Use of the queue in C++ Builder

Fille - date.h

#include <stdio.h>

#include <iostream.h>

using namespace std;

struct cities

{

char *name;

int residents;

};

template <class Queue_cities> class CT

{

  private:

   Queue_cities *temporary;

   int begin,end,value;

  public:

   CT(int many)

   {

  value=many;

  temporary=new Queue_cities[value+1];

  end=0;

  begin=0;

   }

   void Insert(Queue_cities temp)

   {

  temporary[end++]=temp;

  if(end>value)

end=0;

   }

   int Work(Queue_cities &temp)

   {

  if(begin==end)

return -1;

  temp=temporary[begin++];

  if(begin>value)

begin=0;

  return 1;

   }

   bool is_Empty()

   {

  if(begin!=end)

return false;

  else

return true;

   }

};

C++ Builder:

#include <vcl.h>

#pragma hdrstop

#include "m_next02.h"

#include "date.h"

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

#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

private: // User declarations

  struct cities *usa_cities;

void __fastcall TForm1::FormCreate(TObject *Sender)

{

 usa_cities=new struct cities[10];

 usa_cities[0].name="New York";

 usa_cities[0].residents=8300000;

 usa_cities[1].name="Houston";

 usa_cities[1].residents=2200000;

 usa_cities[2].name="Phoenix";

 usa_cities[2].residents=1500000;

 usa_cities[3].name="Dallas";

 usa_cities[3].residents=1200000;

 usa_cities[4].name="Detroit";

 usa_cities[4].residents=700000;

 usa_cities[5].name="Chicago";

 usa_cities[5].residents=2700000;

 usa_cities[6].name="San Jose";

 usa_cities[6].residents=900000;

 usa_cities[7].name="San Francisco";

 usa_cities[7].residents=800000;

 usa_cities[8].name="Philadelphia";

 usa_cities[8].residents=1500000;

 usa_cities[9].name="Charlotte";

 usa_cities[9].residents=700000;

}

void __fastcall TForm1::Button2Click(TObject *Sender)

{

 int i;

 CT<char *> name_cities(10);

 CT<int> resident_cities(10);

 for(i=0;i<10;i++)

 {

name_cities.Insert(usa_cities[i].name);

resident_cities.Insert(usa_cities[i].residents);

 }

 for(i=0;i<11;i++)

 {

char *temporary_cities;

int temporary_residents;

int temp1,temp2;

temp1=name_cities.Work(temporary_cities);

temp2=resident_cities.Work(temporary_residents);

if(temp1==1 && temp2==1)

{

ListBox1->Items->Add("City  -   "+AnsiString(temporary_cities)+" has "+IntToStr(temporary_residents)+" residents");

}

 }

  if(name_cities.is_Empty() && resident_cities.is_Empty());

 ListBox1->Items->Add("Queue is empty");

}

void __fastcall TForm1::Button3Click(TObject *Sender)

{

 if(SaveDialog1->Execute())

 {

ListBox1->Items->SaveToFile(SaveDialog1->FileName);

 }

}

void __fastcall TForm1::Button1Click(TObject *Sender)

{

 delete usa_cities;

 Close();

}