(C) fscanf

include <stdio.h>

include <stdlib.h> /* For exit() */


int main(void)
{
  int file_inpt;
  FILE *fp;
  if((fp=fopen("filename.txt","r"))==NULL) /* This checks if the file exists */
  {
    printf("Error opening / reading file!\n");
    exit(1);
  }
  fscanf(fp,"%d",file_inpt);
  printf("%d",file_inpt);
  fclose(fp);
}