Returning string from a function (fairly urgent =) ) 1

[PetitPal]

OK, I know I'm probably going mad BUT this project is driving me mad now, so...

- to return a string from a function you need to use a pointer?

- this code (as an example) should work...?


void change_it(char *my_string) {
*my_string = "hello\0";
return;
}

void main (void) {
char sMyString[10] = "test\0";
char *pMyString = &sMyString;

change_it(pMyString);
}


Am I right in thinking that this would change the value of sMyString to 'hello' in the main routine, via the pointer pMyString?

If not, could anyone please provide an example? Thanks and sorry for asking but I'm trying to write code for devices which have v. small stacks (<16K) and I'm not sure if it's my code that's wrong or just the fact that the pointers aren't working because of the size / style of the stack.

Thanks!

PetitPal.

 

[Zyrenthian]

you can NOT set strings = to constant strings as you are doing.

First you need to make sure the string you are passing has enough memory allocated for the lenght of the new string and 2, you need to use sprintf, strcpy, or various other methods depending on platform

so your function above would now look like

strcpy(my_string,&quot;Hello&quot;



Matt

 

[PetitPal]

*doh* - I knew I was going mad (too my languages and too long staring at the screen!); anyway - it works now so thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you, thank-you (etc)

=)

PetitPal

 

[Zyrenthian]

LOL glad to help

matt