抵押貸款計算器公式不正確

Question

我正在爲我的課製作抵押計算器，程序運行但答案不正確，我想我有正確的公式，但也許我宣佈我的變量是錯誤的。

這是我迄今爲止

#include <iostream> 
#include <cmath> 
using namespace std; 

int main() 
{ 
    //Variables 
    double rate; 
    rate = rate/1200.0; 

    double term; 
    term = term * 12; 

    double principal; 

    double monthlyPayment; 
    monthlyPayment = (principal * rate)/(1.0 - pow(rate + 1, -term)); 


    //Gathering Values 
    cout << "Please enter your interest rate." << endl; 
    cin >> rate; 

    cout << "Please enter your term." << endl; 
    cin >> term; 

    cout << "please enter your principal" << endl; 
    cin >> principal; 

    //Formula 
    monthlyPayment = principal * rate/(1.0 - pow(rate + 1, -term)); 

    //Result 
    cout << "Your monthly payment is, " << monthlyPayment << endl; 

    return 0; 
} 

Answer 1

你做的所有cin語句之前不被您的計算因素的數學。另外，計算monthlyPayment的第二個公式在分子中缺少括號。