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()
   {

   }