c++1

2022-11-02 10:55:34

1数组逆置

2数组冒泡排序

3&取地址符

其作用就是让形参能作用到实参。

下面看一个实例

通讯录简单管理系统

#include<iostream>
#include<string.h>
using namespace std;
#define MAX 1000
struct Person
{
    string m_name;
    int m_sex;
    int m_age;
    string m_Phone;
    string m_Addr;
};
struct AddressBook
{
    struct Person personArray[MAX];
    int size;
};
void AddPerson(AddressBook* abs) {
    if (abs->size == MAX)
    {
        cout << "已满" << endl;
    }
    else {
        string name;
        cout << "输入姓名" << endl;
        cin >> name;
        //这里要打一遍就方便理解了，这个->即.即包含关系，翻译成 “的”
        abs->personArray[abs->size].m_name = name;

        int sex;
        cout << "输入性别" << endl;
        cout << "1男2女" << endl;
        cin >> sex;
        abs->personArray[abs->size].m_sex = sex;

        int age;
        cout << "输入年龄" << endl;
        cin >> age;
        abs->personArray[abs->size].m_age = age;

        int phone;
        cout << "输入电话" << endl;
        cin >> phone;
        abs->personArray[abs->size].m_Phone = phone;

        string address;
        cout << "输入地址" << endl;
        cin >> address;
        abs->personArray[abs->size].m_Addr = address;

        cout << "添加成功" << endl;
        abs->size++;

        system("pause");//按任意键继续
        system("cls");//清屏的操作
    }
};
void Show_Person(AddressBook *abs)
{
    if (abs->size == 0)
    {
        cout << "当前通讯录为空" << endl;
    }
    else
    {
        for (int i = 0; i < abs->size; i++)
        {
            cout << "姓名" << abs->personArray->m_name <<"/t";
            cout << "年龄" << abs->personArray->m_age << "/t";
            //作为一个判断当然可以，但是太麻烦了，所以一个三目运算符即可
            cout << "性别" << (abs->personArray->m_sex == 1 ?"男":"女") << "/t";
            cout << "电话" << abs->personArray->m_Phone << "/t";
            cout << "地址" << abs->personArray->m_Addr<< "/t";
            system("pause");
            system("cls");

        }
    }
}
//按照姓名删除需知道是否有这个人
int Exit_Person(AddressBook* abs, string name)
{
    for (int i = 0; i < abs->size; i++)
    {
        if (abs->personArray->m_name == name)
        {
            cout << "找到了有这个人" << endl;
            return abs->size;
        }
        else {
            cout << "没有这个人" << endl;
            return -1;
        }
    }
}
void Delete_Person(AddressBook* abs,string name)
{
    int res = Exit_Person(abs, name);
    if (res != -1)
    {
        for (int i = res; i < abs->size; i++)
        {
            //数组前移
            abs->personArray[i] = abs->personArray[i + 1];
        }
        abs->size--;
        cout << "删除成功" << endl;
    }
    else
    {
        cout << "game over" << endl;
    }
}


void ShowMenu()
{
    cout << "1添加" << endl;
    cout << "2显示" << endl;
    cout << "3删除" << endl;
    cout << "4查找" << endl;
    cout << "5修改" << endl;
    cout << "6清空" << endl;
    cout << "7退出" << endl;

};
int main()
{
    AddressBook abs;
    abs.size = 0;
    int select;
    string input_name;

    while (true)
    {
        ShowMenu();
        cin >> select;
        switch (select)
        {
        case 1:
            //只有加了取地址符&才能通过形参改变实参
            AddPerson(&abs);
            break;
        case 2:
            Show_Person(&abs);
            break;
        case 3:
            cout << "输入删除姓名" << endl;
            cin >> input_name;
            Delete_Person(&abs, input_name);
            break;
        case 4:
            break;
        case 5:
            break;
        case 6:
            break;
        case 7:
            cout << "退出" << endl;
            system("pause");
            return 0;
            break;
        default:
            break;
        }
    }
    system("pause");
    return 0;
}