71. To reverse binary of a number (Method 1)

 

#include<stdio.h>

void main()

{

        int num,i,j,n1,n2;

        printf("To reverse binary of a number \n");

        printf("Enter a number : ");

        scanf("%d",&num);

       

        for(i=31;i>=0;i--)

         printf("%d",num>>i&1);

         printf("\n");

        

        for(i=0,j=31;i<j;i++,j--)

        {

            n1=num>>i&1;

            n2=num>>j&1;

            if(n1!=n2)

            {

                num=num^(1<<i);

                num=num^(1<<j);

            }

        }

       

         for(i=31;i>=0;i--)

         printf("%d",num>>i&1);

        printf("\n");

}