#include <iostream>
#include <iomanip>   //for the "i/o manipulators" setw and setprecision
#include <cstdlib>
using namespace std;

//Interest is 6% annually.

int main()
{
	int nyears {0};
	cout << "How many years?\n";
	cin >> nyears;

	if (!cin) {
		cerr << "Not an acceptable number.\n";
			return EXIT_FAILURE;
	}

	double principal {1000.00};   //start with this many dollars
	cout << "Starting with what principal?\n";
	cin >> principal;

	if (!cin) {
		cerr << "Not an acceptable principal\n";
		return EXIT_FAILURE;
	}
	double rate {0.0};
	cout << "What is the annual interest rate in percent (e.g., 6)? ";
	cin >> rate;

	if (!cin) {
		cerr << "not an acceptable rate\n";
		return EXIT_FAILURE;
	}
	cout << "year  principal\n"   //column headings
             << "----  ---------\n";

	for (int year {1}; year <= nyears; ++year) {
		principal *= 1 + 0.1 * rate;   //means principal = principal * 1.06

		cout << "  " << setw(2) << year << "   $"
			<< fixed << setprecision(2) << principal << "\n";
	}

	return EXIT_SUCCESS;
}