, C++ Builder, Windows. . , , . , . , - , ++ Builder . : , , - .
. . C++ Builder , . .
(-) , , , .
C++ Builder , . , Button1, , :
void __fastcall TForm1::Button1Click(TObject *Sender)
{
}
.
"", Events OnClick. .
? -, a, b c; , Text Edit ; Edit4 Edit5.
, .
void __fastcall TForm1::Button1Click(TObject *Sender)
{
float a,b,c,d,x1,x2;
a=StrToFloat(Edit1->Text);
b=StrToFloat(Edit2->Text);
c=StrToFloat(Edit3->Text);
d=b*b-4*a*c;
if (d>=0)
{
x1=(-b-sqrt(d))/(2*a);
x2=(-b+sqrt(d))/(2*a);
Edit4->Text=FloatToStr(x1);
Edit5->Text=FloatToStr(x2);
}
else
ShowMessage(" ");
}
#include<math.h>
( ).
.
, .
|
|
StrToFloat() FloatToStr() . Windows ShowMessage().
"". Button2Click
Form1->Close();
Close() , .
. . , .
. . "" "".
"". Events OnClick Button1Click. "", Button2Click. "", OnClik, N3Click
Form2->ShowModal();
#include "__.h".
__ , .
ShowModal() , , ( ).
"" OnClick Button1Click; Button2Click. "" , , "".
StatusBar1. , Properties , SimplePanel True.
FormCreate :
void __fastcall TForm1::FormCreate(TObject *Sender)
{
StatusBar1->SimpleText=" ";
}
.