My class info_File - C++ Builder

 

 m_File.h

#ifndef m_FileH

#define m_FileH

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

class info_File

{

 private:

 UnicodeString Name;

 UnicodeString Size;

 UnicodeString Modification;

 UnicodeString Attribute;

public:

 TFileListBox *TL;

 TListBox *TB;

 TSearchRec t_Rec;

 TStrings* i_File;

 info_File(TFileListBox *a1, TListBox *b1);

 void Load();

 void Run();

 ~info_File();

};

#endif

m_File.cpp

#pragma hdrstop

#include <vcl.h>

#include <Vcl.FileCtrl.hpp>

#include <Vcl.StdCtrls.hpp>

#include <System.Classes.hpp>

#include "m_File.h"

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

#pragma package(smart_init)

info_File::info_File(TFileListBox *a1, TListBox *b1)

{

UnicodeString temp;

TL=a1;

TB=b1;

temp=TL->FileName;

if(FindFirst(temp,faAnyFile,t_Rec)!=0)

{

return;

}

FindClose(t_Rec);

i_File=new TStringList();

}

void info_File::Load()

{

   Name=(UnicodeString)t_Rec.Name;

   Size=(UnicodeString)t_Rec.Size;

   Modification=(UnicodeString)DateTimeToStr(FileDateToDateTime(t_Rec.Time));

   Attribute=IntToStr(t_Rec.Attr);

   i_File->Add("Name: "+ Name);

   i_File->Add("Size: "+Size);

   i_File->Add("Date last modification: "+Modification);

   i_File->Add("Attribute: "+Attribute);

}

void info_File::Run()

{

   TB->Items->Clear();

   TB->Items->Assign(i_File);

}

info_File::~info_File()

{

    delete i_File;

}

Project: Unit1.cpp

#include <vcl.h>

#pragma hdrstop

#include "Unit1.h"

#include "m_File.h"

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

#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

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

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

}

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

void __fastcall TForm1::FormCreate(TObject *Sender)

{

 DirectoryListBox1->FileList=FileListBox1;

}

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

void __fastcall TForm1::FileListBox1Click(TObject *Sender)

{

 info_File Date(FileListBox1,ListBox1);

 Date.Load();

 Date.Run();

}

std::sort() - C++ Builder

#include <vcl.h>

#include <algorithm>

#include <random>

#include <vector>

#pragma hdrstop

#include "Unit1.h"

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

#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

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

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

}

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

void __fastcall TForm1::FormCreate(TObject *Sender)

{

 Button1->Caption="&RUN";

 Button2->Caption="&CLOSE";

}

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

void __fastcall TForm1::Button1Click(TObject *Sender)

{

int i,j,k;

 struct Point

 {

int x;

int y;

 };

 std::vector<Point> date;

 std::random_device r1;

 std::mt19937 gen(r1());

 std::uniform_int_distribution<>dist(1,25);

 for(i=0;i<5;i++)

 {

date.push_back({dist(gen),dist(gen)});

 }

 j=0;

 for(const auto& temp1 : date)

 {

StringGrid1->Cells[j][0]=IntToStr(temp1.x);

StringGrid1->Cells[j][1]=IntToStr(temp1.y);

++j;

 }

 std::sort(begin(date),end(date),[] (const Point &v1, const Point &v2)

 {

return v1.y<v2.y;

 });

 j=0;

 for(const auto& temp2 : date)

 {

StringGrid2->Cells[j][0]=IntToStr(temp2.x);

StringGrid2->Cells[j][1]=IntToStr(temp2.y);

++j;

 }

}

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

void __fastcall TForm1::Button2Click(TObject *Sender)

{

 Close();

}

 

priority_queue - C++ Builder

 

#include <vcl.h>

#include <System.SysUtils.hpp>

#include <iostream>

#include <queue>

#include <tuple>

#pragma hdrstop

#include "Unit1.h"

using namespace std;

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

#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

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

struct info_var_Data

{

float value;

UnicodeString name;

};

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

}

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

void __fastcall TForm1::Button1Click(TObject *Sender)

{

 float data_Values[8]={0.00,0.11,0.22,0.33,0.44,0.55,0.66,0.77};

 UnicodeString v_Names[8]={"VarEmty","varNull","varSmallint","varInteger","varSingle",

 "varDouble","varVurrency","varDate"};

 struct info_var_Data *v_Data=new struct info_var_Data[8];

 struct info_var_Data *temp_Values=new struct info_var_Data[8];

 for(int i=0;i<8;i++)

 {

v_Data[i].value=data_Values[i];

v_Data[i].name=v_Names[i];

 }

 using x_Date=pair<float,UnicodeString>;

 priority_queue<x_Date> temp;

 int temp_Index[8]={3,0,1,4,2,7,5,6,};

 initializer_list<x_Date> v8

 {

  {v_Data[temp_Index[0]].value,v_Data[temp_Index[0]].name},

  {v_Data[temp_Index[1]].value,v_Data[temp_Index[1]].name},

  {v_Data[temp_Index[2]].value,v_Data[temp_Index[2]].name},

  {v_Data[temp_Index[3]].value,v_Data[temp_Index[3]].name},

  {v_Data[temp_Index[4]].value,v_Data[temp_Index[4]].name},

  {v_Data[temp_Index[5]].value,v_Data[temp_Index[5]].name},

  {v_Data[temp_Index[6]].value,v_Data[temp_Index[6]].name},

  {v_Data[temp_Index[7]].value,v_Data[temp_Index[7]].name},

 };

 for(int i=0;i<8;i++)

 {

  temp_Values[i].value=v_Data[temp_Index[i]].value;

  temp_Values[i].name=v_Data[temp_Index[i]].name;

  StringGrid1->Cells[i][0]=FloatToStrF(temp_Values[i].value,ffGeneral,2,2);

  StringGrid1->Cells[i][1]=temp_Values[i].name;

 }

 for(const auto &it : v8)

 {

temp.push(it);

 }

 int j=0;

 while(!temp.empty())

 {

  StringGrid2->Cells[j][0]=FloatToStrF(temp.top().first,ffGeneral,2,2);

  StringGrid2->Cells[j][1]=temp.top().second;

  temp.pop();

  ++j;

 }

 delete [] v_Data;

 delete [] temp_Values;

}

Loading text files - C++ Builder

 

pFile.h

#include <Vcl.Forms.hpp>

#include <Vcl.ExtCtrls.hpp>

#include <Vcl.FileCtrl.hpp>

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

class TForm1 : public TForm

{

__published: // IDE-managed Components

TTimer *Timer1;

TLabel *Label1;

TFileListBox *FileListBox1;

TDirectoryListBox *DirectoryListBox1;

TDriveComboBox *DriveComboBox1;

TMemo *Memo1;

void __fastcall Timer1Timer(TObject *Sender);

void __fastcall FormCreate(TObject *Sender);

void __fastcall FileListBox1Change(TObject *Sender);

private: // User declarations

void __fastcall init_Components();

void __fastcall Run();

public: // User declarations

DWORD size_Bytes;

HANDLE ident;

char buff[1024+1024+1024+1024];

__fastcall TForm1(TComponent* Owner);

};

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

extern PACKAGE TForm1 *Form1;

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

#endif

pFile.cpp

#include <vcl.h>

#pragma hdrstop

#include "pFile.h"

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

#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

SECURITY_ATTRIBUTES s_a;

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

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

  s_a={sizeof(SECURITY_ATTRIBUTES),NULL,TRUE};

}

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

void __fastcall TForm1::Run()

{

int i;

char c='.';

memset(buff,0,sizeof(buff)-1);

ident=CreateFile(FileListBox1->FileName.c_str(),GENERIC_READ, FILE_SHARE_READ,

&s_a,OPEN_EXISTING,0,NULL);

if(ident!=INVALID_HANDLE_VALUE)

ReadFile(ident,&buff,sizeof(buff),&size_Bytes,NULL);

for(i=0;i<sizeof(buff)-1;i++)

if(buff[i]==NULL)

  buff[i]=c;

Memo1->Text=buff;

CloseHandle(ident);

}

void __fastcall TForm1::init_Components()

{

DirectoryListBox1->FileList=FileListBox1;

DriveComboBox1->DirList=DirectoryListBox1;

}

void __fastcall TForm1::Timer1Timer(TObject *Sender)

{

 UnicodeString t,d;

 t=TimeToStr(Time());

 d=DateToStr(Date());

 Label1->Caption=t+"  "+d;

}

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

void __fastcall TForm1::FormCreate(TObject *Sender)

{

 init_Components();

}

class info_Printers - C++ Builder

#ifndef pprinters1H

#define pprinters1H

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

class info_Printers

{

private:

wchar_t name_Printer[128];

wchar_t driver[1024];

wchar_t port[1024];

unsigned int mode;

TListBox* list_Box;

public:

info_Printers(TListBox* l_Box);

void write_Printers();

};

#endif

#pragma hdrstop

#include "pprinters1.h"

#include <Printers.hpp>

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

#pragma package(smart_init)

info_Printers::info_Printers(TListBox* l_Box)

{

Printer()->GetPrinter(name_Printer,driver,port,mode);

list_Box=l_Box;

list_Box->Items->Clear();

}

void info_Printers::write_Printers()

{

list_Box->Items->Add("All printers: \n");

list_Box->Items->AddStrings(Printer()->Printers);

list_Box->Items->Add("Default printer:");

        list_Box->Items->Add(UnicodeString(name_Printer));

}

void __fastcall TForm1::Button1Click(TObject *Sender)

{

 info_Printers my_Printers(ListBox1);

 my_Printers.write_Printers();

}

 

Retrieving data from a file into C++ Builder components.

