// file: time/example.cc
//
//

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

// main program
//
int main(int argc, char** argv) {

  // start a timer
  //
  time_t start_time = time(NULL);
  fprintf(stdout, "start time = %d\n", start_time);
  sleep(3);
  time_t end_time = time(NULL);
  fprintf(stdout, "end time = %d (%d)\n", end_time, end_time - start_time);

  clock_t start, end;
  double cpu_time_used;
  start = clock();
  fprintf(stdout, "start time = %d\n", start);
  for (long i = 0; i < atoi(argv[1]); i++) {
    for (long j = 0; j < atoi(argv[2]); j++) {
      float sum = sin(M_PI * (i+j));
    }
  }
  end = clock();
  fprintf(stdout, "end time = %d (%d)\n", end, end - start);
  cpu_time_used = ((double) (end - start)) / CLOCKS_PER_SEC;
  fprintf(stdout, "cpu time used = %10.4f\n", cpu_time_used);
}