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\charles i. clay\desktop\prg 410\er\er\er.cpp(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.