C/C++ Ö¸Ïò×ÓÀà¶ÔÏóµÄ»ùÀàÖ¸Õë

ÓÐÈçϳÌÐò£º
//-----------------
class A
{
public:
A()
{
printf( "base A\r\n" );
}
virtual ~A()
{
printf( "base ~A\r\n" );
}
public:
virtual void VirtualFunc()
{
printf( "base VirtualFunc\r\n" );
};
void Func()
{
printf( "base Func\r\n" );
}
void F1()
{
printf( "base F1\r\n" );
}
protected:
private:
};
class B : public A
{
public:
B()
{
printf( "derive B\r\n" );
}
~B()
{
printf( "derive ~B\r\n" );
}
public:
virtual void VirtualFunc()
{
printf( "derive VirtualFunc\r\n" );
};
void Func()
{
printf( "derive Func\r\n" );
}
void G1()
{
printf( "derive G1\r\n" );
}
protected:
private:
};
ÔÚÕâÁ½¸öÀàÖУ¬×ÓÀàB ÖØдÁË »ùÀàµÄ Á½¸öº¯Êý£¬Ò»¸öÊÇÐ麯Êý£¬Ò»¸ö²»ÊÇÐ麯Êý¡£
1. Èç¹ûmainº¯ÊýÈçÏ£º
int main(int argc, int* argv[])
{
A* pA = new B;  //»ùÀàÖ¸ÕëÖ¸Ïò×ÓÀà¶ÔÏó
pA->VirtualFunc();
pA->Func();
//pA->G1(); //³ö´í£º'G1' : is not a member of 'A'
delete( pA );
system("pause");
return 0;
}
ÔËÐнá¹ûÈçÏ£º
base A
derive B
derive VirtualFunc
base Func
derive ~B
base ~A
Ò²¾ÍÊÇ˵£¬Èç¹û×ÓÀàÖØдÁË»ùÀàµÄÐ麯Êý£¬ÄÇô¸ÃÖ¸Õ루»ùÀàÖ¸Õ룬µ«Ö¸ÏòÅÉÉúÀà¶ÔÏ󣩽«µ÷ÓÃ×ÓÀàµÄº¯Êý£»
¼´Ê¹×ÓÀàÖØдÁË×ÓÀàµÄ·ÇÐ麯Êý£¬¸ÃÖ¸ÕëÒ²²»»áµ÷ÓÃ×ÓÀàµÄº¯Êý¡£
2.
Èç¹ûmain º¯ÊýÈçÏ£º
int main(int argc, int* argv[])
{
B *pB = new B; //×ÓÀàÖ¸ÕëÖ¸Ïò×ÓÀà¶ÔÏó
pB->VirtualFunc();
pB->Func();
//pB->F1(); //ÕýÈ·£¬Êä³ö£ºbase F1¡£Çë×¢Ò⣺BÀàÊǹ«Óм̳ÐAÀà¡£¾ßÌå²Î¼û£ºC++µÄÈýÖּ̳з½Ê½
delete( pB );
system("pause");
return 0;
}
ÔòÔËÐнá¹ûÈçÏ£º
base A
derive B
derive VirtualFunc
derive Func
derive ~B
base ~A
¼´Èç¹ûÓÃ×ÓÀàÖ¸ÕëÖ¸Ïò×ÓÀà¶ÔÏó£¬Ôò¶¼µ÷ÓÃ×ÓÀàµÄº¯Êý¡£