.直接用公式呗……//计算圆柱体表面积,r是半径,h是高double CylinderArea(double r,double h){return 3.14159*r*r*2+2*3.14159*r*h;}//计算圆柱体体积double CylinderVolume(double r,double h){return 3.14159*r*r*...