下面的六個程序片段主要完成這些事情：

輸出Hello, World

混亂C語言的源代碼

下面的所有程序都可以在GCC下編譯通過，只有最后一個需要動用C++的編譯器g++才能編程通過。

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++的編譯器編譯（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;}

原文：http://cocre.com/?p=914

總結

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