ch-02-ex-03-solution.cpp
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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;
			}