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Hi I have a small program that takes a 10bit key, compresses it into 8bit key and does a left shift 8times, generating a key each time. I am using a one dimensional array to store the key value of each round. the probelm is that the next round over writes the key values. My code is as follows:

#include <iostream.h>
#include <stdlib.h>

int main()
{

    int cipherKey[10] = {1,0,1,0,0,1,0,1,0,0};
    int compression_P_box[8]= {4,10,6,3,8,2,1,7};
    int block[8];
    
    cout << "Compressed Key: ";
    for (int i=0; i<8; i++)
    {
       block[i] = cipherKey[compression_P_box[i]-1];
       cout << block[i] << " ";
    }
    cout << endl<<endl;   
    cout << "Round Key:" << endl;
    for (int j=0; j<8; j++)
    {
       int temp[8];
       temp[j] = block[0];
       for (int k=1; k<=8; k++)
       {
         block[k-1] = block[k];
         block[8] = temp[j];
         cout << block[k] << " " ;
       }
       cout << endl;
    }
    cout << endl;

      system("PAUSE");
      return 0;
}

I want to store the values in a two dimensional array. Any help would be appreciated.

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