小编fat*_*ipp的帖子

我编写了一个简单的C++类示例,其中包含1个非参数构造函数,1个参数构造函数,2个复制构造函数,1个赋值运算符和1个加号运算符.

class Complex {
protected:
    float real, img;
public:
    Complex () : real(0), img(0) {
        cout << "Default constructor\n";
    }

    Complex (float a, float b) {
        cout << "Param constructor" << a << " " << b << endl;
        real = a;
        img = b;
    }

    // 2 copy constructors
    Complex( const Complex& other ) {
        cout << "1st copy constructor " << other.real << " " << other.img << endl;
        real = other.real;
        img = other.img;
    }

    Complex( Complex& …

我坚持这个问题:假设我们有32位整数,写一个C函数来计算从左边开始的连续1位的数量.例如:

leftCount(0xFF000000) = 8
leftCount(0x0FFFFFFF) = 0 (because the number starts with 0)
leftCount(-1) = 32

在函数中,我被允许使用逻辑运算符,如!〜&^ | + << >>

不允许循环和条件结构.

谢谢