面向对象c++静态成员的使用

#include<iostream.h>
#include<iomanip.h>
class point
{
private:
int x;
static int count;
public:
point(int m)
{
x=m;
count++;
}
~point()
{
count--;
cout<<count<<endl;
}
void show()
{
cout<<x<<setw(8)<<count<<endl;
}
};
int point::count=0;
int main()
{
point p1(3);
p1.show();
point p2(6);
p2.show();