undefined symbols error when using itoa on macbook pro

[boxden]

does anybody know why this piece of code is not compiling?

#include <stdio.h>
#include <stdlib.h>

int palindromic(int number);

int main() {
	int greatest = 0;
/*	for (startValue1 = 999; startValue1 >= 0; startValue1--) {
		for (startValue2 = 999; startValue2 >= 0; startValue2--) {
			if (palindromic(startValue1 * startValue2))
				greatest = startValue1 * startValue2;
		}
	} */
	int i = 1021;
	palindromic(i);
	return 0;
}

int palindromic(int number) {
	char numstr[7]; // '\0'
	itoa(number, numstr, 10);
	printf("%s\n", numstr);
	return 0;
}

the error should be located in the palindromic function

[dwks]

itoa() is a non-standard function. My gcc doesn't have it and I guess your compiler doesn't either. Instead of using it I would suggest sprintf().

int palindromic(int number) {
	char numstr[7]; // '\0'
	sprintf(numstr, "%d", number);
	printf("%s\n", numstr);
	return 0;
}

[boxden]

oh thank you very much thought it was part of stdlib..
how come i can compile atoi but can't compile itoa lol

[dwks]

Well, I don't even like atoi() because it doesn't do much error checking. strtol() does much the same thing and it's more flexible. But I agree that it's strange that atoi() made it into the standard and itoa() did not . . . .

[Adak]

Just for fun, does it work with _itoa, instead of itoa?