试图建立银行管理系统，但有错误

我想完成的事情是应用程序方法的功能，但从代码中得到许多错误，我不完全理解并试图解决，但一无所获。

#include <conio.h>
#include <stdio.h>
#include <iostream>

using namespace std;
class bank
{
char name [100],add[100],y;
int balance, amount;
public:
void open_account();
void deposite_money();
void withdraw_money();
void display_account();
};
void bank:open_account()
{
cout << "Enter your full name: ";
cin.ignore();
cin.getline(name,100);
cout << "What type of account you want to open savings (s) or current (c)";
cin >> y;
cout << "Enter amount of deposite: ";
cin >> balance;
cout << "Your account is created ";
}
void bank:deposite_money()
{
int a ;
cout << "Enter how much money you want to deposit: ";
cin >> a;
balance += a;
cout << "Your total deposit amountn ";
}
void bank:display_account()
{
cout << "Enter the name: "<<name<<endl;
cout << "Enter your address: "<<add<<endl;
cout << "Type of account that you open: "<<y<<endl;
cout << "Amount you deposite: "<<balance<<endl;
}
void bank:withdraw_money()
{
cout << "Withdraw: ";
cout << "Enter the amount of withdrawing";
cin >> amount;
balance = balance - amount;
cout << "Now your total amount left is" <<balance;
}
int main()
{
int ch,x,n;
bank obj;
do
{
cout <<"01")open accountn";
cout <<"02")deposite moneyn";
cout <<"03")withdraw moneyn";
cout <<"04")display accountn";
cout <<"05")Exitn";
cout << "Please select from the options above";
cin>>ch;
switch(ch)
{
case 1:"01")open accountn";
obj.open_account();
break;
case 2:"02")deposite moneyn";
obj.deposite_money();
break;
case 3:"03")withdraw moneyn";
obj.withdraw_money();
break;
case 4:"04")display accountn";
obj.display_account();
break;
case 5:
if(ch == 5)
{
cout <<  "Exit";
}
default:
cout<< "This is not the proper exit please try again";
}
cout << "ndo you want to select the next step then please press : yn";
cout << " If you want to exit then press : N";
x=getch();
if(x == 'y' || x == 'Y');
cout<< "Exit";
}
while (x == 'y' || x == 'Y');
getch();
return 0;
}

我遇到的错误是

error stray ''
error missing terminating character
error found ':' in nested name specifier
expected ; before ')' token

这些是通常出现在日志上的错误，并且在不同的行中重复了几次，请帮助我，以便我可以完成此应用程序 我从制作中学到了很多东西，并期待在学校开学前构建更多 非常感谢关于我下一步应该做什么的任何帮助和建议，并非常欢迎我从这次经历中学习

顺便说一句，我正在使用c ++，并且正在尝试构建一些项目，以便下次提供任何建议吗？在出现此错误后如何提高自己，以及我接下来应该练习什么，就像你们建议我的下一个项目一样