calc.cpp

C++ Builder 6 编程实例教程-北京希望电子出版社出版

//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include <math.h>
#include "Calc.h"

//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"

TForm1 *Form1;
float temp1;
float temp2;
int flag;
int append;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button1->Caption;
 //单击1按钮
 append=0;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::FormCreate(TObject *Sender)
{
 Form1->Edit1->Clear();
 //清除文本框中的内容
 temp1=0;
 temp2=0;
 flag=0;
 append=0;
 //变量赋初值
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button2->Caption;
 //单击2按钮
 append=0;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button3Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button3->Caption;
 //单击3按钮
 append=0;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button4Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button4->Caption;
 //单击4按钮
 append=0;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button5Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button5->Caption;
 //单击5按钮
 append=0;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button6Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button6->Caption;
 //单击6按钮
 append=0;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button7Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button7->Caption;
 //单击7按钮
 append=0;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button8Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button8->Caption;
 //单击8按钮
 append=0;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button9Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button9->Caption;
 //单击9按钮
 append=0;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button10Click(TObject *Sender)
{
if (append!=0) Form1->Edit1->Clear();
 Form1->Edit1->Text=Form1->Edit1->Text+Form1->Button10->Caption;
 //单击0按钮
 append=0;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button13Click(TObject *Sender)
{
flag=1;
//设置加法标志
if (Form1->Edit1->Text!="")
temp1=StrToFloat(Form1->Edit1->Text);
//为变量temp1赋值
//Form1->Edit1->Clear();
//清空文本框
append=1;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button14Click(TObject *Sender)
{
flag=2;
//设置减法标志
if (Form1->Edit1->Text!="")
temp1=StrToFloat(Form1->Edit1->Text);
//为变量temp1赋值
//Form1->Edit1->Clear();
//清空文本框
append=1;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button15Click(TObject *Sender)
{
flag=3;
//设置乘法标志变量值
if (Form1->Edit1->Text!="")
temp1=StrToFloat(Form1->Edit1->Text);
//为变量temp1赋值
//Form1->Edit1->Clear();
//清空文本框
append=1;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button16Click(TObject *Sender)
{
flag=4;
//设置除法标志
if (Form1->Edit1->Text!="")
temp1=StrToFloat(Form1->Edit1->Text);
//为变量temp1赋值
//Form1->Edit1->Clear();
//清空文本框
append=1;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button11Click(TObject *Sender)
{
 switch (flag)
 {
     case 1: temp2=StrToFloat(Edit1->Text)+StrToFloat(temp1);
             //进行加法运算
             break;
     case 2: temp2=StrToFloat(temp1)-StrToFloat(Edit1->Text);
             //进行减法运算
             break;
     case 3: temp2=StrToFloat(Edit1->Text)*StrToFloat(temp1);
             //进行乘法运算
             break;
     case 4: temp2=StrToFloat(temp1)/StrToFloat(Edit1->Text);
             //进行除法运算
 }
 Edit1->Text=FloatToStr(temp2);
 //显示运算结果
 append=1;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button12Click(TObject *Sender)
{
 Form1->Edit1->Clear();
 //清除文本框中的内容
 temp1=0;
 temp2=0;
 flag=0;
 //变量赋初值

}
//---------------------------------------------------------------------------