Calculator - C++ Builder

class Calculator:

File - calc_unit.h 

#ifndef calc_unitH

#define calc_unitH

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

class Calculator

{

private:

float x1,x2,result;

public:

Calculator();

void Read(float a, float b);

float Plus();

float Minus();

float Multiplication();

float Division();

float SQRT();

float Inverse();

float EXP();

};

#endif

File - calc_unit.cpp

#pragma hdrstop

#include "calc_unit.h"

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

#pragma package(smart_init)

Calculator::Calculator()

{

;

}

void Calculator::Read(float a, float b)

{

x1=a;

x2=b;

}

float Calculator::Plus()

{

result=x1+x2;

return result;

}

float Calculator::Minus()

{

result=x1-x2;

return result;

}

float Calculator::Multiplication()

{

result=x1*x2;

return result;

}

float Calculator::Division()

{

   result=x1/x2;

   return result;

}

float Calculator::SQRT()

{

result=sqrt(x1);

return result;

}

float Calculator::Inverse()

{

result=(1.00/x1);

return result;

}

float Calculator::EXP()

{

  int i,temp=int(x2);

  result=x1;

  for(i=0;i<temp-1;i++)

   result*=x1;

  return result;

}

Project C++ Builder:

#include <vcl.h>

#include <math.h>

#pragma hdrstop

#include "p_Proj_Calc.h"

#include "calc_unit.h"

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

#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

Calculator cl;

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

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

}

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

void __fastcall TForm1::Button1Click(TObject *Sender)

{

 cl.Read(StrToFloat(Edit1->Text),StrToFloat(Edit2->Text));

 Edit3->Text=FloatToStr(cl.Plus());

}

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

void __fastcall TForm1::Button2Click(TObject *Sender)

{

  cl.Read(StrToFloat(Edit1->Text),StrToFloat(Edit2->Text));

  Edit3->Text=FloatToStr(cl.Minus());

}

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

void __fastcall TForm1::Button3Click(TObject *Sender)

{

 cl.Read(StrToFloat(Edit1->Text),StrToFloat(Edit2->Text));

 Edit3->Text=FloatToStr(cl.Multiplication());

}

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

void __fastcall TForm1::Button4Click(TObject *Sender)

{

 cl.Read(StrToFloat(Edit1->Text),StrToFloat(Edit2->Text));

 Edit3->Text=FloatToStr(cl.Division());

}

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

void __fastcall TForm1::Button5Click(TObject *Sender)

{

 cl.Read(StrToFloat(Edit1->Text),StrToFloat(Edit2->Text));

 Edit3->Text=FloatToStr(cl.Inverse());

}

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

void __fastcall TForm1::Button6Click(TObject *Sender)

{

 cl.Read(StrToFloat(Edit1->Text),StrToFloat(Edit2->Text));

 Edit3->Text=FloatToStr(cl.SQRT());

}

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

void __fastcall TForm1::Button7Click(TObject *Sender)

{

 cl.Read(StrToFloat(Edit1->Text),StrToFloat(Edit2->Text));

 Edit3->Text=FloatToStr(cl.EXP());

}