Example 2

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

int main(void)     // how to use printf, fscanf and fprintf

{
   int i;

   printf("Input an integer: ");

   /* read an integer from the
       standard input stream */
   if (fscanf(stdin, "%d", &i))
   {
       printf("The integer read was: %i\n", i);
   }

   else
   {
       fprintf(stderr, "Error reading an integer from stdin.\n");
       exit(1);
   }

   return 0;
}