#include <stdio.h>

#define FAILURE 1
#define SUCCESS 0


int main(void)
{
     FILE *fHelloFile;

     fHelloFile = fopen("hellofile.txt", "w");

     // if fopen() fails to open file, fHelloFile==NULL
     if(!fHelloFile){
          fprintf(stderr, "Error opening file\n");
          exit(FAILURE);
     }
     fprintf(fHelloFile, "Fhello, fworld! ;)\n");
     fclose(fHelloFile);
     return SUCCESS;

}