Liren Large Software Subsidy 10/10.iso/m/m003_1/sb_bc.ddi/BC/CH4/PROG4-10.CPP

C/C++ Source or Header | 1991-12-10 | 4.4 KB | 257 lines

//  PROG4-10.CPP

#include<string.h>
#include<stdio.h>

/////////  Base Class : GM
/////////
class GM
{ protected:
    char *CarName ;

  public:
    GM(void) ;
    GM(char *name) ;
    ~GM() ;
    void ShowCarName(void) ;
} ;


GM::GM(void)
{
  CarName = NULL ;
}

GM::GM(char *name)
{
  CarName = strdup(name) ;
}

GM::~GM(void)
{
  delete CarName ;
}

void GM::ShowCarName(void)
{
  printf("General Motors .\n") ;
}


/////////  Derived Class : Cadillac
/////////
class Cadillac : public GM
{ public :
    Cadillac(void) ;
    Cadillac(char *name) ;
    void ShowCarName(void) ;
} ;


Cadillac::Cadillac(void) : GM()
{
  // empty
}

Cadillac::Cadillac(char *name) : GM(name)
{
  // empty
}

void Cadillac::ShowCarName(void)
{
  printf("Cadillac car named %s\n",CarName) ;
}


/////////  Derived Class : Buick
/////////
class Buick : public GM
{ public :
    Buick(void) ;
    Buick(char *name) ;
    void ShowCarName(void) ;
} ;


Buick::Buick(void) : GM()
{
  // empty
}

Buick::Buick(char *name) : GM(name)
{
  // empty
}

void Buick::ShowCarName(void)
{
  printf("Buick car named %s\n",CarName) ;
}



//////////  Class GMLover
//////////
class GMLover
{ private:
    unsigned int MaxCadillac ;
    unsigned int NumCadillac ;
    Cadillac **AryCadillac ;

    unsigned int MaxBuick ;
    unsigned int NumBuick ;
    Buick **AryBuick ;

  public:
    GMLover(unsigned int maxc, unsigned int maxb) ;
    ~GMLover() ;

    unsigned int Purchase(Cadillac *c) ;
    unsigned int Purchase(Buick *b) ;

    Cadillac *SellCadillac(unsigned int c) ;
    Buick    *SellBuick(unsigned int b) ;

    void ListCars(void) ;
} ;


GMLover::GMLover(unsigned int maxc, unsigned int maxb)
{
  MaxCadillac = maxc ;
  NumCadillac = 0 ;

  MaxBuick = maxb ;
  NumBuick = 0 ;

  AryCadillac = new Cadillac * [MaxCadillac] ;
  AryBuick    = new Buick    * [MaxBuick] ;

  for (int i=0 ; i<MaxCadillac; i++) AryCadillac[i]=NULL ;

  for (i=0 ; i<MaxBuick; i++) AryBuick[i]=NULL ;
}

GMLover::~GMLover(void)
{
  delete AryCadillac ;
  delete AryBuick ;
}

unsigned int GMLover::Purchase(Cadillac *c)
{
  if (NumCadillac == MaxCadillac) return 0 ;

  NumCadillac++ ;

  int i=0 ;
  while (AryCadillac[i] != NULL) i++ ;

  AryCadillac[i] = c ;

  return i+1 ;
}

unsigned int GMLover::Purchase(Buick *b)
{
  if (NumBuick == MaxBuick) return 0 ;

  NumBuick++ ;

  int i=0 ;
  while (AryBuick[i] != NULL) i++ ;

  AryBuick[i] = b ;

  return i+1 ;
}

Cadillac *GMLover::SellCadillac(unsigned int c)
{
  if (c > MaxCadillac) return NULL ;

  c-- ;

  if (AryCadillac[c] != NULL)
     { Cadillac *temp = AryCadillac[c] ;

       AryCadillac[c] = NULL ;
       NumCadillac-- ;

       return temp ;
     }
  else return NULL ;
}

Buick *GMLover::SellBuick(unsigned int b)
{
  if (b > MaxBuick) return NULL ;

  b-- ;

  if (AryBuick[b] != NULL)
     { Buick *temp = AryBuick[b] ;

       AryBuick[b] = NULL ;
       NumBuick-- ;

       return temp ;
     }
  else return NULL ;
}

void GMLover::ListCars(void)
{ int i ;

  if (NumCadillac>0)
     for (i=0; i<MaxCadillac; i++)
     if (AryCadillac[i] != NULL)
        { printf("Car Lover said : This car is my %d-th ",i+1) ;
          AryCadillac[i]->ShowCarName() ;
        }

  if (NumBuick>0)
     for (i=0; i<MaxBuick; i++)
     if (AryBuick[i] != NULL)
        { printf("GM Lover said : This car is my %d-th ",i+1) ;
          AryBuick[i]->ShowCarName() ;
        }
}



Cadillac C1("BROUGHAM") ;
Cadillac C2("FLEETWOOD") ;
Cadillac C3("DE VILLE") ;

Buick B1("PARK AVENUE") ;
Buick B2("CENUTRY") ;
Buick B3("REGAL") ;


int main()
{ GMLover Chen(4,5) ;

  Chen.Purchase(&C3) ;            // Chen purchases DE VILLE, Cadillac

  unsigned int b2car = Chen.Purchase(&B2) ;
                  // Chen purchases CENUTRY, Buick

  Chen.Purchase(&C2) ;            // Chen purchases FLEETWOOD, Cadillac

  unsigned int c1car = Chen.Purchase(&C1) ;
                  // Chen purchases BROUGHAM, Cadillac

  Chen.SellCadillac(c1car) ;      // Chen sells BROUGHAM, Cadillac

  Chen.Purchase(&B1) ;            // Chen purchases PARK AVENUE, Buick

  Chen.Purchase(&B3) ;            // Chen purchases REGAL, Buick

  Chen.SellBuick(b2car) ;         // Chen selle CENUTRY, Buick

  Chen.ListCars() ;               // List all Chen's GM cars
}