1 #include <iostream>
 2 using namespace std;
 3 
 4 //常量指標
 5 void test01(){
 6     int a = 4;
 7     int b = 2;
 8     int *const p = &a;
 9     cout<<"*p = "<<*p<<endl;
10     //p = &b;//報錯，指標常量說明不可以更改指標指向的地址
11     cout<<"*p = "<<*p<<endl;
12 
13     const
 
 int *q = &b;
14     //*q = 3;//報錯，常量指標不可以更改指標所指向的值
15 }
16 
17 //靜態變數
18 int& test02(){
19     int c = 10;
20     //函式結束c的值消失
21     static int d = 10;//函式結束不會消失
22     return d;
23 }
24 
25 int main() {
26     int a = 4;
27     int b = 2;
28     //test01();
29 
30     //test02();
31     //cout<<"d = "<<d<<endl;這個拿不到d
 
32 
33     //通過返回引用可以拿到
34     cout<<"d = "<<test02()<<endl;
35     return 0;
36 }