C++PrimerPlus中文第六版第10章编程练习答案

1、

//bankaccount.h
#ifndef BANKACCOUNT_H_
#define BANKACCOUNT_H_

#include<string>

class BankAccount
{
private:
	std::string m_account_name;
	const char* m_account_number;
	double m_deposit;
public:
	BankAccount();
	BankAccount(std::string name, const char* number, double deposit);
	void show();
	void save(double fund);
	void draw(double fund);
};


#endif

//bankaccount.cpp
#include<iostream>
#include<string>
#include "bankaccount.h"

BankAccount::BankAccount()
{
    m_account_name = "Default Name";
    m_account_number = "********";
    m_deposit = 0;
}

BankAccount::BankAccount(std::string name, const char* number, double deposit)
{
    m_account_name = name;
    m_account_number = number;
    if (deposit < 0)
    {
        std::cout << "Deposit can't be negative, the deposit set to 0.\n";
        m_deposit = 0;
    }
    else
        m_deposit = deposit;
}

void BankAccount::show()
{
    using std::cout;
    using std::endl;
    using std::ios_base;
    cout << "Account name: " << m_account_name << endl;
    cout << "Account number: " << m_account_number << endl;
    ios_base::fmtflags orig = cout.setf(ios_base::fixed, ios_base::floatfield);
    std::streamsize prec = cout.precision(2);
    cout << "Account deposit: $" << m_deposit << endl;
    cout.setf(orig, ios_base::floatfield);
    cout.precision(prec);    
}

void BankAccount::save(double fund)
{
    m_deposit += fund;
}

void BankAccount::draw(double fund)
{
    if (fund > m_deposit)
        std::cout << "You can't draw the money more than you have. The drawing is failed.\n";
    else
        m_deposit -= fund;
}

2、

//person.h
#ifndef PRESON_H_
#define PERSON_H_

#include<string>

class Person
{
private:
    static const int LIMIT = 25;
    std::string m_lname;
    char m_fname[LIMIT];
public:
    Person() { m_lname = ""; m_fname[0] = '\0'; };
    Person(std::string lname, const char* fname = "NoFirstName");
    void Show() const;
    void FormalShow() const;
};
#endif

//person.cpp
#include<iostream>
#include<cstdlib>
#include<string>
#include "person.h"

Person::Person(std::string lname, const char* fname)
{
    m_lname = lname;
    strcpy_s(m_fname, fname);
}

void Person::Show() const
{
    using namespace std;
    cout << m_fname << ", " << m_lname << endl;
}

void Person::FormalShow() const
{
    using namespace std;
    cout << m_lname << ", " << m_fname << endl;
}

//useperson.cpp
#include<iostream>
#include "person.h"

int main()
{
    Person one;
    Person two("Smythecraft");
    Person three("Dimwiddy", "Sam");
    one.Show();
    one.FormalShow();
    two.Show();
    two.FormalShow();
    three.Show();
    three.FormalShow();
}

3、