Problem with Winreg functions

Why doesn't this program work?? I used C/C++ var types for input instead of Api because I didn't feel like overloading the >> operator.

Code:

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#include <windows.h>
#include <iostream.h>

int main()
{char csubkey[70],clpvaluename[70];
  HKEY hkResult;
  long gooddelete;
  int loop;
  cout<<"Do you want to delete a registry value?"<<endl
        <<"1 to delete, 0 to quit"<<endl;
  cin>>loop;

  while(loop)
  {
    cout<<endl<<endl<<endl<<"Name of subkey to delete:"<<endl;
    cin>>csubkey;
    cin.clear();
    cin.ignore(80,'\n');
    cout<<endl<<"Name of value to delete:"<<endl;
    cin>>clpvaluename;
    cin.clear();
    cin.ignore(80,'\n');



    RegOpenKeyEx(HKEY_CURRENT_USER,
                            csubkey,
                            0,0,
                            &hkResult);

    gooddelete=RegDeleteValue(hkResult,clpvaluename);

    RegCloseKey(hkResult);

    cout<<endl<<endl<<endl;
    if (!gooddelete)
    {cout<<"Delete successful";}
    else
    {cout<<"Delete unsuccessful"<<endl<<endl;}
    cout<<"Do you want to continue?"<<endl<<"1 to continue, 0 to quit"<<endl;
    cin>>loop;
    cin.clear();
    cin.ignore(80,'\n');
 }
  return 0;
}

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P.S. If there are no problems, can you please help me with how the input should be formatted: i.e. begin with \\ or just \ or use \\ the entire time or just \