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

//Interest is 6% annually.

int main()
{

        cout << "What is the interest rate?";
	double principle {0.00};  //start with this many dollars 
        cin >> principle;

        if (!cin) {
		cerr << "Sorry, that wasn't a number.\n";
		return EXIT_FAILURE;
        }

	if (principle <=0) {
		cerr << "Sorry, the principle must be positive.\n";
		return EXIT_FAILURE;
	}

	cout << "For how many years? ";
	int nyears {0}
	cin >> nyears;

	if (!cin) {
		cerr << "Sorry, that wasn't a number.\n";
		retun EXIT_FAILURE;

	}

	if (nyears <= 0) {
		cerr << "Sorry, the number of years must be positive.\n";
		return EXIT_FAILURE;
			
	}

	cout << "What is the annual rate? ";
	double rate {0.00}
	cin >> rate;
	
	}

	if (!cin) {
		cerr << "Sorry, that wasn't a number.\n";
		return EXIT_FAILURE;

	}

	if (rate <=0) {
		cerr << "Sorry, the interest rate must be positive.\n";
		return EXIT_FAILURE;

	}

	double factor {1.00 + .01 * rate};

	cout << "year   principle\n"	//column headings
	     << "____   _________\n";

	for (int year {1}; year <= nyears; ++year) {
		principle *= factor; 	//meand principle = principle * factor
					
		cout << setw(4) << year << "	$"
			<< fixed << setprecision(2) << principal << "\n";

	}

	return EXIT_SUCCESS;