Shulou(Shulou.com)06/01 Report--

Today, I would like to share with you the relevant knowledge points of PHP polymorphism and virtual function instance analysis. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look.

Theoretical exercises

The execution results of the following programs are given.

# include class A {public: virtual void f () / / Virtual function {cout

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