM.

    FORM sub .
      v_c = v_a - V_b.
      write: / 'sub is ', v_c.
      clear v_c.
    ENDFORM.

    FORM mul.
      v_c = v_a * V_b.
      write: / 'mul is ', v_c.
      clear v_c.
    ENDFORM.

    FORM div.
      v_c = v_a / V_b.
      write: / 'div is ', v_c.
      clear v_c.
    ENDFORM.

-------------------------------------------------------------------------------

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