单选题

求下面函数的返回值 { int countx = 0...

Question

求下面函数的返回值

{ 
    int countx = 0 
    while(x) 
    { 
        countx ++ 
        x = x&(x-1) 
    } 
    return countx 
}

A. 16

B. 8

C. 2

D. 4