声明一个 Employee 类，其中包括姓名、地址（使用指针，动态分配空间和设置内容）、邮编等属性，以及 change name、change_address和 display等函数。display()显示姓名、地址、邮编等属性， change_name改变对象的姓名属性，change_address更改地址信息。（可使用cstring函数库中的strcpy、strlen函数） 注意有动态内存分配new操作就要有动态内存释放delete操作。 提示：要有构造函数、拷贝构造函数、析构函数，在构造函数中使用new分配address空间并拷贝内容。然后使用Employee类，设定第一个对象的属性后第二个对象用第一个对象初始化；修改第二个对象的姓名和地址，分别显示每个对象信息；

以下是实现Employee类的代码：

#include <iostream>
#include <cstring>

class Employee {
private:
    char* name;
    char* address;
    int postal_code;

public:
    Employee(const char* name_, const char* address_, int postal_code_) : postal_code(postal_code_) {
        name = new char[strlen(name_) + 1];
        strcpy(name, name_);

        address = new char[strlen(address_) + 1];
        strcpy(address, address_);
    }

    Employee(const Employee& other) {
        name = new char[strlen(other.name) + 1];
        strcpy(name, other.name);

        address = new char[strlen(other.address) + 1];
        strcpy(address, other.address);

        postal_code = other.postal_code;
    }

    ~Employee() {
        delete[] name;
        delete[] address;
    }

    void change_name(const char* new_name) {
        delete[] name;
        name = new char[strlen(new_name) + 1];
        strcpy(name, new_name);
    }

    void change_address(const char* new_address) {
        delete[] address;
        address = new char[strlen(new_address) + 1];
        strcpy(address, new_address);
    }

    void display() const {
        std::cout << "Name: " << name << std::endl;
        std::cout << "Address: " << address << std::endl;
        std::cout << "Postal Code: " << postal_code << std::endl;
    }
};

int main() {
    Employee e1("John Smith", "123 Main Street", 12345);
    Employee e2 = e1;

    e2.change_name("Jane Doe");
    e2.change_address("456 Elm Street");

    std::cout << "Employee 1:" << std::endl;
    e1.display();

    std::cout << std::endl;

    std::cout << "Employee 2:" << std::endl;
    e2.display();

    return 0;
}

输出结果为：

Employee 1:
Name: John Smith
Address: 123 Main Street
Postal Code: 12345

Employee 2:
Name: Jane Doe
Address: 456 Elm Street
Postal Code: 12345

注意在构造函数中使用new动态分配内存，并在析构函数中使用delete释放内存，以避免内存泄漏。在拷贝构造函数中也要注意进行深拷贝，不能直接复制指针，需要重新分配内存并复制内容。