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/8/manips.cpp
//Download by http://www.NewXing.com /* * 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 "io_preamble.h" int main() { cout << "default bool values: " << true << " " << false << "\nalpha bool values: " << boolalpha << true << " " << false << endl; bool bool_val = true; cout << boolalpha // sets internal state of cout << bool_val << noboolalpha; // resets internal state to default formatting cout << endl; const int ival = 15, jval = 1024; // const, so values never change cout << "default: ival = " << ival << " jval = " << jval << endl; cout << "printed in octal: ival = " << oct << ival << " jval = " << jval << endl; cout << "printed in hexadecimal: ival = " << hex << ival << " jval = " << jval << endl; cout << "printed in decimal: ival = " << dec << ival << " jval = " << jval << endl; { const int ival = 15, jval = 1024; // const so values never change cout << showbase; // show base when printing integral values cout << "default: ival = " << ival << " jval = " << jval << endl; cout << "printed in octal: ival = " << oct << ival << " jval = " << jval << endl; cout << "printed in hexadecimal: ival = " << hex << ival << " jval = " << jval << endl; cout << "printed in decimal: ival = " << dec << ival << " jval = " << jval << endl; cout << noshowbase; // reset state of the stream } cout << uppercase << showbase << hex << "printed in hexadecimal: ival = " << ival << " jval = " << jval << endl << nouppercase << endl; return 0; }