题解 | #查找输入整数二进制中1的个数#

function fn(num){
    var count = 0
    while(num != 0){
        if(num%2 == 1){
            count++
            num = Math.floor(num/2)
        }else{
            num = num/2
        }
    }
    return count
}
while (line = readline()) {
    console.log(fn(line))
}