// file: lecture_10/example.cc
//

// local include files
//
#include "example.h"

// method: main
//
// main program starts here
//
int main(int argc, char** argv) {

  // declare an array
  //
  char buf[999];

  // opens a file
  //
  FILE* fp = fopen(argv[1], "r");
  if (fp == (FILE*)NULL) {
    fprintf(stdout, "*> an error has occurred (%s)\n", argv[1]);
  }

  // loop over the file and read every line until we hit an EOF
  //
  char* ptr = fgets(buf, 999, fp);
  while (ptr != (char*)NULL) {
    fprintf(stdout, "1: buf = %s", buf);
    ptr = fgets(buf, 999, fp);
  }

  // rewind the file
  //
  rewind(fp);
  
  // loop over the file and read every line until we hit an EOF
  //
  while (fgets(buf, 999, fp)) {
    fprintf(stdout, "2: buf = %s", buf);
  }
    
  // close the file
  //
  fclose(fp);

  // call a function
  //
  if (my_function((long)1, (long)2)) {
    fprintf(stdout, "my_function worked!!!!\n");
  }
  else {
    fprintf(stdout, "my_function did not work :(\n");
  }
  
  // exit gracefully
  //
  exit(0);
}