//
// Program name:  test_rationals_v2
// Author:  B. Massingill 
//
// Purpose:  test RationalNum class (version 2)
//
#include <iostream.h>
#include "rationals_v2.h"		// class definition

// -------- function prototypes --------

// precondition:
// postcondition:  functions of RationalNum class have been tested, 
//	using p and q
void testRationalNum(RationalNum p, RationalNum q);

// -------- main program --------

int main()
{
	char prompt1[] = "Enter first number, in the form m/n, "
		"or ctrl-D to end:  ";
	char prompt2[] = "Enter second number, in the form m/n:  ";

	RationalNum p;
	RationalNum q;

	cout << prompt1;
	while (cin >> p)
	{
		cout << prompt2;
		cin >> q;
		testRationalNum(p, q);
		cout << prompt1;
	}
	cout << endl;
	return 0 ;
}

// -------- function definitions --------

void testRationalNum(RationalNum p, RationalNum q)
{
	cout << "p = " << p << endl;
	cout << "q = " << q << endl;
	p.reduce();
	q.reduce();
	// test comparisons
	if (p == q)
		cout << "p == q" << endl;
	if (p < q)
		cout << "p < q" << endl;
	if (p > q)
		cout << "p > q" << endl;
	if (p <= q)
		cout << "p <= q" << endl;
	if (p >= q)
		cout << "p >= q" << endl;
	if (p != q)
		cout << "p != q" << endl;
	// test reduce
	cout << "reduced p = " << p << endl;
	cout << "reduced q = " << q << endl;
	// test arithmetic functions
	cout << "p + q = " << p + q << endl;
	cout << "p - q = " << p - q << endl;
	cout << "p * q = " << p * q << endl;
	cout << "p / q = " << p / q << endl;
	cout << "-p = " << -p << endl;
	// test in-place arithmetic
	RationalNum p_copy;
	p_copy = p;
	p_copy += q;
	cout << "after p+=q, p = " << p_copy << endl;
	p_copy = p;
	p_copy -= q;
	cout << "after p-=q, p = " << p_copy << endl;
	p_copy = p;
	p_copy *= q;
	cout << "after p*=q, p = " << p_copy << endl;
	p_copy = p;
	p_copy /= q;
	cout << "after p/=q, p = " << p_copy << endl;
	return;
}