ltoa causing seg fault!

Hi, i am trying to convert a long integer to a string in hex format, here is what i have at the moment:

Code:

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Parameters *executeInstruction(Parameters *params, char memory[8192][9], long opr, long opc, char *line, int trace){

char *s;

//.....blah blah blah other boring irrelevant code here.....

s = ltoa(params->a, s, 16); //SEG FAULTS HERE

}

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Parameters is a struct i made, 'a' is a field in that struct of type long. Is there anything blindingly obvious i have missed here or is this going to be an annoying one?
thanks!

Are you sure that 'char *s' points to a valid memory location? Just declaring a function parameter an array won't actually allocate space for it.

Hmm, i've tried char s[10] instead but that gives me an incompatible types error at compile. Should i be doing calloc or malloc or something?

Ah, getting rid of the "s = " part at the beginning of the line solves this. Woohoo, thanks again!

char memory[8192][9] is an array of arrays, not an array, I hope you know that.

Its meant to be an array of strings, so a char[][] right?
Also i have another problem, under gcc in windows this compiles fine but under gcc in linux i get an error: undefined reference to 'ltoa'

any ideas?

Maybe because it is not a standard function and you have enabled ansi conformance? Or it is not in your library on Linux.

Hmm, is there a way to print to a string? like this?:

Code:

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fprintf(myChar, "%.8lX", myLong);

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that would make the conversion process a lot easier..

OH WAIT SPRINTF :D:D:D

That's what snprintf is for.