#include <iostream>
#include <iomanip>   // For i/o manipulators like setw and setprecision
#include <cstdlib>   // For EXIT_SUCCESS and EXIT_FAILURE
using namespace std;

// Function to check if input is valid
bool validate_input() {
    if (!cin) {
        cerr << "Invalid input. Please enter numeric values only.\n";
        cin.clear();  // Clear the error flag
        cin.ignore(1000, '\n');  // Discard invalid input
        return false;
    }
    return true;
}

int main() {
    double principal {0.0};  // User-provided initial investment
    int years {0};           // User-provided number of years
    double rate {0.0};       // User-provided annual interest rate (in percent)

    // Input for initial investment
    cout << "Please enter the initial investment amount: $";
    cin >> principal;
    while (!validate_input()) {
        cout << "Please enter the initial investment amount: $";
        cin >> principal;
    }

    // Input for number of years
    cout << "Please enter the number of years: ";
    cin >> years;
    while (!validate_input()) {
        cout << "Please enter the number of years: ";
        cin >> years;
    }

    // Input for annual interest rate
    cout << "Please enter the annual interest rate (in percent): ";
    cin >> rate;
    while (!validate_input()) {
        cout << "Please enter the annual interest rate (in percent): ";
        cin >> rate;
    }

    // Convert rate from percentage to a decimal (e.g., 6% to 0.06)
    rate /= 100;

    // Output the column headings
    cout << "\nYear  Principal\n"
         << "----  ---------\n";

    // Perform the compound interest calculation for each year
    for (int year {1}; year <= years; ++year) {
        principal *= (1 + rate);  // Compound interest formula
        cout << setw(4) << year << "   $" << fixed << setprecision(2) << principal << "\n";
    }

    return EXIT_SUCCESS;
}