C++貸款計算器

我正在嘗試在C++中編寫一個程序，該程序需要啓動貸款餘額，年利率和每月付款，並打印一份時間表，顯示每個月之後餘額將在貸款之前已付清或直至60個月已過。C++貸款計算器

//Calculates a loan payment schedule 

#include <iostream> 
#include <iomanip> 
#include <cmath> 

using namespace std; 

int main() 
{ 

double startingBalance = 0.0; 
double interestRate = 0.0; 
double monthlyPayment = 0.0; 
double monthlyBalance = 0.0; 
double compountInterest = 0.0; 
double balance = 0.0; 
int month = 0; 

cout << fixed << showpoint; 
cout << setprecision(2); 

cout << "Starting loan balance: " ; 
cin >> startingBalance; //User input starting loan balance 
if (startingBalance <= 0){ 
    cout <<"\nPlease enter a positive number: " ; 
    cin >> startingBalance; 
} 
cout << "\nAnnual interest rate: " ; 
cin >> interestRate; //User input interest rate 
if ((interestRate <= 0) || (interestRate > 1)){ 
    cout <<"\nPlease enter an interest rate ranging from 0 to 1: " ; 
    cin >> interestRate; 
} 
cout << "\nMonthly payment: " ; 
cin >> monthlyPayment; //User input monthly payment 
if (monthlyPayment <= 0){ 
    cout <<"\nPlease enter a positive number: " ; 
    cin >> interestRate; 
} 

startingBalance = balance; 

cout << "\nMonth \t Balance\n" << endl; //Outputs a schedule of payments 

while ((balance > 0) || (month < 61)) 
{ 
    balance += (startingBalance * (interestRate/12)); 
    balance -= monthlyPayment; 

    month = month++; 

    cout << month << "\t" << balance << "\n"; 

} 



    return 0; 
}

我相信陳述正確的，但我不斷收到這些作爲結果

Starting loan balance: 10000.00 

Annual interest rate: 0.0525 

Monthly payment: 500.00 

Month  Balance 
1   -500.000 
2   -1000.00 
3   -1500.00

依此類推，直到61個月已經過去了。

來源

2014-01-29 nnpalmore

編譯所有警告和調試信息（'G ++ -Wall -g'）。學習**使用調試器**（可能是'gdb'） –

您從未將起始餘額設置爲貸款金額。 – OldProgrammer

startingBalance = balance;

，看起來像它應該被逆轉

while ((balance > 0) || (month < 61))

你的描述建議& &會更合適

來源

2014-01-29 01:08:18 guest

C++貸款計算器

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