/* Demonstration of error handling with perror() and errno. */

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

main()
{
     FILE *fp;
     char filename[80];

     printf("Enter filename: ");
     gets(filename);

     if (( fp = fopen(filename, "r")) == NULL)
     {
         perror("You goofed!");
         printf("errno = %d.", errno);
         exit(1);
     }
     else
     {
         puts("File opened for reading.");
         fclose(fp);
     }
     return(0);
}