编写一个一个程序，在屏幕上出现一个圆心沿正弦曲线轨迹移动的实心圆，而且，每隔四分之一周期，圆的填充色和圆的周边颜色都发发生了变化(颜色自己选取)，同时，圆的半径在四分之一周期之内由正弦曲线幅值的0.2倍至0.6倍线性增长。-procedures appeared on the screen in the center of a circle along a sinusoidal curve track the movement of a solid round, but every fourt

在对话框中输入两个圆的圆心和半径，判断两圆之间的关系。-In the dialog box, enter the two circle s center and radius, to determine the relationship between the two circles.

vb program to calculate tool nose radius

计算圆的面积和周长的界面QT程序,输入圆的半径，可自动显示圆的面积和周长大小-Calculate the area of the circle and the interface QT of the perimeter, enter the radius of the circle, and automatically show the area and the circumference of the circle