package ProgrammingExercise4_21;

/* (Financial application: comparing loans with various interest rates) Write a program
 * that lets the user enter the loan amount and loan period in number of years
 * and displays the monthly and total payments for each interest rate starting from
 * 5% to 8%, with an increment of 1/8. Suppose you enter the loan amount 10,000
 * for five years; display a table as follows: page 135.
 */

public class CompareLoans {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		final double LOAN_AMOUNT = 10000;
		final int NUMBER_OF_YEARS = 5;
		double interestRate = 5.0;
		
		System.out.println("Loan Amount: " + LOAN_AMOUNT);
		System.out.println("Number of Years: " + NUMBER_OF_YEARS);
		System.out.println("Interest Rate\tMonthly Payment\tTotal Payment");
		
		for(; interestRate <= 8.0; interestRate = interestRate + (1.0/8.0)) {
			System.out.print(interestRate + "%\t");
			
			double tempLoanAmount = LOAN_AMOUNT;
			double totalPayment = 0;
			
			for(int monthsLeft = NUMBER_OF_YEARS*12; monthsLeft > 0; monthsLeft--) {
				double payment = tempLoanAmount / monthsLeft;
				totalPayment += payment;
				tempLoanAmount -= payment;
				
				if((monthsLeft != NUMBER_OF_YEARS*12) && (monthsLeft % 12 == 0)) {
					tempLoanAmount = tempLoanAmount + (tempLoanAmount * (interestRate / 100));
				}
				
			}
			
			double monthlyPayment = totalPayment / (NUMBER_OF_YEARS*12);
			System.out.printf("%14.2f\t%16.2f\n", monthlyPayment, totalPayment);
		}
	}

}

#include <iostream>#include <cmath>using namespace std;int main(){	double principle = 10000;	double Rate = 5;	double numyears = 5;	double iRate, num, exp, base, denom, payments, time, total;	// convert apr	iRate = Rate / 100;	// convert time	time = numyears * 12;	//figure top	num = iRate * principle / 12;	// figure the exponent portion	exp = -1 * 12 * (time / 12);	// figure a base	base = iRate / 12 + 1.0;	// complete the denominator	denom = 1.0 - pow(base, exp);	// figure payments	payments = num/denom;	// total loan	total = payments * time;	cout.precision(8);	cout << "Interest Rate\t" << "Monthly Payments\t" << "Total Loan" << endl;	cout << Rate << "%\t\t" << payments << "\t\t" << total << endl;	return 0;}