l6_1.cpp

《C++程序设计教程》电子教案及例题源码

#include <iostream.h>
#include <string.h>
class CRect
{
private:
	char color[10];
	int left;
	int top;
	int length;
	int width;
public:
	CRect();
	CRect(char *c, int t, int lef, int len, int wid);
	void SetColor(char *c);
	void SetSize(int l=100, int w=100);
	void Move(int t,int l);
	void Draw();
};

CRect::CRect()
{
	strcpy(color, "Black");
	top = 0;
	left = 0;
	length = 0;
	width = 0;
}
CRect::CRect(char *c, int t, int lef, int len, int wid)
{
	strcpy(color, c);
	top = t;
	left = lef;
	length = len;
	width = wid;
}

void CRect::SetColor(char *c)
{
	strcpy(color, c);
}
void CRect::SetSize(int l, int w)
{
	length=l;
	width = w;
}
void CRect::Move(int t,int l)
{
	top = t;
	left = l;
}
void CRect::Draw()
{
	cout << "矩形左上角坐标为(" << left << "," << top << ")" << endl;
	cout << "矩形长和宽分别为" << length << "," << width << endl;
	cout << "矩形的颜色是" << color << endl;
}

void main()
{
	CRect r;                      //定义CRect类的对象r
	r.SetColor("Red");
	r.Move(10,20);
	r.SetSize(100,200);
	r.Draw();
	r.Move(50,50);
	r.SetColor("Blue");
	r.Draw();
}