//abc.cpp  -- by tsaiwn@csie.nctu.edu.tw
//g++ abc.cpp; ./a.out
// test Inheritance with constructor
#include <iostream>
using namespace std;
class A {
  public:
   A( ) { cout << "a1 "; }
   A(int x) { cout << "a2 "<< x << " "; }
  ~A( ) { cout << " a-dying "; }
};
class B: public A {
  public:
   ~B( ) { cout << " b-dying "; }
   B( ) { cout << "b1 "; }
   B(int nnn) : A(nnn+5) { cout << "b2 "; }
   B(double nnn) { cout << "b3 "; }
};
void test( ) {
  B x(12345); cout << "\n in test ...";
}
A x; A y(38);
int main( ) {
   cout << "\n===\n";
   B x;
   B y(3388); cout << "\n";
   B zz(123.456); cout << "\n===\n";
   test( );
   cout << "=== ===\n";
}