练习题（P113）

#include<iostream>
using namespace std;

class Test
{
public:
static int x;
Test(int i = 10)
{
x = i + x;
}
int Getnum()
{
return Test::x+7;
}
};

int Test::x = 83;

int main()
{
Test test;
cout<<test.Getnum()<<endl;
return 0;
}