A C++ console application that calculates monthly loan payments and displays a complete amortization schedule.
This loan calculator computes monthly payment amounts for loans and generates a detailed amortization table showing the breakdown of principal and interest for each payment period. The program demonstrates financial mathematics and proper formatting of tabular output in C++.
- Monthly Payment Calculation: Computes accurate monthly payments using loan amortization formula
- Amortization Schedule: Displays complete payment breakdown for entire loan duration
- Multi-file Architecture: Separates calculation logic from display logic
- Precise Calculations: Uses double precision for accurate financial computations
- Formatted Output: Professional table formatting with proper alignment
- C++
- Standard Template Library (STL)
<cmath>for mathematical calculations<iomanip>for formatted output- Visual Studio project structure
- Header files for code organization
The monthly payment is calculated using:
M = (P × r) / (1 - (1 + r)^(-n))
Where:
M = Monthly payment
P = Principal amount
r = Monthly interest rate (annual rate / 12 / 100)
n = Total number of months
- C++ compiler (Visual Studio recommended)
- Windows operating system
- Open the solution file in Visual Studio
- Build the solution (F7 or Build > Build Solution)
- Run the executable or press F5
- Run the program
- Enter the principal loan amount
- Enter the annual interest rate (as a percentage, e.g., 5.8)
- Enter the loan duration in years
- View the monthly payment and complete amortization schedule
Month Principal Interest Balance
----- --------- -------- -------
1 $425.30 $242.67 $49,574.70
2 $427.36 $240.61 $49,147.34
3 $429.43 $238.54 $48,717.91
...
- calcDisplay.cpp: Contains calculation and display functions
- calcDisplay.h: Header file with function declarations
- main.cpp: Program entry point and user interaction
Christian Burnett