c언어 문법좀 알려주세요...

//#include <WinDef.h>
 
typedef unsigned short      WORD;
typedef WORD                *PWORD;
 
//PWORD
//A pointer to a WORD .
//This type is declared in WinDef.h as follows :
//typedef WORD *PWORD;
 
int main()
{
	PWORD p;
 
	int n;
	n = sizeof(WORD);
	printf("WORD %d\n", n);		//32비트 : 2 - 64비트 : 2
 
	n = sizeof(PWORD);
	printf("PWORD %d\n", n);	//32비트 : 4 - 64비트 : 8
 
    return 0;
}