Abstract Class and Pure Virtual function in C++ -51

Pure virtual function and Abstract Class are related with each other.
It is one of the Important Concept of C++.
A class is made abstract by declaring at least one of its functions as pure virtual function. A pure virtual function is specified by placing "= 0" in its declaration.

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[tho]

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[romaingroux]

There is a tiny mistake at 2'18'': "You have to define that FUNCTION" instead of "class".

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[name]

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[prem]

At 2:19 did you mean "You have to define that function in all... " instead of "You have to define that class in all... " ?

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[gl]

Do we have 2 pointers at 8:56 . One points to m and other points to m and the function or one of them should be erased?

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