//上面那位是正方體,不是正四面體
#include
#include
using namespace std;
class CRegulartetrahedron
{
public:
CRegulartetrahedron():edge(0),height(0){}
CRegulartetrahedron(double x):edge(x)
{
height=sqrt(6.0)/3.0*edge;
}
double GetVolume()//體積
{
return 1.0/2.0*edge*sqrt(3.0)/2.0*edge*height*1.0/3.0;//底面積乘以高除以三分之一
}
double GetSuperficialArea()//表面積
{
return 4.0*1.0/2.0*edge*sqrt(3.0)/2.0*edge;//四個面積之和
}
private:
double edge;//邊長
double height;
};
void main()
{
CRegulartetrahedron RT(2);
cout