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Old 11-19-2009, 03:53 PM   #1
smeezekitty
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C programming puzzle


Coolin' down from all the flame wars about making good code, its time to test how somone is at decoing bad code:
can you tell what this does without running it:
Code:
#include <conio.h>
#define DZF92(c, x) (((c)==0)?0:(((x%2)==0)?(c-1):(c-2)))
void pstx(char *s){
int i = 0;
while(putch(DZF92(s[i], (++i)))){
if(DZF92(s[i], i) == ','){gotoxy(wherex() + 1, wherey());}
}
}
int main(){
char boopalot[] = {' ', 74, 102, 110, 109, 113, 45, 121, 112, 116, 109, 102, 34, 0};
pstx(boopalot);
return 0;
}
 
Old 11-19-2009, 04:18 PM   #2
mjones490
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Looks to me like it prints "Hello, world!" on the screen.
 
Old 11-19-2009, 06:58 PM   #3
smeezekitty
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Quote:
Originally Posted by mjones490 View Post
Looks to me like it prints "Hello, world!" on the screen.
LOL you must have ran it.
 
Old 11-19-2009, 07:15 PM   #4
sarum1990
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That's pretty cool, I actually went through it line by line. Awhile ago I stumbled across a single file that was, a bash program, a Makefile, and C source code, all with very tricky comment notation so that if you made the file executable, you could like run it 3 times and compile and run a C program. That was probably the craziest obfuscation I've seen in code. Can't find it now, but it was really interesting.
 
Old 11-20-2009, 08:05 AM   #5
mjones490
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Quote:
Originally Posted by smeezekitty View Post
LOL you must have ran it.
I ran it on my brain.

No, it's just that I've seen enough obfuscated "Hello, World!" programs to recognize the ASCII codes for the letters, and with the little "subtract one from every other character", that accounts for the simple mutations in the codes.
 
Old 11-20-2009, 08:13 AM   #6
mjones490
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My favorite obfuscated program is the one with three lines of mostly parentheses, that when you run it it prints out a naked woman showing her poonanners to the whole world.
 
Old 11-23-2009, 01:23 AM   #7
smeezekitty
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Quote:
Originally Posted by mjones490 View Post
My favorite obfuscated program is the one with three lines of mostly parentheses, that when you run it it prints out a naked woman showing her poonanners to the whole world.
obfuscation is fun!
 
  


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