graphdemo.cpp

教材例子

//程序GRAPHDEMO.CPP(7.2.8)	功能：演示基本图形元素类的用法 
#include "basgraph.h"
#include <conio.h>
void main()
{
	int graphdriver=DETECT, graphmode;
	CIRCLE circle(100, 200, 50);
	initgraph(&graphdriver, &graphmode, " ");
	circle.show();
	getch();
	circle.move_to(200, 250);
	getch();
	circle.expand(50);
	getch();
	circle.expand(50);
	getch();
	circle.contract(65);
	getch();
	circle.contract(65);
	getch();
	closegraph();

	LOCATION loc(1,2);
	POINT point(1,2);
	CIRCLE cir(1,2,1);
	loc=point;
	loc=cir;
	point=cir;
	//circle=point;
	//circle=loc;
	//point=loc;

	LOCATION *loc_ptr;
	POINT *point_ptr;
	CIRCLE *cir_ptr;
	loc_ptr=point_ptr;		loc_ptr=&point;
	loc_ptr=cir_ptr;		loc_ptr=&cir;
	point_ptr=cir_ptr;		point_ptr=&cir;
	//cir_ptr=loc_ptr;
	//cir_ptr=point_ptr;
	//point_ptr=loc_ptr;

	
}