4:25pm ccbsd2:abc/> cat -n abc.cpp
  1 //abc.cpp  -- by tsaiwn@csie.nctu.edu.tw
  2 //g++ abc.cpp; ./a.out
  3 // test Inheritance with constructor
  4 #include <iostream>
  5 using namespace std;
  6 class A {
  7   public:
  8    A( ) { cout << "a1 "; }
  9    A(int x) { cout << "a2 "<< x << " "; }
 10   ~A( ) { cout << " a-dying "; }
 11 };
 12 class B: public A {
 13   public:
 14    ~B( ) { cout << " b-dying "; }
 15    B( ) { cout << "b1 "; }
 16    B(int nnn) : A(nnn+5) { cout << "b2 "; }
 17    B(double nnn) { cout << "b3 "; }
 18 };
 19 void test( ) {
 20   B x(12345); cout << "\n in test ...";
 21 }
 22 A x; A y(38);
 23 int main( ) {
 24    cout << "\n===\n";
 25    B x;
 26    B y(3388); cout << "\n";
 27    B zz(123.456); cout << "\n===\n";
 28    test( );
 29    cout << "=== ===\n";
 30 }
 31 

4:25pm ccbsd2:abc/> g++ abc.cpp
4:25pm ccbsd2:abc/> ./a.out
a1 a2 38
===
a1 b1 a2 3393 b2
a1 b3
===
a2 12350 b2
 in test ... b-dying  a-dying === ===
 b-dying  a-dying  b-dying  a-dying  b-dying  a-dying  a-dying  a-dying 4:25pm c                     
4:25pm ccbsd2:abc/> 



Run on PC under DEV-CPP

D:\Documents and Settings\user.CCCS>
D:\Documents and Settings\user.CCCS>g++ abc.cpp

D:\Documents and Settings\user.CCCS>a
a1 a2 38
===
a1 b1 a2 3393 b2
a1 b3
===
a2 12350 b2
 in test ... b-dying  a-dying === ===
 b-dying  a-dying  b-dying  a-dying  b-dying  a-dying  a-dying  a-dying
D:\Documents and Settings\user.CCCS>