Question: C++ | Write a function to determine whether a positive integer is a perfect number. The main function needs to test this function by using

C++ | Write a function to determine whether a positive integer is a perfect number. The main function needs to test this function by using test cases which represent all possible behaviors of the function. You need to use good design principles including the preconditions and post conditions used by the author.

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1. Organize and support your main points

3. Move smoothly from point to point

5. Develop a strong introduction, a crucial part of all speeches