用函数写一个简单的登录系统怎么搞啊

Question

妈的刚刚学了函数让我写这个，想哭，我也不太清楚怎么写，就学了点基本的定义调用申明什么的

Answer 1

这也不难啊，等着给你写一下
数组虽然是5个元素，实际只初始化了4个人啊

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

int ids[5] = {10001,10002,10003,10004};
char names[5][10] = {"张三","李四","王五","赵六"};
char passwords[5][16] = {"aaaaa","bbbbb","ccccc","ddddd"};
int uNum = 4;

char *selectUserById(int uid)
{
    for(int i=0;i<uNum;i++)
    {
        if(ids[i] == uid)
            return names[i];
    }
    return NULL;
}

char *selectPassById(int uid)
{
    for(int i=0;i<uNum;i++)
    {
        if(ids[i] == uid)
            return passwords[i];
    }
    return NULL;
}

int login(int uid,char *password)
{
    char *name = selectUserById(uid);
    if(name == NULL)
        return 1;
    char *pass = selectPassById(uid);
    if(pass == NULL)
        return 2;
    if(strcmp(pass,password) == 0)
        return 0;
    return 2;
}

void showLoginPage()
{
    int uid;
    char pass[16] = {0};

    while(1)
    {
        cout<<"请输入账号和密码：";
        cin>>uid>>pass;
        int res = login(uid,pass);
        if(res == 0)
        {
            cout<<"登录成功，正在进入首页"<<endl;
            break;
        }
        else if(res == 2)
        {
            cout<<"密码错误，请重新登录"<<endl;
            continue;
        }
        else
        {
            cout<<"账号不存在，正在进入注册界面"<<endl;
            break;
        }
    }
}

int main()
{
    showLoginPage();
}