/*
 * Copyright (c) 3rd November 2011, Luca Risolia
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the <organization> nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY <copyright holder> ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <iostream>
#include <cassert>
#include <string>

/*
 * We need to overload readline() by return type, so that following code is
 * valid:
 * T1 v1 = readline();
 * const T2 v2 = readline();
 * The original trick has been taken from an article (in italian) by Carlo Pescio at
 * http://www.eptacom.net/pubblicazioni/pub_it/nl_7.html
 */

class ReadProxy {
    friend ReadProxy readline(std::istream&);
private:
    std::istream& input;
    mutable bool done;

    ReadProxy(std::istream &i) : input(i), done(false) { }
    ReadProxy(const ReadProxy&);
    ReadProxy& operator=(const ReadProxy&);
public:

    template<typename T>
    operator T() const {
        done = true;
        T t;
        input >> t;
        return t;
    }

    ~ReadProxy() {
        // To detect spurious temporaries:
        assert(done == true);
    }
};

ReadProxy readline(std::istream& i = std::cin) {
    return ReadProxy(i);
}

/*
 * Note that the following is valid code, although y and z may read different values
 * const ReadProxy& x = readline();
 * int y = x;
 * int z = x;
 */

int main(int argc, char** argv) {
    std::cout << "Insert the item: ";
    std::string item = readline();
    std::cout << "Insert the quantity: ";
    int quantity = readline();
    std::cout << "Item: " << item << " Quantity: " << quantity << '\n';
    return 0;
}