// inheritance example 
// constructors and derived classes
#include<iostream.h>
#include<conio.h>
class mother
{
  public :
  mother()
  {
   cout<<"mother:no parameters\n";
  }
  mother (int a)
  {
   cout<<"mother:int parameter\n";
  }
};

class daughter:public mother
{
 public:
 daughter (int a)
 {
  cout<<"daughter:int parameter\n\n";
 }
};

class son:public mother
{
public:
 son(int a) : mother (a)
 {
  cout<<"son:int parameter\n\n";
 }
};

void main()
{
clrscr();
daughter d1(0);
son s1(0);
getch();
}

/* 
----OUTPUT----
mother: no parameters
daughter: int parameter
mother: int parameter
son: int parameter
*/