Endianness and the Union

#include <stdio.h> 
int main( ) 
{
	// union declaration
	union a 
	{
		int i ;
		char ch[ 4 ] ; 
	} ;
	// Declares union variable
	union a z ; 
	// Assign value to union member
	z.i = 512 ;  
	// Print values of union members
	printf ( "%d %d %d %d %d\n", z.i, z.ch[ 0 ], z.ch[ 1 ] , z.ch[ 2 ], z.ch[ 3 ] ) ; 
}