How to stop code from infinite looping?

[mrklai]

I'm having a problem with infinite looping of my code. i am new to C++ and am writing a mortgage calculator for school assignment and my instructor is of no help. I ran across the faq/chap 15 on <iostream> and attempted to input the example within my code and receive nothing but error messages since...Can someone point out to me what I'm doing wrong PLEASE.

/*Header Section*/

#include "stdafx.h"
#include <iostream>
#include <math.h>
#include <limits>
using namespace std;

/*End Header Section*/


int _tmain(int argc, _TCHAR* argv[])
{
	double LoanAmount ;
	double InterestRate ;	
	double TermInMonths ;
	int i = 0 ;
	int Years;
	int quit = 0;
	do
	{
		// input loan amount
		while ((std::cout << "Enter Loan amount without decimals: ")
			&& (!(std::cin >> i) || i < 1 || i > 999999999)); 
	} {
			std::cout << "That's not a number between 1 and 999999999; ";
			std::cin.clear();
			std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
			
		// input interest rate
		cout << "Enter interest rate(%): (Format 5.70 for 5.70%) " ;
		cin >> InterestRate;
		// input mortgage term
		cout << "Enter terms of mortgage in years: ";
		cin >> Years;

		InterestRate = InterestRate / 100 ;
		TermInMonths = Years * 12 ;

		// monthly payment calculation formula
		double payment = LoanAmount * (( InterestRate/12)/(1-pow( 1 / ( ( 1 + InterestRate / 12 ) ) , TermInMonths ) ) );
		
		cout << "\nLoan Amount:\t$" << LoanAmount << endl;
		cout << "Interest Rate:\t" << InterestRate*100 << "%" << endl;
		cout << "Terms in Months:\t" << TermInMonths << endl;
		// display the payment amount
		cout << "Monthly Payment:\t$" <<  payment << endl;

		cout << "\n1. Enter new data" << endl;
		cout << "2. Quit" << endl;
		cout << "Select a choice: ";
		cin >> quit;
	
	while ( quit != 2 );

	return 0;
	
	}

the errors i'm receiving are as follows:

...er.cpp(25): error C2059: syntax error : '{'
...er.cpp(25): error C2143: syntax error : missing ';' before '{'
...er.cpp(59): fatal error C1075: end of file found before the left brace '{' at 'c:\users\charl es i. clay\desktop\pr g 410\er\er\er.cp p(13)' was matched
1>
1>Build FAILED.

I am completely lost as i've gone over it a million times.

[weaknessforcats]

Your do loop is oncorrectly coded:

do
{

}  while (test);

Now look at yours.

[mrklai]

Thank you for pointing that out...I guess I had been staring at it too long to see that.

[whodgson]

...and simplify the (test) of the do.......while( ) loop [l23 - l24] so that it is more easily understood.