strerror : strerror « string.h « C Tutorial

1. C Tutorial
2. string.h
3. strerror

Print an implementation-defined error message on the screen:

#include<string.h>
#include<stdio.h>
int main(void){
  printf(strerror(10));
}

#include <stdio.h>
#include <string.h>
#include <errno.h>

int main ()
{
  FILE * pFile;
  pFile = fopen ("unexist.ent","r");
  if (pFile == NULL)
    printf ("Error opening file unexist.ent: %s\n",strerror(errno));
  return 0;
}

Error opening file unexist.ent: No such file or directory (ENOENT)