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unit Functioncal;
interface uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls; type TForm5 = class(TForm) lbl1: TLabel; edt1: TEdit; lbl2: TLabel; edt2: TEdit; btn1: TButton; lbl3: TLabel; edt3: TEdit; procedure btn1Click(Sender: TObject); function ADD(const A: Integer; const B: Integer): Integer; //常量参数,不能修改参数 private { Private declarations } public { Public declarations } end; var Form5: TForm5; implementation {$R *.dfm} function TForm5.ADD(const A: Integer; const B: Integer): Integer; //常量参数函数实现 begin result := A+ B; end; procedure TForm5.btn1Click(Sender: TObject); var x : Integer; y : Integer; begin x := StrToInt(edt1.Text); y := StrToInt(edt2.Text); edt3.Text := IntToStr(ADD(x,y)); //调用常量参数函数 end; end. |
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原文地址:http://www.cnblogs.com/kivin/p/4646953.html