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


//By default files are fully buffered
int main(void){ 
   FILE * fp = fopen("MyFile.txt","w");
   fprintf(fp,"Important information\n");  


   int *p = NULL;
   *p = *p + 1;
   
   fclose(fp);
   return 0;
}