[Solved] C++ inheritance appears class ambiguous solution

The problem

Most of the time, the class names defined by itself conflict with the class names of imported packages. The compiler cannot choose which one to use, and it will report an error.

Workaround (both work)

The same inheritance effect is achieved without changing the current class name.

1. Add namespace

//Original definition of the class:
class People{
...
};

//Definition after adding namespace
namespace Mynamespace{<!-- -->
class People{<!-- -->
...
};
}

//When inheriting
class Student : public Mynamespace::People{
...
};

What is the namespace

2. Define aliases

class People{<!-- -->
...
}MyPeople;

//When inheriting
class Student : public MyPeople{
...
};