I have an assignment to create a mortgage calculator in C++. I have attempted to complete this but I cannot get it to compile. Any help would be appreciated. Here is what I have come up with:

#include <stdio.h>
#include <math.h>
using namespace std;
 
 
		/* Begin program */
	int main() {		
		double loanAmount = 200000;		
		double loanBalance;
		int i = 0;
		int [] term = {7,15,30};
		double rate = {.0535, .0550, .0575};
		double monthlyPayment = (loanAmount*(rate[i]/12))/(1-(Math.pow(1/(1+(rate[i]/12)),(term[i]*12))));
 
	for (i = 0; i < term.length; i++) {		
		NumberFormat cformat = NumberFormat.getCurrencyInstance();	/* Format numbers to currency */
		cformat.setMinimumFractionDigits(2);
		NumberFormat pformat = NumberFormat.getPercentInstance();	/* Format numbers to percents */
		pformat.setMinimumFractionDigits(2);
		System.out.println("The initial loan amount is " + cformat.format(loanAmount));
		System.out.println("and the length of the term is " + term[i] + " years");
		System.out.println("and the monthly interest rate is " + pformat.format(rate[i]));
		/* This is the calculation for the monthly mortgage payment */
		System.out.println("The monthly payment for this loan will be " + cformat.format(monthlyPayment));
	}	
 
	System.out.println("This program will calculate the monthly interest paid, principle paid, and ");
	System.out.println("loan balance for the selected loan.");
	System.out.println("Please choose one of the terms listed below");
	System.out.println("1: 7 years at 5.35% interest");
	System.out.println("2: 15 years at 5.5% interest");
	System.out.println("3: 30 years at 5.75% interest");		

	/* User menu display */
 
	int myInteger = readInteger("Please enter the number of your choice.");  

	/* User input */
 
	switch(myInteger) {		
		case 1:  {			
			loanBalance = loanAmount;
			int displayMonth = 1;
			int displayLoop = 0;
			while (displayMonth <= (term[0]*12))
			{
				double interestPayment = loanBalance*rate[0];
				double principlePayment = monthlyPayment-interestPayment;
				loanBalance = (loanBalance-principlePayment);
 
			NumberFormat cformat = NumberFormat.getCurrencyInstance();
			cformat.setMinimumFractionDigits(2);
			System.out.println("For Month " + displayMonth + ":");
			System.out.println("Interest paid is " + cformat.format(interestPayment));
			System.out.println("Principle applied is " + cformat.format(principlePayment));
			System.out.println("The new loan balance is " + cformat.format(loanBalance));
			displayMonth++;
			displayLoop++;
 
			/*This is where the scroll begins*/		

			if (displayLoop == 3)
				{
					System.out.println("Press Enter to scroll down...");
					String output = readLine();
					displayLoop = 0;
					}
				}
			break;
			}
 
		case 2:  {
			loanBalance = loanAmount;
			int displayMonth = 1;
			int displayLoop = 0;
			while (displayMonth <= (term[1]*12))
			{
				double interestPayment = loanBalance*rate[1];
				double principlePayment = monthlyPayment-interestPayment;
				loanBalance = (loanBalance-principlePayment);
 
			NumberFormat cformat = NumberFormat.getCurrencyInstance();
			cformat.setMinimumFractionDigits(2);
			System.out.println("For Month " + displayMonth + ":");
			System.out.println("Interest paid is " + cformat.format(interestPayment));
			System.out.println("Principle applied is " + cformat.format(principlePayment));
			System.out.println("The new loan balance is " + cformat.format(loanBalance));
			displayMonth++;
			displayLoop++;
 
			if (displayLoop == 3)
				{
					System.out.println("Press Enter to scroll down...");
					String output = readLine();
					displayLoop = 0;
					}
				}
			break;
			}
 
		case 3:  {
			loanBalance = loanAmount;
			int displayMonth = 1;
			int displayLoop = 0;
			while (displayMonth <= (term[2]*12))
			{
				double interestPayment = loanBalance*rate[2];
				double principlePayment = monthlyPayment-interestPayment;
				loanBalance = (loanBalance-principlePayment);
 
			NumberFormat cformat = NumberFormat.getCurrencyInstance();
			cformat.setMinimumFractionDigits(2);
			System.out.println("For Month " + displayMonth + ":");
			System.out.println("Interest paid is " + cformat.format(interestPayment));
			System.out.println("Principle applied is " + cformat.format(principlePayment));
			System.out.println("The new loan balance is " + cformat.format(loanBalance));
			displayMonth++;
			displayLoop++;
 
			if (displayLoop == 3)
				{
					System.out.println("Press Enter to scroll down...");
					String output = readLine();
					displayLoop = 0;
					}
				}
			break;
			}
 
		default:  {
			System.out.println("Invalid Entry. Please try again.");
				}
			}
		}
 
public static String readLine()
 
	{
		int character;
		String response = "";
		boolean StringDone = false;
 
		while (!StringDone)
		{
			try
			{
				character = System.in.read();
 
				if(character < 0 || (char)character == '\n')
					StringDone = true;
				else response = response + (char)character;
			}
				catch(java.io.IOException e)
				{
					StringDone = true;
			}
		}
			return response;
	}
 
public static int readInteger(String userprompt)
 
	{
		while(true)
 
		{
			System.out.print(userprompt + " ");
			try
			{
				return Integer.valueOf(readLine().trim()).intValue();
				}
				catch(NumberFormatException e)
				{
					System.out.println("Invalid entry.");
					}
				}
			}
		}

sorry for the formatting errors. it didn't look like that before i copied it.

[moderator edit: That's because you're supposed to use code tags]

>I have attempted to complete this but I cannot get it to compile.
Probably because the code is some weird bastardization of C++ and Java.

>I have attempted to complete this but I cannot get it to compile.
Probably because the code is some weird bastardization of C++ and Java.

I appreciate your attempt. That is why my name is clueless. I took a Java class not too long ago so that is probably why the language is confused.

>so that is probably why the language is confused.
Confused is an understatement. ;) On a second glance, it's a combination of C, C++, and Java. I would recommend a good book on C++ (Accelerated C++ by Koenig and Moo), and that you try to use concepts from Java but forget about the syntax until you're in a better position to differentiate the two languages.

This article has been dead for over six months. Start a new discussion instead.