C++ Programming Question:
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What is a dangling pointer in C++?


A dangling pointer arises when you use
the address of an object after
its lifetime is over. This may occur
in situations like returning
addresses of the automatic variables
from a function or using the
address of the memory block after
it is freed. The following
code snippet shows this:

class Sample
int *ptr;
Sample(int i)
ptr = new int(i);

delete ptr;
void PrintVal()
cout << "The value is " << *ptr;

void SomeFunc(Sample x)
cout << "Say i am in someFunc " << endl;

int main()
Sample s1 = 10;

In the above example when PrintVal() function is
called it is called by the pointer that has been
freed by the destructor in SomeFunc.

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