This page combines two things I like: 'Hello, World!' programs and obfuscated C programs. The following programs should all compile with GCC and the Borland command line compiler for Windows (bcc32).

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++