// Listing 15.6 Without function pointers

#include <iostream>
using namespace std;

void Square (int&,int&);
void Cube (int&, int&);
void Swap (int&, int &);
void GetVals(int&, int&);
void PrintVals(int, int);

int main()
{
   bool fQuit = false;
   int valOne=1, valTwo=2;
   int choice;
   while (fQuit == false)
   {
      cout << "(0)Quit (1)Change Values (2)Square (3)Cube (4)Swap: ";
      cin >> choice;
      switch (choice)
      {
        case 1:
          PrintVals(valOne, valTwo);
          GetVals(valOne, valTwo);
          PrintVals(valOne, valTwo);
          break;

        case 2:
          PrintVals(valOne, valTwo);
          Square(valOne,valTwo);
          PrintVals(valOne, valTwo);
          break;

        case 3:
          PrintVals(valOne, valTwo);
          Cube(valOne, valTwo);
          PrintVals(valOne, valTwo);
          break;

        case 4:
          PrintVals(valOne, valTwo);
          Swap(valOne, valTwo);
          PrintVals(valOne, valTwo);
          break;

       default :
          fQuit = true;
          break;
      }
   }
   return 0;
}

void PrintVals(int x, int y)
{
   cout << "x: " << x << " y: " << y << endl;
}

void Square (int & rX, int & rY)
{
   rX *= rX;
   rY *= rY;
}

void Cube (int & rX, int & rY)
{
   int tmp;

   tmp = rX;
   rX *= rX;
   rX = rX * tmp;

   tmp = rY;
   rY *= rY;
   rY = rY * tmp;
}

void Swap(int & rX, int & rY)
{
   int temp;
   temp = rX;
   rX = rY;
   rY = temp;
}

void GetVals (int & rValOne, int & rValTwo)
{
   cout << "New value for ValOne: ";
   cin >> rValOne;
   cout << "New value for ValTwo: ";
   cin >> rValTwo;
}