#include <iostream>
#include <iomanip>
using namespace std;

#include "utility.h"

int main()
{
   cout << fixed;   // show fixed decimal
   
   cout << "Testing the double swap." << endl;
   double d1 = 0.4563245792;
   double d2 = 0.4563245791;
   cout << "Before swap -- d1 = " << d1 << " and d2 = " << d2 << endl;
   swap(d1,d2);
   cout << "After swap -- d1 = " << d1 << " and d2 = " << d2 << endl;
   cout << endl;

   cout << "Testing the floating point equality" << endl;
   cout << "Using the == operator : they are the ";
   if (d1-d2 == 0.0000000001) cout << "Same"; else cout << "Different";
   cout << endl;
   cout << "Using the dEqual function : they are the ";
   if (dEqual(d1-d2,0.0000000001)) cout << "Same"; else cout << "Different";
   cout << endl << endl;

   cout << "Testing the round function." << endl;
   cout << d1 << " rounded to two decimals is " << round(d1,2) << endl;
   cout << d2 << " rounded to three decimals is " << round(d2,3) << endl;
   cout << endl;
   
   cout << setprecision(5); //show 5 decimals
   cout << "Testing the floating swap." << endl;
   float f1 = 0.45632;
   float f2 = 0.32415;
   cout << "Before swap -- f1 = " << f1 << " and f2 = " << f2 << endl;
   swap(f1,f2);
   cout << "After swap -- f1 = " << f1 << " and f2 = " << f2 << endl;
   cout << endl;
   
   cout << "Testing the integer swap." << endl;
   int i = 34;
   int j = -78;
   
   cout << "Before swap -- i = " << i << " and j = " << j << endl;
   swap(i,j);
   cout << "After swap -- i= " << i << " and j = " << j << endl;
   cout << endl;
   
   return 0;
}