account.h

C++Primer 第四版 包括windows 平台下各章的例子程序

/*
 * 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: [phone]
*/ 

#include <string>

class Account {
public:
    // interface functions here
    void applyint() { amount += amount * interestRate; }
friend int main();
    double balance() { return amount; }
public:
    static double rate() { return interestRate; }
    static void rate(double);  // sets a new rate
private:
    std::string owner;
    double amount; 
    static double interestRate;
    static double initRate();
private:
    static const std::string accountType;
private:
    static const int period = 30;  // interest posted every 30 days
    double daily_tbl[period]; // ok: period is constant expression
};
using std::string;
const string Account::accountType("Savings Account");

void Account::rate(double newRate) 
{
    interestRate = newRate; 
}