题解 | #查找输入整数二进制中1的个数#

let str;
while(str = readline()) {
    let str1 = parseInt(str).toString(2);
    let arr1 = str1.split('');
    let count = 0;
    arr1.forEach(i=>{
        if(i == '1') {
            count++;
        }
    })
    console.log(count);
}