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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <cmath>
  4. using namespace std;
  5.  
  6. int main() {
  7.     double loanAmount, annualRate, monthlyRate, monthlyPayment, totalPaid, interestPaid;
  8.     int numPayments;
  9.  
  10.     // Ask user for input
  11.     cout << "Enter the loan amount: $";
  12.     cin >> loanAmount;
  13.  
  14.     cout << "Enter the annual interest rate (percent, e.g., 12 for 12%): ";
  15.     cin >> annualRate;
  16.  
  17.     cout << "Enter the number of monthly payments: ";
  18.     cin >> numPayments;
  19.  
  20.     // Calculate monthly interest rate (decimal)
  21.     monthlyRate = annualRate / 12.0 / 100.0;
  22.  
  23.     // Calculate monthly payment using formula
  24.     monthlyPayment = (loanAmount * monthlyRate) / (1 - pow(1 + monthlyRate, -numPayments));
  25.  
  26.     // Calculate total amount paid and interest
  27.     totalPaid = monthlyPayment * numPayments;
  28.     interestPaid = totalPaid - loanAmount;
  29.  
  30.     // Display report
  31.     cout << fixed << setprecision(2);
  32.     cout << "\n--- Loan Payment Report ---\n";
  33.     cout << "Loan Amount: $" << loanAmount << endl;
  34.     cout << "Monthly Interest Rate: " << monthlyRate * 100 << "%" << endl;
  35.     cout << "Number of Payments: " << numPayments << endl;
  36.     cout << "Monthly Payment: $" << monthlyPayment << endl;
  37.     cout << "Amount Paid Back: $" << totalPaid << endl;
  38.     cout << "Interest Paid: $" << interestPaid << endl;
  39.  
  40.     return 0;
  41. }
  42.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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Enter the loan amount: $Enter the annual interest rate (percent, e.g., 12 for 12%): Enter the number of monthly payments: 
--- Loan Payment Report ---
Loan Amount: $0.00
Monthly Interest Rate: 0.00%
Number of Payments: 5253
Monthly Payment: $-nan
Amount Paid Back: $-nan
Interest Paid: $-nan
https://ideone.com/7ebCB4
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

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