仔细阅读程序,在题后写出其运行结果。#include #includeusing namespace std;class Box{public:Box(int w=10,int h=10,int len=10);int volume();private:int height;int width;int length;};Box::Box(int w,int h,int len){height=h;width=w;length=len;}int Box::volume(){return(height*width*length);}int main(){Box box1;cout<