/*

* C Program to next higher value of n with same 1's
*/
#define NUM_BITS_INT 32
#include <stdio.h>
int newcount(int);

void main()
{
    int count1 = 0, k = 0, j, t, n, bit, i = 1, count = 0;
    printf("Enter a number : ");
    scanf("%d", &n);
    t = n;
    while(t != 0)
        {
            bit = t & 0x80000000;
            if (bit == -0x80000000)
                {
                    bit = 1;
                }
            if (bit == 1)
                count++;
            t = t << 1;
        }
    for (k = n + 1;; k++)
        {
            count1 = newcount(k);
            if (count1 == count)
                {
                    printf("The next highest number is : %d ", k);
                    break;
                }
        }
}

/* To count the no. of 1's in the no. */
int newcount(int k)
{
    int bit, count = 0;
    while (k != 0)
        {
            bit = k & 0x80000000;
            if (bit == -0x80000000)
                {
                    bit = 1;
                }
            if (bit == 1)
                count++;
            k = k << 1;
        }
    return(count);
}


Enter a number : 128
The next highest number is : 256
Enter a number : 127
The next highest number is : 191
Enter a number : 6
The next highest number is : 9
Enter a number : 12
The next highest number is : 17