8.8.7. Circles

8.8.7. Circles

8.8.7.圆

Circles are represented by a center point and radius. Values of type circle are specified using any  of the following syntaxes:

圆以圆心和半径表示。circle类型的值以如下语法表示：

 

< ( x , y ) , r >

( ( x , y ) , r )

( x , y ) , r

x , y , r

 

where ( x , y ) is the center point and r is the radius of the circle.

(x,y)为圆心，r为半径。

 

Circles are output using the first syntax.

在输出时，圆以第一种语法展示。