Calling function in classes

[candexis]

So I am working with classes and I have the following Method, which rotate a variable:

unsigned __int64 Subkeys::Rotaio nalLeftShift()
{
unsigned __int64 top_bits = 0;

top_bits = K >> (sizeof K * CHAR_BIT) -desplazar;
K <<= desplazar;

K |= top_bits;
return K;
}


Then I have another function (permute ()) that belongs to the same class Subkeys, and this function needs to call the RotaionalLeftSh ift() function to rotate two different varable and with diferent rotation, So how do I have to initialize the variable K and desplazar to achive rotations of diferent variables.
for example if part of the permute function code is:

for(ix=0; ix<((sizeof C)/(sizeof C[0]))-1; ix++)
{
C[ix+1] = (C[ix], rote[ix]);
D[ix+1] = f( D[ix] );
}

before of ecxecute the instruction "C[ix+1] = (C[ix], rote[ix]);" , I mus initialize the value for K, in this case K = C[ix] and desplazar = rote[ix]; and so on
So how do I have to manage this. Thanks for your help

[D_C]

You pass parameters. Since you are dealing with arrays, the best way to pass them is with a pointer and a length variable. I am assuming array C and array rote have the same number of entries. You may want to assert that. I also assume they are character arrays.

Then, the first couple lines of code should be

unsigned __int64 Subkeys::RotationalLeftShift(int* C_ptr, int* rote_ptr, int length)
{
  char K[length] = *C_ptr;       // Is K int or char array, or what?
  char rote[length] = *rote_ptr; // Same goes for rote.
 
  for(ix = 0; ix < length; ix++)
  {
    ...