#include <iostream>
using namespace std;
class chang
{
public:
    chang(int h ,int w,int l)
    {
        height=h;
        wide=w;
        lon=l;
    }        
    int volume();
   
private:
    int height;
    int wide;
    int lon;

};
   
int chang::volume(4,4,5)
{
        return (height*wide*lon);
}
   

int main()
{
    chang v1;
    vi.volume;
    cout <<"the volume is :"<<v1.volume<<endle
        return 0;
}

长宽高，求体积

谢了哈