string4.m

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

/* Based on a test case contributed by Nicola Pero.  */

#include <string.h>
#include <stdlib.h>
#include <objc/NXConstStr.h>

int main(int argc, void **args)
{
  if ([@"this is a string" length] != strlen ("this is a string"))
    abort ();
  return 0;
}