www.gusucode.com > C++ Primer 书籍源代码源码程序 > C++ Primer 书籍源代码源码程序/code/6/doWhile.cpp

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/*
 * This file contains code from "C++ Primer, Fourth Edition", by Stanley B.
 * Lippman, Jose Lajoie, and Barbara E. Moo, and is covered under the
 * copyright and warranty notices given in that book:
 * 
 * "Copyright (c) 2005 by Objectwrite, Inc., Jose Lajoie, and Barbara E. Moo."
 * 
 * 
 * "The authors and publisher have taken care in the preparation of this book,
 * but make no expressed or implied warranty of any kind and assume no
 * responsibility for errors or omissions. No liability is assumed for
 * incidental or consequential damages in connection with or arising out of the
 * use of the information or programs contained herein."
 * 
 * Permission is granted for this code to be used for educational purposes in
 * association with the book, given proper citation if and when posted or
 * reproduced.Any commercial use of this code requires the explicit written
 * permission of the publisher, Addison-Wesley Professional, a division of
 * Pearson Education, Inc. Send your request for permission, stating clearly
 * what code you would like to use, and in what specific way, to the following
 * address: 
 * 
 * 	Pearson Education, Inc.
 * 	Rights and Contracts Department
 * 	75 Arlington Street, Suite 300
 * 	Boston, MA 02216
 * 	Fax: (617) 848-7047
*/ 

#include <iostream>
using std::cin; using std::cout; using std::endl;
#include <string>
using std::string;

int main()
{
    // repeatedly ask user for pair of numbers to sum
    string rsp;  // used in the condition; can't be defined inside the do
    do {
        cout << "please enter two values: ";
        int val1, val2;
        cin  >> val1 >> val2;
        cout << "The sum of " << val1 << " and " << val2
             << " = " << val1 + val2 << "\n\n"
             << "More? [yes][no] ";
        cin  >> rsp;
    } while (!rsp.empty() && rsp[0] != 'n');
}