acount

 #include<iostream>
 using namespace std;
 class account
 {
 public:
     int de( int i, double b, double a)
     {
         id = i;
         balance = b;
         annuleinterestrate = a;
         return ;
     }
     int visit( int b)
     {
         switch (b)
         {
         case :cout << id;
             return ;
         case :cout << balance << endl;
             return ;
         case :cout << annuleinterestrate << endl;
             return ;
         }
     }
     int change(int b)
     {
         cout << "Please input the content:" << endl;
         switch (b)
         {
         case :cin >> id;
             return ;
         case :cin >> balance;
             return ;
         case :cin >> annuleinterestrate ;
             return ;
         }
     }
     double GetMonthlyInterestRate()
     {
         monthlyinterestrate =  annuleinterestrate/12.0;
         return monthlyinterestrate;
     }
     double withDraw()
     {
         double q;
         cout << "please input the number:" <<endl;
         cin >> q;
         balance += q;
         return balance;
     }
     double deposit()
     {
         double q;
         cout << "please input the number:" <<endl;
         cin >> q;
         balance -= q;
         return balance;
     }
 private:
     int id;
     double annuleinterestrate,monthlyinterestrate,balance;
 };
 int main()
 {
     int a,b;
     account acc;
     acc.de( ,,0.045 ) ;
     cout << "Please intput the function's number: (1 visit; 2 change; 3 GetMonthlyInterestRate;4 withDraw;5 deposit;)" << endl;
     cin >> a;
     switch (a)
     {
     case : cout << "which do you chose?(1 id;2 balance;3 annuleinterestrate)" << endl;
         cin >> b;
         acc.visit( b );
         break;
     case : cout << "which do you chose?(1 id;2 balance;3 annuleinterestrate)" << endl;
         cin >> b;
         acc.change( b );
         break;
     case : cout << acc.GetMonthlyInterestRate() << endl;
         break;
     case : cout << acc.withDraw() << endl;
         break;
     case : cout << acc.deposit() << endl;
         break;
     }
     return ;
 }