Macro to exchange the nibbles

Can anybody provide me a code for
Macro to exchange the nibbles??

regards
Prakash

hi..frnd


here i have written one program to exchange the byte for 2 byte variable..
from this you can derive for the nibble:

#include<conio.h>
#include<stdio.h>


void swapNibble(int);


void main()
{

short int x;

printf("sizeof int = %d",sizeof(x));

printf("Enter the value:");
scanf("%d",&x);

swapNibble(x);
getch();


}


void swapNibble(int var)

{
var = var << 8;

printf("\nvalue after shifting the var is = %d",var);

}