双冒号作用域运算符

#define _CRT_SECURE_NO_WARNINGS
#include
using namespace std;
int atk = 200;
void test01(){
int atk = 100;
cout << “攻击力：” << atk << endl;
cout << “攻击力：” << ::atk << endl; //双冒号调用全局
}
int main(){
test01();
system(“pause”);
return EXIT_SUCCESS;
}