/*	filename: powers.cpp

	Program to demonstrate:	nested "for" loops

	Purpose: To display powers 1 through 5 of numbers 1 through 5 in
		 the output window

	Reference: Savitch, Chapter 7.4

*********************************************************************/

#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

int main()
{
	const int numPowers = 5;	// Define a constant to store the number
								// of loop iterations
	int base = 0, power = 0;	// Declare and define variables
	char anyKey = 0;

	// Print headings
	cout << setw(4) << "Base" << setw(10) << "Power" << setw(15)
		 << "Base^Power" << endl;
	cout << setw(4) << "----" << setw(10) << "-----" << setw(15)
		 << "----------" << endl;

	// The code below displays powers 1 through 5 of numbers 1 through 5.
	// The outer loop determines the base, while the inner loop determines
	// the power.
	for (base = 1; base <= numPowers; base++) {

		for (power = 1; power <= numPowers; power++)
			cout << setw(4) << base << setw(10) << power
			     << setw(15) << pow(base, power) << endl;

		// Print a blank line between different bases
		cout << endl;

		// Pause display so output can be read
		if (base == 2) {
			cout << "\nPress any key, then <Enter>, to continue ...";
			cin >> anyKey;
			cout << endl;
			} // end if

		} // end outer for

	cout << endl;

	return 0;
}