Hello World另类写法

 1 #include<iostream>
 2 #define _ using namespace std;
 3 #define __    int main()
 4 #define ___    {
 5 #define ____ cout<<"Hello World";
 6 #define _____ return 0;
 7 #define ______    }
 8 _
 9 __
10 ___
11 ____
12 _____
13 ______