Virtual base class C++ Program to display the pattern like pyramid using the alphabet

Write a C++ Program to display the pattern like pyramid using the alphabet by using the virtual base class in Object Oriented Programming.

Output

C++ Program to display the pattern like pyramid using the alphabet.

FAQ

C++ program to print pyramid pattern by using the virtual base class in OOP.
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C++ program to print patterns of alphabets by using the virtual base class in OOP .
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write a program in c to make such a pattern like a pyramid with alphabets by using the virtual base class in OOP.