c++实例之通讯录管理系统之清空联系人功能（七）

#include<iostream>
using namespace std;
constexpr auto MAX = ;

//联系人结构体
struct Person
{
    string m_name;
    int m_sex;
    int m_age;
    string m_phone;
    string m_address;

};
//通讯录结构体
struct AddressBooks
{
    //联系人数组
    struct Person personArray[MAX];
    //记录联系人个数
    int m_size;
};

//添加人员
void addPerson(AddressBooks* abs) {
    //判断通讯录是否已满，已满就不再添加
    if (abs->m_size == MAX) {
        cout << "通讯录已满" << endl;
    }
    else{
        string name;
        int sex;
        int age;
        string phone;
        string address;
        cout << "请输入姓名：";
        cin >> name;
        while (true) {
            cout << "请输入性别（0代表男，1代表女）：";
            cin >> sex;
            if (sex ==  || sex == ) {
                break;
            }else{
                cout << "您输入有误，请重新输入！" << endl;
            }
        }
        cout << "请输入年龄：";
        cin >> age;
        cout << "请输入电话：";
        cin >> phone;
        cout << "请输入地址：";
        cin >> address;
        abs->personArray[abs->m_size].m_name = name;
        abs->personArray[abs->m_size].m_sex = sex;
        abs->personArray[abs->m_size].m_age = age;
        abs->personArray[abs->m_size].m_phone = phone;
        abs->personArray[abs->m_size].m_address = address;
        abs->m_size++;
        cout << "添加成功！" << endl;
        //请按任意键继续
        system("pause");
        //清屏
        system("cls");
    }
}
//显示联系人
void showPerson(AddressBooks* abs) {
    if (abs->m_size == ) {
        cout << "当前记录为空" << endl;
    }else {
        for (int i = ; i < abs->m_size; i++) {
            cout << "姓名：" << abs->personArray[i].m_name << "\t"
                << "性别：" << (abs->personArray[i].m_sex ==  ? "男" : "女") << "\t"
                << "年龄：" << abs->personArray[i].m_age << "\t"
                << "电话：" << abs->personArray[i].m_phone << "\t"
                << "地址：" << abs->personArray[i].m_address << endl;
        }
    }
    system("pause");
    system("cls");
}
//判断联系人是否存在，若存在，则返回所在下标，否则返回-1
int isExist(AddressBooks* abs,string name) {
    for (int i = ; i < abs->m_size; i++)
    {
        if (abs->personArray[i].m_name == name) {
            return i;
        }
    }
    return -;
}

//真正的删除操作
void del(AddressBooks* abs, int id) {
    for (int i = id; i < abs->m_size; i++)
    {
        abs->personArray[i] = abs->personArray[i + ];
    }
    abs->m_size--;
}

//查找并删除
void deletePerson(AddressBooks* abs) {
    string name;
    cout << "请输入要删除的名字：";
    cin >> name;
    int tmp;
    tmp = isExist(abs, name);
    if (tmp != -){
        del(abs, tmp);
        cout << "删除成功"<<endl;
    }else{
        cout << "查无此人"<<endl;
    }
    system("pause");
    system("cls");
}

//显示单个人信息
void showPerson(AddressBooks* abs,int i) {
    cout << "姓名：" << abs->personArray[i].m_name << "\t"
        << "性别：" << (abs->personArray[i].m_sex ==  ? "男" : "女") << "\t"
        << "年龄：" << abs->personArray[i].m_age << "\t"
        << "电话：" << abs->personArray[i].m_phone << "\t"
        << "地址：" << abs->personArray[i].m_address << endl;
}

//查找并返回相应信息
void findPerson(AddressBooks* abs) {
    string name;
    cout << "请输入要查找的名字：";
    cin >> name;
    int tmp;
    tmp = isExist(abs, name);
    if (tmp != -) {
        cout << "找到该人" << endl;
        showPerson(abs, tmp);
    }
    else {
        cout << "查无此人" << endl;
    }
    system("pause");
    system("cls");
}

//清空联系人
void clearAll(AddressBooks* abs) {
    abs->m_size = ;//逻辑清空
    cout << "通讯录已被清空！" << endl;
}
void modifyPerson(AddressBooks* abs) {
    string name;
    cout << "请输入要修改的名字：";
    cin >> name;
    int tmp;
    tmp = isExist(abs, name);
    if (tmp != -) {
        cout << "找到该人" << endl;
        showPerson(abs, tmp);
        string name;
        int sex;
        int age;
        string phone;
        string address;
        cout << "请输入姓名：";
        cin >> name;
        while (true) {
            cout << "请输入性别（0代表男，1代表女）：";
            cin >> sex;
            if (sex ==  || sex == ) {
                break;
            }
            else {
                cout << "您输入有误，请重新输入！" << endl;
            }
        }
        cout << "请输入年龄：";
        cin >> age;
        cout << "请输入电话：";
        cin >> phone;
        cout << "请输入地址：";
        cin >> address;
        abs->personArray[tmp].m_name = name;
        abs->personArray[tmp].m_sex = sex;
        abs->personArray[tmp].m_age = age;
        abs->personArray[tmp].m_phone = phone;
        abs->personArray[tmp].m_address = address;
        cout << "修改成功！" << endl;
    }
    else {
        cout << "查无此人" << endl;
    }
    system("pause");
    system("cls");
}

//菜单界面
void showMenu() {
    cout << "************************" << endl;
    cout << "***** 1.添加联系人 *****" << endl;
    cout << "***** 2.显示联系人 *****" << endl;
    cout << "***** 3.删除联系人 *****" << endl;
    cout << "***** 4.修改联系人 *****" << endl;
    cout << "***** 5.查找联系人 *****" << endl;
    cout << "***** 6.清空联系人 *****" << endl;
    cout << "***** 0.退出通讯录 *****" << endl;
    cout << "************************" << endl;
}

int main() {
    //创建通讯录结构体变量
    AddressBooks abs;
    abs.m_size = ;
    int select = ;
    while(true){
        showMenu();
        cout << "请输入相应的选项：" << endl;
        cin >> select;
        switch (select){
        case ://添加
            addPerson(&abs);
            break;
        case ://显示
            showPerson(&abs);
            break;
        case ://删除
            deletePerson(&abs);
            break;
        case ://修改
            modifyPerson(&abs);
            break;
        case ://查找
            findPerson(&abs);
            break;
        case ://清空
            clearAll(&abs);
            break;
        case ://退出
            cout << "欢迎下次使用" << endl;
            system("pause");
            return ;
            break;
        }
    }
}