Declaring readonly variables on a C++ class or struct

Question

I\'m coming to C++ from C# and const-correctness is still new to me. In C# I could declare a property like this:

class Type 
{
    public readonly int x;
            


        

Answer 1

You can initialize class const members with constructor. If you need add some other logic in constructor, but in .cpp file not in .h, you can create a private method and call it in constructor.

File.h

    class Example 
    {
    private:
        const int constantMember1;
        const int constantMember2;
        const int constantMember3;
        void Init();
    public:
        Example(int a, int b) :constantMember1(a), constantMember2(b), constantMember3(a + b) {
           //Initialization
           Init();
        };
    };

File.cpp

void Init()
{
//Some Logic intialization
}