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Parameter of subroutine, return value

 You can set a subroutine with parameters. The parameter values are activated by the main routine

using the 'VAR' command. The command 'RETURN' ends the subroutine's program and commences

the main routines next step.

 If the value combines with a local variable, some tasks can share the subroutine.

10 GOSUB *SUB 1 2 3 /* send parameter values

20 END

30 *SUB /* A!,B!,C! (with !) are local variables.

40 _VAR A! B! C! /* get parameter values in the subroutine.

50 PRINT A! B! C!

60 RETURN

10 GOSUB *SUB

20 _RET_VAL A /* get return value from the subroutine

30 PRINT A

40 END

50 *SUB

60 C!=123

70 RETURN C! /* C! = return value

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Accell MPC-68K Series Manuale Utente Pagina 15