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C/C++培训
达内IT学院
400-111-8989
![](/zhuzhan/images/weixin.jpg)
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class A
{
friend class B;
private :
A(){}
~A(){}
};
class B: virtual public A
{
public :
B()
{}
};
class C : public B
{
public :
C()
{}
};
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class A final
{
public :
A(){}
};
class B : public A // 编译出错
{};
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class A
{
public :
static A* Get_A( int x)
{
return new A(x);
}
static void Delete_A(A* a)
{
delete a;
}
private :
A( int a = 10)
:_a(a)
{}
private :
int _a;
};
int main()
{
A* pa = A::Get_A(9);
A* pb = A::Get_A(7);
return 0;
}
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class A
{
public :
static A Get_A( int x)
{
return A(x);
}
private :
A( int a = 10)
:_a(a)
{}
private :
int _a;
};
int main()
{
A pa = A::Get_A(9);
A pb = A::Get_A(7);
return 0;
}
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