/*
 * Copyright (c) JoinQuant Development Team
 * Author: Huayong Kuang <kuanghuayong@joinquant.com>
 *
 */

#include <iostream>

using namespace std;


class A {
public:
 static void test();
private:
 static int a; // 申明,必须在外部被定义
 static void init();
};

int A::a = 0; // 定义

void A::init() {
 a = 1001;
}

void A::test() {
 init();
 cout << a << endl;
}


int main(void)
{

 // using namespace A;
 A::test();

 return 0;
}