自编的未完的

#include<iostream>#include<string>using namespace std;struct Account{    long }void work();void openAccount();void pid();void deposit();void withdrawal();void transfer();int main(){    int i;    cout<<"                +------------------------------------------+"<<endl;cout<<"                |                                          |"<<endl;cout<<"                |                                          |"<<endl;cout<<"                |        欢迎使用储蓄业务综合平台          |"<<endl;cout<<"                |                                          |"<<endl;cout<<"                |                                          |"<<endl;cout<<"                +------------------------------------------+"<<endl;    string username;    string password;for(i=0;i<3;i++){    cout<<"请输入用户名：";    cin>>username;    cout<<endl;        cout<<"请输入密码：";    cin>>password;    cout<<endl;    if((username=="admin")&&(password=="admin"))    {        cout<<"输入正确，请选择业务前的序号"<<endl;        work();    }    else    {        if(i<2)        cout<<"用户名或密码输入错误，请重新输入！"<<endl;        else        {            cout<<"您已三次输入错误的用户名或密码，系统将自动退出！"<<endl;        }        }}return 0;}void work(){    int order;    cout<<"               +-------------------------------+"<<endl;    cout<<"               |-----1.开户-2.查询-3.存款------|"<<endl;    cout<<"               |-----4.取款-5.转账-6.退出------|"<<endl;    cout<<"               +-------------------------------+"<<endl;    cin>>order;    switch(order){    case 1:    openAccount();    break;    case 2:    pid();    break;    case 3:    deposit();    break;    case 4:    withdrawal();    break;    case 5:    transfer();    break;    default:    break;    }}void openAccount(){}void pid(){}void deposit() { }void withdrawal()   {   }void transfer()   {   }