//	File name:	hw4.cpp
//	Author:		Whitney Keating
//	Instructor:	Dr. John Wang
//	Due date:	Wed., Sept. 26, 2007
//	Compilation:	g++ hw4.cpp -o hw4.out
//	Execution: 	./hw4.out
//
//	Goal: To output the balance of a car loan after 4  payments

#include <iostream> 
#include <iomanip>	// setprecision

using namespace std;

int main ()
{
	float bal, pmt, i;
	int k; 
	int n;
	
	cout << fixed << showpoint << setprecision(2);
	pmt = 165.25;
	i = 0.09/12.0;
	n = 36;

	// output..
	cout << "Monthly Payment:\t$" << pmt << "\n";
	cout << "Annual Interest Rate:\t" << i * 12 * 100 << "%\n";

	// computing for 1st payment
	k = 1;

	bal = pmt * ((1 - pow((1 + i),(k - n))) /  i);
	cout << "\nBalance after the " << k << " payment(s) is $" << bal 
<< "\n";
	
	k = 2; 

	bal = pmt * ((1 - pow((1 + i), (k - n))) / i); 
        cout << "Balance after the " << k << " payment(s) is $" << bal  
<< "\n";

	k = 3;
	
	bal = pmt * ((1 - pow((1 + i), (k - n))) / i);
        cout << "Balance after the " << k << " payment(s) is $" << bal
<< "\n";

	k = 4;

	bal = pmt * ((1 - pow((1 + i), (k - n))) / i);
        cout << "Balance after the " << k << " payment(s) is $" << bal
<< "\n";


	return 0;
}