C++选择题2.doc

.1. 在语句cindata;中，cin是(类与对象3)C+的关键字类名对象名函数名2. 有如下程序：#include using namespace std;class Complexdouble re, im;public:Complex(double r, double i) : re(r), im(i) double real() const return re; double image() const return im; Complex& operator += (Complex a)re += a.re;im += a.im;return *this;ostream& operator (ostream& s, const Complex& z)return s(z.real(),z.image();int main()Com