// file: lecture_16/example.cc
//

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

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

  // execute a simple function
  //
  /*
  float val1 = 27.0;
  float val2 = 3.0;
  float sum = 0.0;
  fprintf(stdout, "BEFORE: the sum off %f and %f = %f\n", val1, val2, sum);
  sum = mysum(val1, val2);
  fprintf(stdout, "AFTER: the sum off %f and %f = %f\n", val1, val2, sum);

  float val1 = atof(argv[1]);
  float val2 = atof(argv[2]);
  if (isequal(val1, val2) == true) {
    fprintf(stdout, "EQUAL: %f = %f\n", val1, val2);
  }
  else {
    fprintf(stdout, "NOT EQUAL: %f != %f\n", val1, val2);
  }
  */

  // call mysum again
  //
  float val1 = atof(argv[1]);
  float val2 = atof(argv[2]);  
  long lval1 = atoi(argv[1]);
  long lval2 = atoi(argv[2]);
  fprintf(stdout, "FLOAT: %f = %f + %f\n", mysum(val1, val2), val1, val2);
  fprintf(stdout, "LONG:  %f = %d + %d\n", mysum(lval1, lval2), lval1, lval2);
  fprintf(stdout, "????:  %f = %d + %d\n", mysum((long)val1, lval2),
	  lval1, lval2);

  double dval1 = atof(argv[1]);
  double dval2 = atof(argv[2]);
  fprintf(stdout, "DOUBLE: %f = %f + %f\n",
	  mysum((float)dval1, (float)dval2), dval1, dval2);

  //  double sum = (double)lval1 + (double)val2;
  //double sum = (double)(float)((float)lval1 + (float)val2);
  
  // order of operations
  //
  float x1 = 27.999;
  long x2 = 3;
  char c = 'a';
  
  float sum = x1 + (float)x2 + (float)(long)c;
  fprintf(stdout, "sum (%f) = %f + %d + %c (%d)\n", sum, x1, x2, c, c);

  // mixed expresssions
  //
  x1 = 2.1;
  long j = x1 + 3;
  fprintf(stdout, "what is j = %d\n", j);
  /*
  sum = x1 * ((float)x2 + (float)c);
  fprintf(stdout, "sum (%f) = %f * %d + %c (%d)\n", sum, x1, x2, c, c);

  // function calls
  //
  //  float sum = mysum(1.0, (float)2.0);
  float sum2 = pow(2.0, 3.0);
  //  fprintf(stdout, "%s: my sum = %f\n", argv[0], sum);

  if (mysum(1.0, 1.2727) == (double)2.2727) {
    fprintf(stdout, "hello joe\n");
  }

  if ((long)my_truncate(1.252525) == long(1)) {
    fprintf(stdout, "hello joe2\n");
  }
  */

  // exit gracefully
  //
  return(0);
}