// Listing 14.7 demonstrates use of an array of pointers to functions

#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()
{
	int valOne = 1;
	int valTwo = 2;
	int choice = 0;
	int i = 0;
	const int MAX_ARRAY = 5;
	void (*pFuncArray[MAX_ARRAY])(int &, int &);

	for (i = 0; i < MAX_ARRAY; i++)
	{
		cout << "(1)Change Values (2)square (3)cube (4)swap:";
		cin >> choice;
		
		switch (choice)
		{
		case 1:
			pFuncArray[i] = getVals; 
			break;
		case 2:
			pFuncArray[i] = square; 
			break;
		case 3:
			pFuncArray[i] = cube; 
			break;
		case 4:
			pFuncArray[i] = swap; 
			break;
		default:
			pFuncArray[i] = 0;
		}
	}

	for (i = 0; i < MAX_ARRAY; i++)
	{
		pFuncArray[i](valOne, valTwo);
		printVals(valOne, valTwo);
	}
	
	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;
}