填空题
以下程序的执行结果是 【15】 。
#include＜iostream. h＞
class Sample
{
public:
int x:
int y;
void disp()
{
cout＜＜"x="＜＜x＜＜",y="＜＜y＜＜end1;
}
};
void main()
{
int Sample:: ** pc;
Sample s;
pc=& Sample: :x;
s.*pc=10;
pc:=&Sample: :y;
s.*pc=20;
s.disp();
}
【参考答案】
x=10，y＝20
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下列程序的执行结果为 【13】 。#include ＜iostream. h＞class Point{public:Point(double i, double j) { x=i; y=j;}double Area() const { return 0.0;}private:double x, y;};class Rectangle: public Point{public:Rectangle(double i, double j, double k, double 1)double Area() const {return w * h;}private:double w, h;};Rectangle: :Rectangle(double i, double j, double k. double 1): Point(i,j).{w=k, h=1}void fun(Point &s){cout＜＜s. Area()＜＜end1;}void main( ){Rectangle rec(3.0, 5.2, 15.0. 25.0);fun(rec)}