double key = 0; //Stores the key value entered by the user.
double key_copy = key;
int k1;  //1st half of key.
int k2;  //2nd half of key.

#include <iostream>
#include <cmath>
#include <cstring>
using namespace std;

int main( int argc, char * argv[] )
{
double key = 0; //Stores the key value entered by the user.
double index = 15; /*Used for pow function.  For loop index corresponds to
hexadecimal powers.*/
if( argc > 1 )
{
if( strlen( argv[1] ) == 16 )
{
        for( int i = 0; i < 16; i++ )
        {
                switch( argv[1][i] )
                {
                        case '0': key += 0 * pow( 16.0, index );
                                break;
                        case '1': key += 1 * pow( 16.0, index );
                                break;
                        case '2': key += 2 * pow( 16.0, index );
                                break;
                        case '3': key += 3 * pow( 16.0, index );
                                break;
                        case '4': key += 4 * pow( 16.0, index );
                                break;
                        case '5': key += 5 * pow( 16.0, index );
                                break;
                        case '6': key += 6 * pow( 16.0, index );
                                break;
                        case '7': key += 7 * pow( 16.0, index );
                                break;
                        case '8': key += 8 * pow( 16.0, index );
                                break;
                        case '9': key += 9 * pow( 16.0, index );
                                break;
                        case 'A': key += 10 * pow( 16.0, index );
                                break;
                        case 'B': key += 11 * pow( 16.0, index );
                                break;
                        case 'C': key += 12 * pow( 16.0, index );
                                break;
                        case 'D': key += 13 * pow( 16.0, index );
                                break;
                        case 'E': key += 14 * pow( 16.0, index );
                                break;
                        case 'F': key += 15 * pow( 16.0, index );
                                break;
                        default: cout << "You entered a non-hexadecimal value.\n";
                                exit(0);
                }
                index--;
        }

        double key_copy = key;
        int k1;  //1st half of key.
        int k2;  //2nd half of key.
        key_copy /= pow( 2.0, 32.0 );  //Shift key to right to get 1st half of binary.
        k1 = (int) key_copy;
        key_copy = key;
        key_copy *= pow( 2.0, 31.0 );  //Shift key to left then right to get 2nd half
        key_copy /= pow( 2.0, 31.0 );  //of binary representation.
        k2 = key_copy;

        cout << k1 << endl;
        cout << k2 << endl;
}
}
        return 0;
}