c++ - 为什么此代码在提到的位置崩溃？

您能否详细说明为什么此代码在上述位置崩溃？我对此有些困惑。我猜想它与sizeof(int)有关，但是我不确定。有人可以解释吗？

class Base
{
public:
    virtual void SomeFunction()
    {
        printf("test base\n");
    }

    int m_j;
};

class Derived : public Base {
public:
   void SomeFunction()
   {
       printf("test derive\n");
   }

private:
   int m_i;
};

void MyWonderfulCode(Base baseArray[])
{
   baseArray[0].SomeFunction();  //Works fine
   baseArray[1].SomeFunction();  //Crashes because of invalid vfptr
   baseArray[2].SomeFunction();  //Crashes because of invalid vfptr
   baseArray[3].SomeFunction();  //Works fine
   baseArray[4].SomeFunction();  //Crashes because of invalid vfptr
   baseArray[5].SomeFunction();  //Crashes because of invalid vfptr
   baseArray[6].SomeFunction();  //Works fine
   baseArray[7].SomeFunction();  //Crashes because of invalid vfptr
   baseArray[8].SomeFunction();  //Crashes because of invalid vfptr
   baseArray[9].SomeFunction();  //Works fine
}
int _tmain(int argc, TCHAR* argv[])
{
   Derived derivedArray[10];
   MyWonderfulCode(derivedArray);
   return 0;
}

最佳答案

引用此常见问题解答:Is array of derived same as as array of base?

关于c++ - 为什么此代码在提到的位置崩溃？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/1043402/