ILLUSION:::C PROGRAM WITHOUT main()

Source code::::

#include<stdio.h>

#define decode(s,t,u,m,p,e,d)m##s##u##t

#define begin decode(a,n,i,m,a,t,e)

int begin()

{

printf("HELLO");

}

output:::::

HELLO

The TRICK::::::::

 Here we r using preprocessor directive #define with arguments to give  an impression that the program runs without main.But in reality it runs with a hidden main function

The ## is called token merging operator.So the logic is when u pass  (s,t,u,m,pe,d ) as arguments to decode(2nd line)  it merges the 4th ,1st,3rd and 2nd character which thus converts decode(a,n,i,m,a,t,e) into main which again replaces begin with main.

Hope u enjoyed it.