73. To swap nibble of a given char data ( Method 1 )

 

#include<stdio.h>

void main()

{

        char ch,i,j,n1,n2;

        printf("To swap nibble of a given char data \n");

        printf("Enter a number : ");

        scanf("%d",&ch);

       

        for(i=7;i>=0;i--)

        printf("%d",ch>>i&1);

        printf("\n");

       

        for(i=0,j=4;i<=3;i++,j++)

        {

            n1=ch>>i&1;

            n2=ch>>j&1;

            if(n1!=n2)

            {

                ch=ch^(1<<i);

                ch=ch^(1<<j);

            }

        }

       

        for(i=7;i>=0;i--)

        printf("%d",ch>>i&1);

        printf("\n");

}