//	studenten.cc

#include <iostream.h>
#include <strings.h>
#include "studenten3.hh"

// ---------------------------------------------------------------------

Studenten :: Studenten()
{
 matrikel = skz = 0;
 pname = pvorname = 0;
}

// ---------------------------------------------------------------------

Studenten :: Studenten(const char vorname[], const char name[], 
		  const long int  mat_nr,    const int  skz_nr)
{
 matrikel = mat_nr;
 skz      = skz_nr;
 
 pname = new char[strlen(name)+1];
 strcpy(pname,name); 
 pvorname = new char[strlen(vorname)+1];
 strcpy(pvorname,vorname);
}

// ---------------------------------------------------------------------
//	Copy constructor will be applied only to uninitialized data
//	===> no deallocation of memory necessary

Studenten :: Studenten(const Studenten& orig)
{
 matrikel = orig.matrikel;
 skz      = orig.skz;
 
 if (orig.pname !=0 ) 
  {
    pname = new char[strlen(orig.pname)+1];
    strcpy(pname,orig.pname); 
  }
 else
  {
    pname = 0;
  }
 if (orig.pvorname != 0)
  {
   pvorname = new char[strlen(orig.pvorname)+1];
   strcpy(pvorname,orig.pvorname);
  }
 else
  {
   pvorname = 0;
  }
}

// ---------------------------------------------------------------------

Studenten :: ~Studenten()
{
 if (pvorname != 0) delete [] pvorname;
 if (   pname != 0) delete [] pname;
}

// ---------------------------------------------------------------------
//	Assignment operator will be applied also to already initialized data
//	===> deallocation of memory may be necessary

Studenten& Studenten :: operator=(const Studenten & orig)
{
 if ( &orig != this )
  {
    if (pvorname != 0)  delete [] pvorname;
    if (pname != 0)     delete [] pname;

    matrikel = orig.matrikel;
    skz      = orig.skz;

    if (orig.pname !=0 ) 
     {
       pname = new char[strlen(orig.pname)+1];
       strcpy(pname,orig.pname); 
     }
    else
     {
       pname = 0;
     }
    if (orig.pvorname != 0)
     {
      pvorname = new char[strlen(orig.pvorname)+1];
      strcpy(pvorname,orig.pvorname);
     }
    else
     {
      pvorname = 0;
     }
   }

 return *this;
}

// ---------------------------------------------------------------------

ostream & operator<<(ostream  & s, const Studenten & orig)
{
 return s << orig.pvorname << " "   << orig.pname << " , "
          << orig.matrikel << " , " << orig.skz; 
} 

// ---------------------------------------------------------------------
 
void Studenten :: Print(ostream  & s)
{
  if (pvorname != 0)  s << pvorname << " ";
  if (   pname != 0)  s <<    pname << " , ";
  s << matrikel << " , " << skz << endl;
  return;
}

// ---------------------------------------------------------------------
//		Methods to access the private data
//			Set data values
void Studenten :: SetVorname(const char vorname[])
{
 if (pvorname != 0) delete [] pvorname;
 pvorname = new char[strlen(vorname)+1];
 strcpy(pvorname,vorname); 
 return;
}

void Studenten :: SetName(const char name[])
{
 if (pname != 0) delete [] pname;
 pname = new char[strlen(name)+1];
 strcpy(pname,name); 
 return;
}