单项选择题
下面程序的运行结果是( )。
#include<iostream>
using namespace std;
class A
int a;
public:
A()a=0;1
A(int a
A.a )
a=aa;
virtual void show()
cout<<a>>"";
;
class B:public A
int b:
public:
B()b=0:
B(int b
B.
b=bb;
void show()
cout<<b>>" ";
;
class C:public B
int c;
public:
C(int c
C.
c