如何在 C# 中声明 c++ 指针

Question

BIRDREADING *bird_data;
bird_data = &frame.reading[i]; 

How to declare such in C#?

update1:

i want To call a C++ DLL/lib or to rewrite in C#. Actually i try to solve my own question on this link. Use a variable directly(data return are same in an array) or with pointer? Try my luck to solve the question after i convert above into c#

Answer 1

In c# you can declare pointers which called as unsafe programming.

Example:

unsafe {
            int iData = 10;
            int* pData = &iData;
            Console.WriteLine("Data is " + iData);
            Console.WriteLine("Address is " + (int)pData );
        }

Check this article: Writing Unsafe code using C#

Answer 2

type* identifier;

It depends, will BIRDREADING be a reference type?

You can't declare pointers to reference types from Pointer Types (C#)

Any of the following types may be a pointer type:
sbyte, byte, short, ushort, int, uint, long, ulong, char, float, double, decimal, or bool.
Any enum type.
Any pointer type.
Any user-defined struct type that contains fields of unmanaged types only.

So for your example, giving that BIRDREADING statisifies the above

BIRDREADING *bird_data;

Also, what do you want to use the pointer for? Are you sure you need a pointer?

Answer 3

If BIRDREADING is a class it is a pointer by definition and you don't need to do anything special:

BIRDREADING bird_data;
bird_data = frame.reading[i];

If it's a struct then getting its poiner depends on the context.