第十周字符串除了用C++扩充的string类型外，按C语言的传统，还可以用char *表示

最新推荐文章于 2024-04-19 11:07:43 发布

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最新推荐文章于 2024-04-19 11:07:43 发布

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分类专栏： C++ 文章标签： class 对象类 string strcpy

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本文介绍了一个使用C++实现深复制的例子，通过将类中的string类型替换为char*来展示如何正确管理动态分配的内存。具体包括CPerson和CEmployee两个类的设计与实现，涉及构造函数、析构函数及成员函数的具体实现。

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<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">字符串除了用C++扩充的string类型外，按C语言的传统，还可以用char *表示。请将类声明中的string全部改为char *后，重新写一遍程序（此时的区别是，类中有指针成员，构造和析构函数需要考虑深复制的问题了。）</span>

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class CPerson

{

protected:

char *m_szName;

char *m_szId;

int m_nSex;//0:women,1:man

int m_nAge;

public:

CPerson(char *name,char *id,int sex,int age);

void Show1();

~CPerson();

};

class CEmployee:public CPerson

{

private:

char *m_szDepartment;

float m_Salary;

public:

CEmployee(char *name,char *id,int sex,int age,char *department,floatsalary);

void Show2();

~CEmployee();

};

int main()

{

char name[10],id[19],department[10];

int sex,age;

float salary;

cout<<"input employee'sname,id,sex(0:women,1:man),age,department,salary:\n";

cin>>name>>id>>sex>>age>>department>>salary;

CEmployee employee1(name,id,sex,age,department,salary);

employee1.Show2();

return 0;

}

[参考解答]

#include<iostream>
#include<string.h>
using namespace std;
class CPerson
{
protected:
    char* m_szName;
    char* m_szId;
    int m_nSex;//0:women,1:man
    int m_nAge;
public:
    CPerson(char* name,char* id,int sex,int age);
    void Show1();
    ~CPerson();
};

class CEmployee:public CPerson
{
private:
    char* m_szDepartment;
    double m_Salary;
public:
    CEmployee(char* name,char* id,int sex,int age,char* department,double salary);
    void Show2();
    ~CEmployee();
};
void CEmployee::Show2()
{
    Show1();
    cout<<"Department:"<<m_szDepartment<<endl<<"Salary:"<<m_Salary<<endl;
}
CEmployee::~CEmployee()
{
    delete[]m_szDepartment;
}
CEmployee::CEmployee(char* name,char* id,int sex,int age,char* department,double salary):CPerson(name,id,sex,age)
{
    m_szDepartment=new char[strlen(department)];
    strcpy(m_szDepartment,department);
    m_Salary=salary;
}
void CPerson::Show1()
{
    cout<<"Name:"<<m_szName<<endl<<"ID:"<<m_szId<<endl
        <<"Sex:"<<m_nSex<<endl<<"Age:"<<m_nAge<<endl;
}
CPerson::~CPerson()
{
    delete[]m_szId;
    delete[]m_szName;
}
CPerson::CPerson(char* name,char* id,int sex,int age)
{
    m_szName=new char[strlen(name)];
    m_szId=new char[strlen(id)];
    strcpy(m_szName,name);
    strcpy(m_szId,id);
    m_nSex=sex;
    m_nAge=age;
}
int main()
{
    char name[10],id[19],department[10];
    int sex,age;
    double salary;
    cout<<"input employee's name,id,sex(0:women,1:man),age,department,salary:\n";
    cin>>name>>id>>sex>>age>>department>>salary;
    CEmployee employee1(name,id,sex,age,department,salary);
    employee1.Show2();
    return 0;
}

测试结果如下：