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

#include "utility.h"

int main()
{
   srand(time(0));   
   cout << fixed << setprecision(3); //show 3 decimals
   
   cout << "Testing the rand and prime functions" << endl;
   for (int i = 0; i < 10; i++) {
      int a = rand(245);
      int b = rand(1034, 23476);
      cout << setw(10) << a << "   ";
      if (prime(a)) cout << "prime"; else cout << "     ";
      cout << setw(10) << b << "   ";
      if (prime(b)) cout << "prime"; else cout << "     ";
      cout << endl;
   }
   cout << endl;
   
   cout << "Testing the distance function." << endl;
   cout << "The distance from (0,0) to (3,4) is " << distance (0,0,3,4) << endl;
   cout << "The distance from (1.1,2.2) to (-1.1, -2.2) is "
	<< distance(1.1,2.2,-1.1,-2.2) << endl;
   cout << endl;

   cout << "Using the PI constant" << endl;
   cout << "The area of a circle with radius 7 is " << PI * 7 * 7 << endl;
   cout << endl;
   
   return 0;
}