c语言

#include<stdio.h>

int main()
{
    int iNumber;

    while (scanf("%d", &iNumber) != EOF){
        int iCount = 0;
        int i = 0x1;
        do {
            if(iNumber & i) {
                iCount++;
            }
        } while((iNumber = iNumber >> 1 )!= 0);

    printf("%d\n", iCount);
    }

    return 0;
}