下面的六个程序片段主要完成这些事情：
输出Hello, World
混乱C语言的源代码
下面的所有程序都可以在GCC下编译通过，只有最后一个需要动用C++的编译器g++才能编程通过。
hello1.c
#define _________ } #define ________ putchar #define _______ main #define _(a) ________(a); #define ______ _______(){ #define __ ______ _(0x48)_(0x65)_(0x6C)_(0x6C) #define ___ _(0x6F)_(0x2C)_(0x20)_(0x77)_(0x6F) #define ____ _(0x72)_(0x6C)_(0x64)_(0x21) #define _____ __ ___ ____ _________ #include<stdio.h> _____
hello2.c
#include<stdio.h> main(){ int x=0,y[14],*z=&y;*(z++)=0x48;*(z++)=y[x++]+0x1D; *(z++)=y[x++]+0x07;*(z++)=y[x++]+0x00;*(z++)=y[x++]+0x03; *(z++)=y[x++]-0x43;*(z++)=y[x++]-0x0C;*(z++)=y[x++]+0x57; *(z++)=y[x++]-0x08;*(z++)=y[x++]+0x03;*(z++)=y[x++]-0x06; *(z++)=y[x++]-0x08;*(z++)=y[x++]-0x43;*(z++)=y[x]-0x21; x=*(--z);while(y[x]!=NULL)putchar(y[x++]); } hello3.c
#include<stdio.h> #define __(a) goto a; #define ___(a) putchar(a); #define _(a,b) ___(a) __(b); main() { _:__(t)a:_('r',g)b:_('$',p) c:_('l',f)d:_(' ',s)e:_('a',s) f:_('o',q)g:_('l',h)h:_('d',n) i:_('e',w)j:_('e',x)k:_('/n',z) l:_('H',l)m:_('X',i)n:_('!',k) o:_('z',q)p:_('q',b)q:_(',',d) r:_('i',l)s:_('w',v)t:_('H',j) u:_('a',a)v:_('o',a)w:_(')',k) x:_('l',c)y:_('/t',g)z:___(0x0)} hello4.c
int n[]={0x48, 0x65,0x6C,0x6C, 0x6F,0x2C,0x20, 0x77,0x6F,0x72, 0x6C,0x64,0x21, 0x0A,0x00},*m=n; main(n){putchar (*m)!='/0'?main (m++):exit(n++);} hello5.c
main(){int i,n[]={(((1<<1)<<(1<<1)<<(1<< 1)<<(1<<(1>>1)))+((1<<1)<<(1<<1))), (((1 <<1)<<(1<<1)<<(1<<1)<<(1<<1))-((1<<1)<<( 1<<1)<<(1<<1))+((1<<1)<<(1<<(1>>1)))+ (1 <<(1>>1))),(((1<<1)<<(1<<1)<<(1<<1)<< (1 <<1))-((1<<1)<<(1<<1)<<(1<<(1>>1)))- ((1 <<1)<<(1<<(1>>1)))),(((1<<1)<<(1<<1)<<(1 <<1)<<(1<<1))-((1<<1)<<(1<<1)<<(1<<(1>>1 )))-((1<<1)<<(1<<(1>>1)))),(((1<<1)<< (1 <<1)<<(1<<1)<<(1<<1))-((1<<1)<<(1<<1)<<( 1<<(1>>1)))-(1<<(1>>1))),(((1<<1)<<(1<<1 )<<(1<<1))+((1<<1)<<(1<<1)<<(1<<(1>>1))) -((1<<1)<<(1<<(1>>1)))),((1<<1)<< (1<<1) <<(1<<1)),(((1<<1)<<(1<<1)<<(1<<1)<<(1<< 1))-((1<<1)<<(1<<1))-(1<<(1>>1))),(((1<< 1)<<(1<<1)<<(1<<1)<<(1<<1))-((1<<1)<< (1 <<1)<<(1<<(1>>1)))-(1<<(1>>1))), (((1<<1 )<<(1<<1)<<(1<<1)<<(1<<1))- ((1<<1)<< (1 <<1)<<(1<<(1>>1)))+(1<<1)), (((1<<1)<< ( 1<<1)<<(1<<1)<< (1<<1))-((1<<1)<< (1<<1) <<(1<<(1>>1)))-((1<<1) <<(1<< (1>>1)))), (((1<<1)<< (1<<1)<<(1<<1)<< (1<<1))- ((1 <<1)<<(1<<1)<<(1<<1))+((1<<1)<< (1<<(1>> 1)))), (((1<<1)<<(1<<1) <<(1<<1))+(1<<(1 >>1))),(((1<<1)<<(1<<1))+((1<<1)<< (1<<( 1>>1))) + (1<< (1>>1)))}; for(i=(1>>1);i <(((1<<1) <<(1<<1))+((1 <<1)<< (1<<(1>>1 ))) + (1<<1)); i++) printf("%c",n[i]); } hello6.cpp
下面的程序只能由C++的编译器编译（比如：g++）
#include <stdio.h> #define _(_) putchar(_); int main(void){int i = 0;_( ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++i)_(++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++++++++i)_(++++++++++++++ i)_(--++i)_(++++++i)_(------ ---------------------------- ---------------------------- ---------------------------- ---------------------------- ----------------i)_(-------- ----------------i)_(++++++++ ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++ ++++++++++++++++++++++++++i) _(----------------i)_(++++++ i)_(------------i)_(-------- --------i)_(---------------- ---------------------------- ---------------------------- ---------------------------- ---------------------------- ------i)_(------------------ ---------------------------- i)return i;} （全文完）
