I'm passing code from vba to c # but I can not find the keyword " To " for c #
Example:
Xl = -1208721221 Xr = -38092073
Const ROUND = 16
private m_pBox(0 To ROUND + 1) As Long
Private static Sub DecryptBlock(Xl As Long, Xr As Long)
Dim temp As Long
temp = Xr
Xr = Xl Xor m_pBox(ROUNDS + 1)
Xl = temp Xor m_pBox(ROUNDS)
End Sub
And could you also explain to me what this line of code does in VBA?
The following sentences ...
Const ROUND = 16
private m_pBox(0 To ROUND + 1) As Long
... equal to ...
private m_pBox(0 To 17) As Long
... which results in creating an array with 18 elements (0 to 17).
In C # there is no equivalent syntax with To for arrays since it is implicit that all arrays begin with index 0, and you just need to indicate the size of the array.
So in C #, the equivalent would be simply:
private const int ROUND = 16;
private long[] m_pBox = long[16 + 2];
... or:
private long[] m_pBox = long[18];
without bad memory, this syntax is used to declare an array by value range. In your concrete case to pass it to c # you have no problem because the arrays already start at 0 and the solution that @pikoh has proposed is correct: private long[] m_pBox = new long[ROUND + 2];