ch-02-ex-03-solution.cpp
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	/*
	* chapter-02-exercise-04.cpp
	*
	* Using the while loop
	*
	* Created on: Aug 19, 2012
	* Author: Radu Popescu <radu.popescu@epfl.ch>
	*/

	#include <iostream>

	int main(int argc, char* argv[])
	{
	int number = 0, sum = 0;

	/*
	* Point 1. Terminate reading numbers when -1 is input by the user
	*/
	while (number >= 0) {
	sum += number;
	std::cout << "Please input numbers. Terminate with -1 :";
	std::cin >> number;
	}
	std::cout << "The sum of the numbers is: " << sum << std::endl;

	/*
	* Point 2. Terminate reading numbers when -1 is input by the user
	* or when sum exceedes 100.
	*/
	do {
	std::cout << "Please input numbers. Terminate with -1 :";
	std::cin >> number;
	if (number != -1) sum += number;
	} while ((number >= 0) && (sum <= 100));
	std::cout << "The sum of the numbers is: " << sum << std::endl;

	/*
	* Point 3. Reset sum by inputting -2
	*/
	do {
	std::cout << "Please input numbers. Terminate with -1. Reset with -2 :";
	std::cin >> number;
	switch (number) {
	case -1:
	break;
	case -2:
	sum = 0;
	break;
	default:
	sum += number;
	break;
	}
	} while ((number >= 0) && (sum <= 100));
	std::cout << "The sum of the numbers is: " << sum << std::endl;

	return 0;
	}