（一）程序代码：
#include<graphics.h>
#define x 600
#define y 300
int main()
{
initgraph(x,y);
SetWindowText(GetHWnd(),"Eaxy X");
setlinecolor(RGB(255,255,0));
circle(x/2,y/2,y/3);
setlinecolor(RGB(255,0,0));
line(x/2-y/3,y/2,x/2 y/3,y/2);
system("pause>nul");
return 0;
}
（二）程序运行结果：
