Постоянные переменные указателя в C ++ [дубликат]

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What is the difference between const int*, const int * const, and int const *?

I know two variations of pointer variables in C++.

Say I have

mystruct{
    int num;
}

Variation 1:

const mystruct* m1; means the member variables in m1 can not be altered, for instance, m1->num = 2 would produce an error.

Variation 2:

mystruct *const m2 = m1; means once m2 is set to point to m1, an error would be produced if you subsequently set m2 =m3.

However, there seems to be a third variation, that I am not certain the property of:

Variation 3:

mystruct const * m3;

What does this mean?

c++ pointers constants

задан Community 23 May 2017 в 12:34

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