这些代码在干嘛？

1.c

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#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>

_____

2.c

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#include<stdio.h>

main(){

intx=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++]);

}

3.c

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#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)}

4.c

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intn[]={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++);}

5.c

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main(){inti,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]); }

6.cpp

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#include <stdio.h>

#define _(_)putchar(_);

intmain(void){inti = 0;_(

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