引用静态数据成员

 1 #include <iostream>
 2 
 3 /* run this program using the console pauser or add your own getch, system("pause") or input loop */
 4 using namespace std;
 5 class Box
 6 {
 7     public:
 8         Box(int,int);
 9         int volume();
10         static int height;
11         int width;
12         int length;
13 };
14 
15 Box::Box(int w ,int len)
16 {
17     width=w;
18     length=len;
19 }
20 
21 int Box::volume()
22 {
23     return(height*width*length);
24 }
25 int Box::height=10;
26 
27 int main(int argc, char** argv) {
28     Box a(15,20),b(20,30);
29     cout<<a.height<<endl;
30     cout<<b.height<<endl;
31     cout<<Box::height<<endl;
32     cout<<a.volume()<<endl;
33     return 0;
34 }