C++ List equivalent with C# List

Question

I have some simple question. I am trying to create a List in C++ that equivalent with C# List. My purpose is to creating a List that can contain some offset that I have create. So at finally my COffset will contain with 200 list of my offset like this

1.{ 0xAC, 0x10, 0x8, 0x4 }

2.{ 0xAC, 0x10, 0x8, 0x8, 0x4 }

3.{ 0xAC, 0x10, 0x8, 0x8, 0x8, 0x4 }
.
.
.
200.{ 0xAC, 0x10, 0x8, ........., 0x8, 0x4}

My C# Code:

 private int[] CRead;
 private int[] CCheck = { 0xAC, 0x10, 0x8, 0x4 };
 List<int[]> COffset = new List<int[]>();
 private int NumPointer = 204;
 private void CalculateOffset()
    {
        for (int i = 4; i < NumPointer ; i++)
        {
            CRead = (int[])ResizeArray(CCheck, i);
            CRead[i - 1] = 0x4;
            CRead[i - 2] = 0x8;
            CCheck = CRead;

            COffset.Add(CRead);
        }
    }
 private static System.Array ResizeArray(System.Array oldArray, int newSize)
    {
        int oldSize = oldArray.Length;
        System.Type elementType = oldArray.GetType().GetElementType();
        System.Array newArray = System.Array.CreateInstance(elementType, newSize);

        int preserveLength = System.Math.Min(oldSize, newSize);

        if (preserveLength > 0)
            System.Array.Copy(oldArray, newArray, preserveLength);

        return newArray;
    }

This works very well in C# with no error. But now I am trying to make it work with C++.First I need to tell that I am just beginning learning C++.

My question is does it have any equivalent code to this C# code?

My C++ progress code:

static int CRead[]; //*Can't create this because it have to tell the size.
static int CCheck[] = { 0xAC, 0x10, 0x8, 0x4 };
list<int[]> COffset; //*don't know that it is correct or not. I don't know how to test it without fully done.
                     //#include <list> for using list
static int NumPointer = 204;
static void CalculateOffset(){
   for(int i =4 ; i<NumPointer ; i++){
      //This steps I have no idea at all because its need ResizeArray in C#.
   }
}

All the comment that I indicate is the part that I don't have any idea how to make it work. For example in CRead I can't assign the size of it because it is not a constant as you can see in C# code.

Answer 1

You only need to set last element as 0x8 and then append 0x4, there's not need to do so much explicit resizing by yourself, that'd be taken care of by - std::vector. I am keeping CCheck for this. It will have it's last element updated to 0x8 and then we'll will append 0x4 to it, making it the vector you'd want at iteration i:

vector<int> CCheck;
CCheck.push_back(0xAC);
CCheck.push_back(0x10);
CCheck.push_back(0x8 );
// Notice i am keeping only 3 members in CCCheck.
vector< vector< int > >  COffset;

for (int i = 4; i < NumPointer ; i++)
    {
        //Set last element as 0x08.
        CCheck[ i - 2] = 0x8; // Why i - 2 ; You want to set second last element to 0x8 which can be computed via "i - 2" or  "CCheck.size() - 1".
        //Now Insert last 0x4 and put it into COffset.
        CCheck.push_back(0x4);
        COffset.push_back(CCheck);
    }

Moreover, if your compiler supports C++11, you can do this - instead of pushing elements one by one:

  vector<int> CCheck = {0xAC, 0x10, 0x8}; // Again, only three elements.

Answer 2

For all the problem you listed the std::vector is the solution. Try it or other standard container ( maybe std::list could be fine ) to solve this problem.

I leave you 2 useful link to these construct:

vector

list