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I have just created a mortgage calculator and need some help figuring out how to add an amoritization table. Thanks!
Here is my following code in C++:
#include <iostream>
#include <cmath>
#define BUFF_MAX 8192
using namespace std;
//Program functions allow program to calculate input
double CalculatePayment(int TRM, double RTE, double AMT);
bool ValidateDouble(double Input, double Min, double Max);
bool ValidateInt(int Input, int Min, int Max);
int main()
{
int Year = 0;
double Amount = 0.0;
double RateAMT = 0.0;
double MonthlyPayment = 0;
char Continue[BUFF_MAX];
// set cout to appropriate operation
cout.precision(2); // Only display to decimal places
cout.setf(ios::fixed); // Never use scientific notation
cout.setf(ios::showpoint); // Always display decimal portion
do { //loop until user enters 'N' to end the program
//Allows user to input required information
cout << endl;
cout << "Thank you for using our mortgage calculator " << endl;
while ( true ) { //added a while loop - while fail is true
cout << "Please enter the mortgage amount: ";
cin >> Amount;
if ( ( Amount >= 0.005 ) && ( Amount < 10000000.005 ) ) break;
cin.clear(); // clear the error state
cin.ignore(BUFF_MAX, '\n'); // ignore all characters entered
// display error message
cout << "Enter a number between 0.01 and 10000000.00" << endl;
}
cout << "You entered $" << Amount << endl; //if no more errors, display number
while ( true ) { //added a loop to verift that the term etered is correct
cout << "Please enter the term of the loan (in years): ";
cin >> Year;
if ( ( Year >=1 ) && ( Year <50) ) break;
cin.clear(); // clear the error state
cin.ignore(BUFF_MAX, '\n'); // ignore all characters entered
// display error message
cout << "Enter a number between 1 and 50" << endl;
}
cout << "You entered: " << Year << " Years." <<endl;
while ( true ) { //added a loop to verify that the percentage entered is correct
cout << "Please enter the current interest rate percentage: ";
cin >> RateAMT;
if ( ( RateAMT >=0.005) && ( RateAMT <25.00) ) break;
cin.clear(); // clear the error state
cin.ignore(BUFF_MAX, '\n'); // ignore all characters entered
// display error message
cout << "Enter a interest rate between 1 and 25" << endl;
}
cout << "You entered: " << RateAMT << " %." <<endl;
cout <<endl;
// Calculate payment
MonthlyPayment = CalculatePayment(Year, RateAMT, Amount);
//Output of the total monthly payment
cout << "Mortgage Calculation" <<endl;
cout << "Term of the loan: " << Year << " years" << endl;
cout << "Amount of the loan: $" << Amount <<endl;
cout << "Current interest Rate: " << RateAMT << "%" <<endl;
cout << "The monthly payment is: $" << MonthlyPayment << endl;
cout <<endl;
cout << "Please enter Y for to make another calculation or N to end the program: ";
cin >> Continue;
} while ( (Continue[ 0 ] == 'Y') || (Continue[ 0 ] == 'y') );
}
//Calculate payment
double CalculatePayment(int TRM, double RTE, double AMT)
{
double RatePct = RTE / 100;
const int Months = 12;
TRM = TRM * Months;
return (AMT * pow ( ( 1 + ( RatePct / Months ) ),TRM) * (RatePct / Months ) ) /
( pow ( ( 1 + ( RatePct / Months ) ),TRM ) -1);
/* Scaffolding code for testing purposes */
cin.ignore(256, '\n');
cout << "Press ENTER to continue..." << endl;
cin.get();
/* End Scaffolding */
}
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