Expert: vijayan - 4/14/2010

Question
#include<iostream>
using namespace std;
int a(int,int);
class p
{
public:
  int i;
  
  p()
  {
     
     cout<<"constructing!!";
  }

  
  ~p(void)
  {
     cout<<"Destructing!....pppp..";
  }
};

class w
{
public:
  int y;
  w(void)
  {
     cout<<"constructing!!";
  }

  ~w(void)
  {
     cout<<"Destructing!....the WWW..";
  }
};

int main()
{
  p ob(p,p,w);
  w ob1;
  
  
  

  return 0;
}
  is there any error?can we send in the declaration any number of object i.e ob(p,p,......)!why is this happening can you tell me?

Answer
   p ob(p,p,w);

Has more than one error.

To start with, p and w are classes (types), not objects (variables).

Even if we had written

   p ob(34,"hello",4.3);

There is an error. The only constructor in class p does not take any arguments.
There is no constructor which can be invoked with three arguments.