International Obfuscated C Code Tattoo

chongo writes "Some people eschew obfuscation while other live for it. Thomas Scovell has taken obfuscation to a completely new personal level by obtaining the very first International Obfuscated C Code Tattoo. We (the IOCCC Judges) are pleased that Thomas has honored the 1984 anonymous IOCCC winning entry by placing the source code on his arm: the very first IOCCC winner to receive this distinction. The anonymous winner (a person who known for various things on the Internet and has been programming in and associated with C for decades) feels honored by the tattoo as well."

Comments

So... who was it?

[keiferb]

The article reads like we're almost supposed to know who 'Anonymous' is... Kernighan? Ritchie?

entry explained

[voisine]

int i;main(){for(;i["]i;++i){--i;}"];read('-'-'-',i+++ "hell\
o, world!\n",'/'/'/'));}read(j,i,p){write(j/p+p,i---j ,i/i);}
==== add some whitespace ==========
int i;
main()
{
for (; i["]i;++i){--i;}"]; read('-' - '-', i++ + "hello, world!\n", '/' / '/'));
}

read(j, i, p)
{
write(j / p + p, i-- - j, i / i);
}
===== and char subtraced from itself is 0, and char or pointer divided by itself is 1 =====
int i;
main()
{
for (; i["]i;++i){--i;}"]; read(0, i++ + "hello, world!\n", 1));
}

read(j, i, p)
{
write(j / p + p, i-- - j, 1);
}
======= j is always 0, p is always 1, lets remove them ======
int i;
main()
{
for (; i["]i;++i){--i;}"]; read(i++ + "hello, world!\n"));
}

read(i)
{
write(0 / 1 + 1, i-- - 0, 1);
}
======= 0 / 1 + 1 is 1, subtracting 0 does nothing, decrementing a local variable this is never used afterward also does nothing =======
int i;
main()
{
for (; i["]i;++i){--i;}"]; read(i++ + "hello, world!\n"));
}

read(i)
{
write(1, i, 1);
}
======== replace read(i) with write(1, i, 1) =====
int i;
main()
{
for (; i["]i;++i){--i;}"]; write(1, i++ + "hello, world!\n", 1));
}
====== i[n] can be rewritten *(i + n) or *(n + i) ======
int i;
main()
{
for (; *("]i;++i){--i;}" + i); write(1, "hello, world!\n" + i++, 1));
}
=== as i gets incrimented, we dereference the next char of the string which is always non-zero till we hit the null terminator, all the matters is that the string is the same length as "hello, world!\n" =====
int i;
main()
{
for (; *("hello, world!\n" + i); write(1, "hello, world!\n" + i++, 1));
}
===== so now we can see we incriment i, printing out the next character of hello world till we hit the null terminator ====