C/string.h/strerror
strerror(errno)
#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)
*/
strerror: returns error message associated with the errnum
//Declaration: char *strerror(int errnum);
//Return: returns error message associated with the errnum.
#include<string.h>
#include<stdio.h>
int main(void){
printf(strerror(10));
}