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A C function that returns a string to an RPG pgm
Question:
I'm writing a C function that to retuns a string to an RPG program. The format
looks like this.
char *Func(parm)
When the data gets back to my RPG program the string is all NULLs. I can pass
the string in the arguments like this
int Func(*Stringparm, parm)
But I need the string returned not passed as an argument. Any suggestions? I'm
stumped. Doesn't take much to stump me though since I am C novice
Answer(s):
he way that is typically done in C is to pass the string pointer as an
argument and as the return value:
char* foo(char* bar)
{
strcpy(bar, "a string");
return bar;
}
C isn't like PASCAL in which the run-time will allocate a specified as
a return value -- you have to do the work yourself. This, by the way,
was also confusing to me when I first began learning C after writing
a lot of Pascal programs.
Hope this helps
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