#include<iostream> using namespace std; class Box { public:     Box(double lengthvalue=1.0,double breadthvalue=1.0,double heightvalue=1.0);     double volume();     int comparevolume(Box& otherbox); private:     double length;     double breadth;     double height; }; Box::Box(double lengthvalue,double breadthvalue,double heightvalue):length(lengthvalue), breadth(breadthvalue),height(heightvalue) {     cout<<endl         <<"constructor called"         <<endl;    length=lengthvalue;    breadth=breadthvalue;    height=heightvalue; } double Box::volume() {     return length*height*breadth; } int Box::comparevolume(Box& otherbox) {     if(otherbox.volume()>this->volume())         return 0;     else return 1; } int main() {     Box firstbox(1.0,2.0,3.0);     Box secondbox;     Box* pthirdbox=new Box(0.1,2.5,3.5);     cout<<endl<<"volume of first box is:"         <<firstbox.volume()<<endl;     cout<<"volume of second box is:"         <<secondbox.volume()<<endl;     cout<<"volume of third box is:"         <<pthirdbox->volume()<<endl;     if(firstbox.comparevolume(secondbox))     {         if(firstbox.comparevolume(*pthirdbox))         {             if(secondbox.comparevolume(*pthirdbox))             {             cout<<endl             <<"the largest_volume box is the first box."             <<endl;             cout<<"the second_volume box is the second box."                 <<endl;             cout<<"the third_volume box is the the third box."                 <<endl;             }             else             {              cout<<endl             <<"the largest_volume box is the first box."             <<endl;             cout<<"the second_volume box is the third box."                 <<endl;             cout<<"the third_volume box is the the second box."                 <<endl;             }         }         else         {             if(pthirdbox->comparevolume(secondbox))             {             cout<<"the largest_volume box is the third box."<<endl;             cout<<"the second_volume box is the first box."<<endl;             cout<<"the third_volume box is the second box."<<endl;             }             else             {                 cout<<"the largest_volume box is the third box."<<endl;             cout<<"the second_volume box is the second box."<<endl;             cout<<"the third_volume box is the first box."<<endl;               }         }     }     else     {          if(firstbox.comparevolume(*pthirdbox))          {                 cout<<endl             <<"the largest_volume box is the second box."             <<endl;             cout<<"the second_volume box is the first box."                 <<endl;             cout<<"the third_volume box is the the third box."                 <<endl;          }         else         {             if(pthirdbox->comparevolume(secondbox))             {             cout<<"the largest_volume box is the third box."<<endl;             cout<<"the second_volume box is the second box."<<endl;             cout<<"the third_volume box is the first box."<<endl;             }             else             {                 cout<<"the largest_volume box is the second box."<<endl;             cout<<"the second_volume box is the third box."<<endl;             cout<<"the third_volume box is the first box."<<endl;               }         }     }     return 0; }

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