编写一个程序计算正方形、球体和圆柱体的表面积和体积。
Write a program to calculate square , sphere and cylinder surface area and volume .
两圆柱体正交相贯的体积、质心和转动惯量
The volume , center of mass and moment of inertia of two circular cylinders intersected perpendicularly
圆柱体的体积