For loops(financial Application) in C++

[XD05]

user need to enter loan amount and periods number of years.The interest is fixed 5% to 8% , with an increment of 1/8. for loop, c++.


i have write the program but something wrong on it.

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

int main()
{
double interestRate;
double loanAmount;
double numberOfYears;
double monthlyPayment;
double totalPayment;

cout <<" Interest rate Monthly Payment Total payment\n";

//Display the table body

for (int interestRate = 5.0 ; interestRate <= 8.0 ; interestRate+=0.125)
cout << setw(3) << fixed << interestRate;
cin >> interestRate;
cout<<" \n";


// Prompt user to enter loan amount
cout <<" Enter loan amount : " << endl;
cin >> loanAmount;

// Prompt user to enter years
cout <<" Enter number of Years : " << endl;
cin >> numberOfYears ;

// Calculate payment
int i;
for( i = numberOfYears ; i < monthlyPayment ; i++)
{
double monthlyPayment = (loanAmount * interestRate) / ( 1.0 - 1.0 / pow(1.0 + interestRate , numberOfYears * 12.0));
monthlyPayment = static_cast<int>(monthlyPayment * 100) / 100.0;
cout << setw(3) << monthlyPayment << i;
cout <<" \n ";
}

int j;
for (j= numberOfYears; j < totalPayment ; j++;)
{
double totalPayment = monthlyPayment * numberOfYears * 12.0;
totalPayment = static_cast<int>(totalPayment * 100) / 100.0;
cout << setw(3) << j;
cout << " \n ";
}



return 0;
}

[weaknessforcats]

Time to learn how to use your debugger.

I'm short of time right now but I do see places where you move a double to an int. Your compiler should be giving you a warning here since you cannot assign a double to an int. ints have no decimal places so an accurate assignment is not possible.

Some of your calculations are mixing int and double values. Everything should be all int or all floating point.

BTW: Finance calculations don't work well with floating point because of the rounding. Good finance code will use only int with the amount kept in pennies. So 123 is $1.23.

You only need to see the decimal point when you display the int:

value/100 is the dollars.
value %100 are the pennies

The code looks like:

cout << "$" << value/100 << "." << value $100;

On the screen you see $1.23

Post again and I will take a second look.

[XD05]

ermm
i wan to get my ans like this

for example:
Enter:
Loan Amount: 10000
Number of years: 5

Result:
Interest rate , Monthly Payment , Total payment
5% , 188.71 , 11322.74
5.125% , 189.28 , 11357.13
5.25% , 189.85 , 11391.59
……
7.85% , 202.16 , 12129.97
8.0% , 202.76 , 12165.83