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class B{
public:
  virtual void func(){};
};

class D:B{
public:
  void func(){};
};

void main ()
{
  D d;
  B *pb=&d;

  pb->func(); //´ýת»»´úÂë
}

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#include"stdlib.h"
void ContrTwo(char i)
{
char str1[8];
itoa(i,str1,2);
printf("%s",str1);
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