150. Design a function to count how many numbers are set in a given input function.

 

#include<stdio.h>

int set_bits(int);

int num,r;

void main()

{

        printf("Enter a number : ");

        scanf("%d",&num);

        r=set_bits(num);

        printf("%d",r);

        printf("\n");

 

}

int set_bits(int num)

{

        int pos,c=0;

        for(pos=0;pos<=31;pos++)

                if((num>>pos&1)==1)

                        c++;

return c;

}