以下C代码将绘制一个矩形。我知道如何绘制椭圆,但是如何在这个矩形中绘制一个椭圆?
#include<graphics.h>
#include<conio.h>
main()
{
int gd = DETECT, gm;
initgraph(&gd, &gm, "C:\\TC\\BGI");
rectangle(100,100,200,200);
getch();
closegraph();
return 0;
}
答案 0 :(得分:1)
假设您使用ellipse
中的graphics.h
function,则可以执行以下操作:
int left = 100;
int right = 200;
int top = 100;
int bottom = 200;
rectangle(left, top, right, bottom);
int x = (left + right) / 2;
int y = (top + bottom) / 2;
int start = 0;
int end = 360;
int xrad = (right - left) / 2;
int yrad = (bottom - top) / 2;
ellipse(x, y, start, end, xrad, yrad);