自己封装一个矩形类(Rect),拥有私有属性:宽度(width)、高度(height),
定义公有成员函数:
初始化函数:void init(int w, int h)
更改宽度的函数:set_w(int w)
更改高度的函数:set_h(int h)
输出该矩形的周长和面积函数:void show()
代码:
#include <iostream>using namespace std;class Rect
{
private:int width;int height;
public:void init(int w, int h);void set_w(int w);void set_h(int h);void show();
};void Rect::init(int w, int h)
{this->width = w;this->height = h;
}void Rect::set_w(int w)
{this->width = w;
}void Rect::set_h(int h)
{this->height = h;
}void Rect::show()
{cout << "周长为:" << width+height << endl;cout << "面积为:" << width*height << endl;
}int main()
{int height,width;Rect s1;s1.init(5,10);cout << "初始的周长和面积:" << endl;s1.show();cout << "请输入要更改的长和宽:";cin >> height >> width;s1.set_h(height);s1.set_w(width);s1.show();return 0;
}
运行结果:
思维导图: