c++编程设计并实现一个C++联系人类：contact，该类有name，tel和postcode三个私有属性，为该类设计若干方法，包括构造函数、存取三个私有属性的函数、显示联系人信息的函数等。（2）设计并实现一个通讯录类：addressBook，该类包含一个存放所有联系人的容器（可以用实验5中的CArray类实现，也可以用STL的容器实现）。（3）为addressBook设计若干方法，包括显示所有联系人、增加联系人、删除联系人、插入联系人、查找联系人等函数，以及将所有联系人保存到文件和从文件中读取联系人的函数。（4）设计主函数，显示操作选择菜单，完成通讯录的显示、增加、查找、删除和保存等功能。（5）建立一个C++工程，包含需要的.h和.cpp文件

以下是一个可能的实现：

#include <iostream>
#include <fstream>
#include <string>
#include <vector>

using namespace std;

class Contact {
private:
    string name;
    string tel;
    string postcode;
public:
    Contact(string name, string tel, string postcode) {
        this->name = name;
        this->tel = tel;
        this->postcode = postcode;
    }
    string getName() {
        return name;
    }
    string getTel() {
        return tel;
    }
    string getPostcode() {
        return postcode;
    }
    void setName(string name) {
        this->name = name;
    }
    void setTel(string tel) {
        this->tel = tel;
    }
    void setPostcode(string postcode) {
        this->postcode = postcode;
    }
    void display() {
        cout << "Name: " << name << endl;
        cout << "Tel: " << tel << endl;
        cout << "Postcode: " << postcode << endl;
    }
};

class AddressBook {
private:
    vector<Contact*> contacts;
public:
    void addContact(Contact* contact) {
        contacts.push_back(contact);
    }
    void removeContact(int index) {
        contacts.erase(contacts.begin() + index);
    }
    void insertContact(int index, Contact* contact) {
        contacts.insert(contacts.begin() + index, contact);
    }
    Contact* findContact(string name) {
        for (int i = 0; i < contacts.size(); i++) {
            if (contacts[i]->getName() == name) {
                return contacts[i];
            }
        }
        return NULL;
    }
    void displayAll() {
        for (int i = 0; i < contacts.size(); i++) {
            contacts[i]->display();
            cout << endl;
        }
    }
    void saveToFile(string filename) {
        ofstream outfile(filename);
        for (int i = 0; i < contacts.size(); i++) {
            outfile << contacts[i]->getName() << "," << contacts[i]->getTel() << "," << contacts[i]->getPostcode() << endl;
        }
        outfile.close();
    }
    void loadFromFile(string filename) {
        ifstream infile(filename);
        string line;
        while (getline(infile, line)) {
            int pos1 = line.find(",");
            int pos2 = line.find(",", pos1 + 1);
            string name = line.substr(0, pos1);
            string tel = line.substr(pos1 + 1, pos2 - pos1 - 1);
            string postcode = line.substr(pos2 + 1);
            Contact* contact = new Contact(name, tel, postcode);
            addContact(contact);
        }
        infile.close();
    }
};

int main() {
    AddressBook addressBook;
    while (true) {
        cout << "1. Display all contacts" << endl;
        cout << "2. Add a contact" << endl;
        cout << "3. Find a contact" << endl;
        cout << "4. Remove a contact" << endl;
        cout << "5. Save to file" << endl;
        cout << "6. Load from file" << endl;
        cout << "0. Exit" << endl;
        int choice;
        cin >> choice;
        if (choice == 0) {
            break;
        } else if (choice == 1) {
            addressBook.displayAll();
        } else if (choice == 2) {
            string name, tel, postcode;
            cout << "Name: ";
            cin >> name;
            cout << "Tel: ";
            cin >> tel;
            cout << "Postcode: ";
            cin >> postcode;
            Contact* contact = new Contact(name, tel, postcode);
            addressBook.addContact(contact);
        } else if (choice == 3) {
            string name;
            cout << "Name: ";
            cin >> name;
            Contact* contact = addressBook.findContact(name);
            if (contact == NULL) {
                cout << "Contact not found." << endl;
            } else {
                contact->display();
            }
        } else if (choice == 4) {
            int index;
            cout << "Index: ";
            cin >> index;
            addressBook.removeContact(index);
        } else if (choice == 5) {
            string filename;
            cout << "Filename: ";
            cin >> filename;
            addressBook.saveToFile(filename);
        } else if (choice == 6) {
            string filename;
            cout << "Filename: ";
            cin >> filename;
            addressBook.loadFromFile(filename);
        } else {
            cout << "Invalid choice." << endl;
        }
    }
    return 0;
}

这个程序实现了一个简单的通讯录，包括联系人类 Contact 和通讯录类 AddressBook。Contact 有三个私有属性 name、tel 和 postcode，以及构造函数、存取三个私有属性的函数和显示联系人信息的函数。AddressBook 包含一个存放所有联系人的容器 contacts，以及增加、删除、插入、查找、显示所有联系人、保存到文件和从文件中读取联系人等函数。主函数显示操作选择菜单，根据用户的选择调用相应的函数完成通讯录的显示、增加、查找、删除和保存等功能。