c++创建长方体类，计算体积与表面积

创建一个长方体类，数据成员至少包括长、宽、高，分别命名为length width height.要求用成员函数完成如下功能：
(1)从键盘上输入长、宽、高。
(2)计算长方体的体积与表面积。
(3)输出长方体的体积与表面积。
例：
1.1 2.2 3.3
area=26.62,volume=7.986
请注意；main()函数必须按如下所示编写：
int main()
｛
Cuboid cc; float a,b,c;
cin>>a>b>c;
cc. set value(a,b,c);
cc. count area();
cc. count volume();
cc. show();
return 0;
｝

#include<iostream>
using namespace std;
class Cuboid
{
public:
    void setvalue(float a, float b, float c)
    {
        this->length = a;
        this->width = b;
        this->height = c;
    }
    void countarea()
    {
        this->area = 2 * (this->height*this->length + this->height*this->width + this->length*this->width);
    }
    void countvolume()
    {
        this->volume = this->height*this->length*this->width;
    }
    void show()
    {
        cout << "area=" << this->area << "," << "volume=" << this->volume;
    }
private:
    float length;
    float width;
    float height;
    float area;
    float volume;
};
int main()
{
    Cuboid cc; float a, b, c;
    cin >> a >> b >> c;
    cc.setvalue(a, b, c);
    cc.countarea();
    cc.countvolume();
    cc.show();
    return 0;
}