// file: my first program
//
#include <stdio.h>
#include <math.h>
#include <string.h>

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

  fprintf(stdout, "argv[1] = %s\n", argv[1]);

  long N=5;
  float x[N];
  x[0] = 27.0;
  x[1] = 27.27;
  x[2] = -27.27;
  x[3] = -27.0;
  x[4] = -1.0;
    
  for(long i=0; i<N; i++) {
    fprintf(stdout, "%d: %f\n", i, x[i]);
  }

  char joe[] = "1234";
  char mary[] = "5678";

  char* pptr[2];
  pptr[0] = joe;
  pptr[1] = mary;

  fprintf(stdout, "joe: %s <==> mary: %s\n", pptr[0], pptr[1]);
  
  // exit gracefully
  //
  return 0;
}