3_9.c

浙大《C语言设计基础课程设计》中的例程 有些比较好的代码！

/*------例程3-9-------*/
#include <graphics.h>
#include <conio.h>
#include <math.h>
#define PI 3.141593
int main()
{
	int graphdriver=VGA;
	int graphmode=VGAHI;
	double a=0,b;
        int x0=340,y0=240,r=100,i,x,y;
    
        initgraph(&graphdriver,&graphmode,"");
	cleardevice();
        setlinestyle(DASHED_LINE,0,3);

	setcolor(EGA_RED);
	for(i=0;i<6;i++,a+=60)
	{
	     b=a*PI/180;
             x=x0+r*cos(b);
             y=y0+r*sin(b);
             arc(x,y,120-i*60,240-i*60,r);
        }

        setcolor(EGA_YELLOW);
	circle(x0,y0,100);

  	getch();
	closegraph();
        return 0;
}
/*------例程3-9结束-------*/