用c++写一个小型通讯录管理系统

好的，以下是一个简单的 C++ 通讯录管理系统的示例代码：

#include <iostream>
#include <string>
#include <vector>
using namespace std;

struct Contact {
    string name;
    string phone;
    string email;
};

vector<Contact> contacts;

void addContact() {
    Contact c;
    cout << "Enter name: ";
    getline(cin, c.name);
    cout << "Enter phone number: ";
    getline(cin, c.phone);
    cout << "Enter email: ";
    getline(cin, c.email);
    contacts.push_back(c);
    cout << "Contact added successfully!" << endl;
}

void showContacts() {
    if (contacts.empty()) {
        cout << "No contacts found!" << endl;
        return;
    }
    cout << "Name\tPhone\tEmail" << endl;
    for (const auto& c : contacts) {
        cout << c.name << "\t" << c.phone << "\t" << c.email << endl;
    }
}

int main() {
    int choice;
    while (true) {
        cout << "1. Add contact" << endl;
        cout << "2. Show contacts" << endl;
        cout << "3. Exit" << endl;
        cout << "Enter your choice: ";
        cin >> choice;
        cin.ignore(); // Ignore the newline character
        switch (choice) {
            case 1:
                addContact();
                break;
            case 2:
                showContacts();
                break;
            case 3:
                cout << "Exiting program..." << endl;
                return 0;
            default:
                cout << "Invalid choice! Please try again." << endl;
        }
    }
}

这个程序使用了一个 `Contact` 结构体来存储每个联系人的姓名、电话和电子邮件地址。用户可以选择添加联系人或查看当前存储的所有联系人。