/* The following code example is taken from the book * "The C++ Standard Library - A Tutorial and Reference" * by Nicolai M. Josuttis, Addison-Wesley, 1999 * * (C) Copyright Nicolai M. Josuttis 1999. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */#include <cstdlib>#include <iostream>using namespace std;int main(){    double x, y;        // operands    // print header string    cout << "Multiplication of two floating point values" << endl;    // read first operand    cout << "first operand:  ";    if (! (cin >> x)) {        /* input error         *  => error message and exit program with error status         */        cerr << "error while reading the first floating value"             << endl;        return EXIT_FAILURE;    }    // read second operand    cout << "second operand: ";    if (! (cin >> y)) {        /* input error         *  => error message and exit program with error status         */        cerr << "error while reading the second floating value"             << endl;        return EXIT_FAILURE;    }    // print operands and result    cout << x << " times " << y << " equals " << x * y << endl;}