1 #include <iostream>
2
3 using namespace std;
4 //static类成员
5
6 class Account
7 {
8 public:
9 Account(string name,double money):
10 owner(name),amount(money){}
11 double getAmount() const
12 {
13 return this->amount;
14 }
15 void sepoist(double money)
16 {
17 this->amount+=money;
18 }
19 //静态函数操作静态的数据成员
20 //静态的成员函数中不能使用this指针
21 static double rate()
22 {
23 return interestRate;
24 }
25 static void rate(double newinterestRate)
26 {
27 interestRate=newinterestRate;
28 }
29 private:
30 string owner;
31 double amount;
32 //将利率设置成为静态的数据成员，即利率只有一个
33 //所有的对象都使用一个利率
34 static double interestRate;
35 };
36 //进行初始化
37 double Account::interestRate=0.015;
38
39 int main()
40 {
41 //静态的函数可以用类名直接调用
42 Account::rate(0.026);
43 Account a("张三",1000);
44 Account b("李四",2000);
45 a.sepoist(500);
46 b.sepoist(600);
47 cout<<a.getAmount()<<endl;
48 cout<<b.getAmount()<<endl;
49 cout<<a.rate()<<endl;
50 a.rate(0.018);
51 cout<<b.rate()<<endl;
52
53 return 0;
54 }
