//      File name:      mathloop.cpp
//      Author:         Benjamin Freeman
//      Instructor:     Dr. John Wang
//      Due date:       Wed., Sept. 19, 2007
//      Compilation:    g++ mathloop.cpp -o mathloop.out
//      Execution:      ./mathloop.out
//
//      Goal:   This program will let the user input two positive numbers 
//      and output their operations for addition, substraction, 
//	multiplication, and division.  

#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
	float a, b, add, sub, mult, div;
	cout << fixed << showpoint << setprecision(1);
	string star_line = "********************************";

	cout << star_line << endl;
	cout << "Input first number ( -1 to quit): ";
	cin >> a;

	while ( a > 0)
	{
		cout << "Input second number: ";
		cin >> b;
	
		add = a + b;
		sub = a - b;
		mult = a * b;
		div = a / b;

		cout << '\n';
		cout << "The results are:" << "\n\n";
		cout << '\t' << a << " + " << b << " = " << add << "\n";
		cout << '\t' << a << " - " << b << " = " << sub << "\n";
		cout << '\t' << a << " * " << b << " = " << mult << "\n";
		cout << '\t' << a << " / " << b << " = " << div << "\n\n";
	
		cout << star_line << endl;	
		cout << "Input first number ( -1 to quit): ";
	        cin >> a;
	}
	return 0;
}