/* fopen example */
#include <stdio.h>
int main ()
{
  int let_me_google_that_for_you = 1337;

  FILE * pFile;
  pFile = fopen ("myfile.txt","a");
  if (pFile!=NULL)
  {
    fprintf (pFile, " : [key %i]\n ", let_me_google_that_for_you);
    fclose (pFile);
  }
  return 0;
}