派生类的构造函数与析构函数

*P L6b~i0#include<iostream>51Testing软件测试网L/SX~&qZ
using namespace std;51Testing软件测试网?}?5Fra&K f@
|4J
class B{
6Va.Ogtr0public:51Testing软件测试网#Xe"s&Dv z6}
  B(int n)
-HP.`H B0  {cout<<"constructing B class\n";51Testing软件测试网Kl,deeJ2pM
   i=n;
*T%^%CocxB2W0  }51Testing软件测试网B*U i? M@qQ-h
  ~B()51Testing软件测试网 kbrVYo7W8Dzl9v%m
  {
}
@
P A&|S g ~o0    cout<<"destructing B class\n";
6Ic_B0uf P\0  }
JY$lI*Ux"N5g%s0  void dispB()
_ Y!Y/O a r9c0  {
)k\8`&kg0G)T0    cout<<"i="<<i<<endl;
}'Ih4J#XVIJ0  }51Testing软件测试网Ng$I+?sEAD^
private:
T9I[ u/\$G?U0 int i;51Testing软件测试网B7M&u,F{,H~0Sk
};
+D
f X'P!C0class C:public B{51Testing软件测试网H+pj,v-i&g
public:51Testing软件测试网v5kO5z3R?
 C(int n,int m):B(m)51Testing软件测试网YE"c'_y_
 {51Testing软件测试网 K{1}o5Zm mg
  cout<<"constructing C class\n";51Testing软件测试网E EWM Ux
  j=n;51Testing软件测试网+l2]'KPz{U
 }51Testing软件测试网a#TXP-HRa
 ~C()51Testing软件测试网 o!Z&im9C ]
 {
M.P jQ@5W,P0       cout<<"destructing C class\n";    
,o3Ln$j^*z0 }
3_Vv"l)c%v9\0 dispC()51Testing软件测试网L1u C1P(Hp
 {
O)[(g]1JX0  dispB();51Testing软件测试网5w6kEK"M OB
  cout<<"j="<<j<<endl;51Testing软件测试网m)e!fUx:J
 }
taC1vLGs0private:51Testing软件测试网JZ@:AF3l _
 int j;

%M7u:T*@!ER
C(v$k*C0};
\ u(n&Bp0int main()
SRN3A[+X+v9K[U0{
^p"^O"[KE0 B b(10);
w'\?/hr4z0 b.dispB();
iod6K/fCG0 cout<<"c.dispB()============="<<endl;
:m%_aZp gU(c0 C c(50,60);51Testing软件测试网 I
{"VZ*V\
 c.dispB();51Testing软件测试网f:soK]/o
 cout<<"c.dispC()=============="<<endl;
+e%w#}z)@ f0 c.dispC();51Testing软件测试网z-q4Y'~ m
x,wj
 return 0;51Testing软件测试网0z%R+e+jOB
}