#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <string>
#include <map>   //for map; include <utility> for class pair
using namespace std;

int main()
{
	map<string, double> gravity; //Default constructor constructs empty map.

	gravity["Mercury"] =  .27;   //gravity.operator[]("Mercury") = .27;
	gravity["Venus"]   =  .85;
	gravity["Earth"]   = 1.00;
	gravity["Mars"]    =  .38;
	gravity["Jupiter"] = 2.33;
	gravity["Saturn"]  =  .92;
	gravity["Uranus"]  =  .85;
	gravity["Neptune"] = 1.12;
	gravity["Pluto"]   =  .44;

	cout << "How many pounds do you weigh on Earth? ";
	double weight;
	if (!(cin >> weight)) {   //if (cin.operator>>(weight).operator!()) {
		return EXIT_FAILURE;
	}

	for (;;) {
		cout << "Type name of planet, or q to quit, and press RETURN: ";

		string name;
		if (!(cin >> name)) {
			if (cin.eof()) {
				break;
			}
			return EXIT_FAILURE;
		}
		if (name == "q") {
			break;
		}

		const double factor = gravity[name]; //gravity.operator[](name);

		if (factor == 0.0) {
			cout << "No planet is named \"" << name << "\".\n";
		} else {
			cout << "You would weigh " << weight * factor
				<< " pounds on " << name << ".\n";
		}
	}

	cout << "\n";
	cout << setprecision(2) << fixed; //two digits to right of decimal point

	for (map<string, double>::const_iterator it = gravity.begin();
		it != gravity.end(); ++it) {
		//cout << (*it).first << " " << (*it).second << "\n";
		cout << left << setw(7) << it->first << right << " "
			<< setw(4) << it->second << "\n";
	}

	return EXIT_SUCCESS;
}