//	File Name:	numbers.cpp 
//	Author:		Christie Abbott
// 	Instructor:	Dr. John Wang
//	Due Date:	Sept. 19, 2007
// 	Compiling:	g++ numbers.cpp -o numbers.out
//	Execution:	./numbers.out
//
//	Goal:  This program will read two positive numbers and output their operations for addition, subtraction, multiplication, and division. 

#include <iostream>	
#include <iomanip>

using namespace std;

int main()
{
	// 1. var. decl.
	float a, b, add, sub, mult, div;

	cout << fixed << showpoint << setprecision(1);

	// input
	cout << "Input the first number: (-1 to quit): ";
	cin >> a;
	
	while( a > 0)
	{
		cout << "Input the second number: ";
		cin >> b;

		// computing
		add = a + b;
		sub = a - b;
		mult = a * b;
		div = a / b;
	
		// out
		cout << "The sum of the two numbers is: " << add << '\n';
		cout << "The difference of the two numbers is: " << sub << '\n';
		cout << "The multiplication of the two numbers is: " << mult << '\n';
		cout << "The division of the two numbers is: " << div << endl;
		
		cout << "Input the first number: (-1 to quit): ";
	        cin >> a;

        }
	
	return 0;
}