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C Program to find the Highest Bit Set for any given Integer



C Program to find the Highest Bit Set for any given Integer

    #include <stdio.h>

    #define j_bits sizeof(int)*8

    int highest_bit_set(int);

    void display(int);

    int i = j_bits;

    void main()

    {

        int j, pos;

        printf("\nenter the number:");

        scanf("%d", &j);

        display(j);

        pos = highest_bit_set(j);

        printf("\nthe position of the highest bit set is %d", pos);

    }

    /* returns the position */

    int highest_bit_set(int j)

    {

        int count = 0;

        while (j >> 1 != 0)

        {

            count++;

            j = j >> 1;

        }

        return(count);

    }

    /* displays the number in binary representation */

    void display(int j)

    {

        int c;

        c = j & 1;

        if (i > 0)

        {

            i--;

            display(j >> 1);

        }

        printf("%d", c);

    }

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