File: top_Population.txt (location in directory Project C++ Builder)

India 1450935791 17.78

Pakistan 251269164 3.08

China 1419321278 17.39

United_States 345426571 4.23

Nigeria 232679478 2.85

Indonesia 283487931 3.47

struct Date

{

char name_Country[64];

float population_Country;

float procent_World;

};

void __fastcall TForm1::FormCreate(TObject *Sender)

{

 StringGrid1->Cells[0][0]="Country";

 StringGrid1->Cells[1][0]="Population";

 StringGrid1->Cells[2][0]="World Share";

 Button1->Caption="Open";

 Button2->Caption="Close";

}

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

void __fastcall TForm1::Button1Click(TObject *Sender)

{

 struct Date* population_Info=new struct Date[6];

 FILE* my_File=fopen("top_Population.txt","r");

 if(!my_File)

 {

ShowMessage("Can't open file!");

 }

 else

 {

  for(int i=0;i<6;i++)

  {

fscanf(my_File,"%s %f %f\n",population_Info[i].name_Country,

&population_Info[i].population_Country,&population_Info[i].procent_World);

  }

  fclose(my_File);

  for(int i=0;i<6;i++)

  {

StringGrid1->Cells[0][i+1]=UnicodeString(population_Info[i].name_Country);

StringGrid1->Cells[1][i+1]=FloatToStr(population_Info[i].population_Country);

StringGrid1->Cells[2][i+1]=FloatToStrF(population_Info[i].procent_World,ffGeneral,7,1)+"%";

  }

 }

 delete [] population_Info;

}

 

Ascending and descending sorting - Example - class C++ Builder

 

New Unit:

File Class_Sorting.h

class multi_Sort

{

 private:

  int* tab_Date;

  int* min_Tab;

  int* max_Tab;

  int length;

 public:

multi_Sort(int size);

~multi_Sort();

void min_Sort(int *tab, int s);

void max_Sort(int* tab, int s);

void Load(int *tab);

int *min_Result();

     int *max_Result();

};

File Class_Sorting.cpp

#include "class_Sorting.h"

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

#pragma package(smart_init)

multi_Sort::multi_Sort(int size)

{

length=size;

tab_Date=new int[length];

min_Tab=new int[length];

max_Tab=new int[length];

}

multi_Sort::~multi_Sort()

{

delete max_Tab;

delete min_Tab;

delete tab_Date;

}

void multi_Sort::min_Sort(int *tab, int s)

{

int i,j,k;

for(i=1;i<s;i++)

{

j=i;

k=tab[j];

while((j>0) && (tab[j-1]>k))

{

tab[j]=tab[j-1];

j--;

}

tab[j]=k;

}

}

void multi_Sort::max_Sort(int* tab, int s)

{

int i,j,k;

for(i=1;i<s;i++)

{

j=i;

k=tab[j];

while((j>0) && (tab[j-1]<k))

{

tab[j]=tab[j-1];

j--;

}

tab[j]=k;

}

}

void multi_Sort::Load(int *tab)

{

for(int i=0;i<length;i++)

{

tab_Date[i]=min_Tab[i]=max_Tab[i]=tab[i];

}

}

int* multi_Sort::min_Result()

{

  min_Sort(min_Tab,length);

  return min_Tab;

}

int* multi_Sort::max_Result()

{

  max_Sort(max_Tab,length);

  return max_Tab;

}

Main Project:

#include <vcl.h>

#include <stdlib.h>

#include <time.h>

#pragma hdrstop

#include "p_Example.h"

#include "class_Sorting.h"

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

#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

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

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

}

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

void __fastcall TForm1::FormCreate(TObject *Sender)

{

 srand(time(NULL));

 Button1->Caption="&RUN";

}

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

void __fastcall TForm1::Button1Click(TObject *Sender)

{

  #define ssize 10

  #define mmax 100

  int j;

  int* main_Date=new int[ssize];

  int* min_Date=new int[ssize];

  int* max_Date=new int[ssize];

  for(int i=0;i<ssize;i++)

  {

  j=1+rand()%mmax;

  main_Date[i]=j;

  }

  multi_Sort my_Class(ssize);

  my_Class.Load(main_Date);

  min_Date=my_Class.min_Result();

  max_Date=my_Class.max_Result();

  for(int i=0;i<ssize;i++)

  {

  StringGrid1->Cells[i][0]=IntToStr(main_Date[i]);

  StringGrid1->Cells[i][1]=IntToStr(min_Date[i]);

      StringGrid1->Cells[i][2]=IntToStr(max_Date[i]);

  }

  delete max_Date;

  delete min_Date;

  delete main_Date;

}