#include<iostream.h>
class Bank
{
private:
	double NO;
	float sum;
	float qu;
public:
	void creat()
	{
       
		cout<<"請創建帳號(NO)：";
		cin>>NO;
		cout<<endl;
	}
	void add()
	{
		
		cout<<"請輸入存錢數量（單位：元）：";
		cin>>sum;
		cout<<endl;
	}
	void deleted()
	{
	
		cout<<"請輸入取錢數額：（單位：元）";
		cin>>qu;
		cout<<endl;
		sum-=qu;
		cout<<sum;
	}
};
void main()
{

	Bank a;
	a.creat();
	a.add();
	a.deleted();
}