Toshiba STE 58762 － 2-23 －, Program Subexample M1, M2, M3, Program Main Remark *** Sample

STE 58762

When calling the subprogram from the main program, write (in the main program) the name of the subprogram and the data you wish to pass over to that subprogram. For example, the corresponding subprogram will have the statement:

PROGRAM SUBEXAMPLE (M1, M2, M3)

The subprogram SUBEXAMPLE will now do whatever it does while treating A as M1, B as M2, and C as M3.

Note that variables changed in the subprogram will automatically change the corresponding value in the main program. For example, if M3 were to change in the subprogram SUBEXAMPLE, C will also change simultaneously in the main program.

Example:

Main program

PROGRAM MAIN

REMARK *** SAMPLE 2 ***

K1 = 15

K2 = 28

SUB2(K1, K2, K)

PRINT K

END

Sub program

PROGRAM SUB2(N1, N2, N3)

REMARK *** SUBPROGRAM NO. 2 ****

N3 = N1 + N2

RETURN

END

In the above example, three arguments are being passed off between the main program and subprogram. Specifically, K1 of the main program is passed over as N1 of the subprogram. Similarly, K2 of the main program is passed over as N2 of the subprogram. The subprogram adds N1 and N2, and puts the result in a variable called N3. When this happens, the value of K in the main program also changes (since K and N3 correspond to each other).

－ 2-23 －