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標(biāo)題: 【原創(chuàng)】C++ 基礎(chǔ)考考自己，看程序?qū)懗鲚敵?[打印本頁(yè)]

作者: sohu2000000 時(shí)間: 2011-02-17 01:30
標(biāo)題: 【原創(chuàng)】C++ 基礎(chǔ)考考自己，看程序?qū)懗鲚敵?br />class NoVirtualClass
{
public:
NoVirtualClass()
{
   std::cout << " NoVirtualClass " << endl;
}

~NoVirtualClass()
{
   std::cout << " ~NoVirtualClass " << endl;
}
};

class VirtualClass
{
public:
VirtualClass()
{
   std::cout << " VirtualClass " << endl;
}

~VirtualClass()
{
   std::cout << " ~VirtualClass " << endl;
}
};

class subClass: public NoVirtualClass, virtual public VirtualClass
{
public:
subClass()
{
      std::cout << " subClass" << endl;
}

~subClass()
{
      std::cout << " ~subClass" << endl;
}
};

class A
{
public:
A()
{
   std::cout << "A" << endl;
}

~A()
{
   std::cout << "~A" << endl;
}

};

class C
{
public:
C()
{
   std::cout << "C" << endl;
}

~C()
{
   std::cout << "~C" << endl;
}

};

class B: public A
{
public:
B()
{
   std::cout << "B" << endl;
}

~B()
{
   std::cout << "~B" << endl;
}

private:

C c;

};

struct stA
{
stA()
{
   cout << "stA" << endl;
}
};

struct stB : stA
{
stB()
{
   cout << "stB" << endl;
}
};

struct stC
{
stC()
{
   cout << "stC" << endl;
}
};

struct stD: stB
{
stD()
{
   cout << "stD" << endl;
}

};

struct stE
{
struct stA a;
struct stC c;
struct stD d;

stE()
{
   cout << "stE" << endl;
}

};

void funRec(int i)
{
if(i < 5)
{
   funRec(++i);
}

cout << " " << i ;

return;
}

int main(void)
{
subClass sub;

volatile char *pvch = new volatile char[10];
delete pvch;

cout << endl;

B b;

cout << endl;

struct stE e;

cout << endl;

funRec(1);

cout << endl;
cout << endl;

return 0;
}

Output:

  VirtualClass
NoVirtualClass
subClass

A
C
B

stA
stC
stA
stB
stD
stE

5 5 4 3 2

~B
~C
~A
~subClass
~NoVirtualClass
~VirtualClass

劉峰六點(diǎn)評(píng)：

(1) 如果有多個(gè)父類，其中有虛繼承的情況下，不管初始化列表的順序如何，都會(huì)先初始化虛繼承的基類，在初始化非虛繼承的基類
(2)  如果有類中含有類成員，那么順序是(1) 基類 (2) 子類類成員（3）子類

(3)  如果有遞歸調(diào)用，函數(shù)的局部變量不會(huì)隨遞歸調(diào)用的對(duì)局部變量的改變而改變，當(dāng)時(shí)是幾就是幾

作者: wb112200 時(shí)間: 2011-02-17 12:04
{:3_183:} 總結(jié)的不錯(cuò) 贊一個(gè)

作者: 雨過(guò)白鷺洲 時(shí)間: 2011-02-17 13:08
不喜歡玩基礎(chǔ)概念

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