#include <stdio.h>
#include <stdlib.h>
int main()
{
   char ch, filename[25];
   FILE *fp;

   printf("Enter file name\n");
   gets(filename);

   fp = fopen(filename, "r"); // read mode

   if (fp == NULL)
   {
      printf("Error while opening file.\n");
      exit(1);
   }

   printf("The contents of file\n", filename);

   while((ch = fgetc(fp)) != EOF)
      printf("%c", ch);

   fclose(fp);
   return 0;
}