题目内容

在类定义中，类说明以关键字class开始，其后跟_，它必须是一个有效的C++标识符。类说明的内容用花括号括起来，称为___。

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实现类对象初始化任务的是该类的______________。

写出下列运行结果#includeusing namespace std;class point{private:int x1, x2;public:point(int x, int y) { x1 = x; x2 = y; }int x_cord() { return x1; }int y_cord() { return x2; }};int main(){point data(5, 6);cout << data.x_cord() << " " << data.y_cord() << endl;return 0;}

写出下列程序的运行结果#include using namespace std;class Complex{public:Complex() { real = 0; imag = 0; }Complex(double r, double i) { real = r; imag = i; }Complex operator+(Complex& c2);void display();private:double real;double imag;};Complex Complex::operator+(Complex & c2){Complex c;c.real = real + c2.real;c.imag = imag + c2.imag;return c;}void Complex::display(){cout << "(" << real << "," << imag << "i)" << endl;}int main(){Complex c1(3, 4), c2(5, -10), c3;c3 = c1 + c2;//运算符+用于复数运算cout << "c1 = "; c1.display();cout << "c2 = "; c2.display();cout << "c1 + c2 = "; c3.display();return 0;}

( )又称“三才碗”，一式三件，下有托，中有碗，上置盖。

A. 紫砂壶
B. 盖碗
C. 兔毫盏
D. 茶盅