40 lines
641 B
C++
40 lines
641 B
C++
// 创建一个基类 Shape，其中包含一个纯虚函数 draw() ，用于绘制形状。从 Shape 派生出 Rectangle 类和 Circle 类，分别实现不同形状的绘制方法
|
|
#include <iostream>
|
|
#include <cstring>
|
|
#include <cstdlib>
|
|
|
|
using namespace std;
|
|
|
|
class Shape
|
|
{
|
|
public:
|
|
virtual void draw() = 0;
|
|
};
|
|
|
|
class Rectangle : public Shape
|
|
{
|
|
public:
|
|
void draw()
|
|
{
|
|
cout << "Rectangle" << endl;
|
|
}
|
|
};
|
|
|
|
class Circle : public Shape
|
|
{
|
|
public:
|
|
void draw()
|
|
{
|
|
cout << "Circle" << endl;
|
|
}
|
|
};
|
|
|
|
int main()
|
|
{
|
|
Shape *p = new Rectangle;
|
|
p->draw();
|
|
p = new Circle;
|
|
p->draw();
|
|
return 0;
|
|
}
|