Thread: Why does this ouput random characters

Code:

#include <stdlib.h>	// for itoa() call
#include <stdio.h>	// for printf() call

char *convert(int value);

int main() 
{

 //print our string
 printf("%s\n", convert(123));
 getchar();
 return 0;
}

char *convert(int value)
{
	 char buf[5];
	 return itoa(value, buf, 2);
}