简单示例，利用QTcreator画圆，固定圆心，圆的半径、圆心可调节，并显示坐标-A simple example, the use of QTcreator Circle, a fixed center, the radius of the circle, the center can be adjusted, and the display coordinate

这个程序为经典的圆弧插补程序，可以走直线和弧线，设定好圆心坐标，圆弧的起点坐标和终点坐标，就可以走圆弧，非常简单，适合于初学者练习。-This program for a classic circular interpolation program, you can walk a straight line and arc, and set the center coordinates of the arc starting point coordinates and end coordinat

LCD显示图形：在XY坐标系上画圆，并可以设置圆心的坐标 -LCD display graphics: draw a circle on the XY coordinate system, and you can set the center coordinates