//SIMPLE CALCULATOR BY GELLIN 08-23-09

#include <iostream>
#include <windows.h>
#include <stdlib.h>

using namespace std;

int iResult;

int Selector = 0;//Determines what mathematics to use
int Number1 = 0;//Input Number 1
int Number2 = 0;//Input Number 2
int ivalue = 0;//Result of the Mathematics

char szChar[256];

int Add( int iNumber1, int iNumber2 )
{
	iResult = iNumber1 + iNumber2;
	return iResult;
}

int Subtract( int iNumber1, int iNumber2 )
{
	iResult = iNumber1 - iNumber2;
	return iResult;
}

int Multiply( int iNumber1, int iNumber2 )
{
	iResult = iNumber1 * iNumber2;
	return iResult;
}

int Divide( int iNumber1, int iNumber2 )
{
	iResult = iNumber1 / iNumber2;
	return iResult;
}

void GetInputNumbers()
{
	cout << "Enter 1st Number\n";
	cin >> Number1;
	cout << "Enter 2nd Number\n";
	cin >> Number2;
}

void DisplayResult()
{
	cout << "The Result Is ";
	cout << ivalue;
}

int main()
{

Redo:

	cout << "Press 1 For Addition\n"
			"Press 2 For Subtraction\n"
			"Press 3 For Multiplication\n"
			"Press 4 For Division\n";

	cin >> Selector;

	if( Selector != 0 )
		system( "cls" );

	if( Selector == 1 )
	{
		cout << "Addition Selected \n";
		GetInputNumbers();
		ivalue = Add( Number1,Number2 );
		DisplayResult();
	}

	if( Selector == 2 )
	{
		cout << "Subtraction Selected \n";
		GetInputNumbers();
		ivalue = Subtract( Number1,Number2 );
		DisplayResult();
	}

	if( Selector == 3 )
	{
		cout << "Multiplication Selected \n";
		GetInputNumbers();
		ivalue = Multiply( Number1,Number2 );
		DisplayResult();
	}

	if( Selector == 4 )
	{
		cout << "Division Selected \n";
		GetInputNumbers();
		ivalue = Divide( Number1,Number2 );
		DisplayResult();
	}

	if( Selector > 4 || Selector <= 0 )// If you Enter Higher Number Then 4 Clear the Screen And Restart
	{
		system ( "cls" );
		goto Redo;
	}

	cout << "\nWould you like to do some more Math ( Y / N )? \n";
	cin >> szChar;

	if(( strcmp(szChar, "Y") == 0 )
	|| ( strcmp(szChar, "y") == 0 ))
	{
		system ( "cls" );
		goto Redo;
	}
	else
		return 0;
}