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unit GetOverload;
interface uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Buttons; type TForm5 = class(TForm) lbl1: TLabel; edt1: TEdit; lbl2: TLabel; edt2: TEdit; lbl3: TLabel; edt3: TEdit; btn1: TBitBtn; edt4: TEdit; lbl4: TLabel; procedure btn1Click(Sender: TObject); private function Add(A: Integer; B:Integer) :Integer; overload; //申明函数重载 function Add(A: string; B: string) :string; overload; // 申明函数重载 { Private declarations } public { Public declarations } end; var Form5: TForm5; implementation {$R *.dfm} function TForm5.Add(A: Integer; B: Integer): Integer; // 函数重载实现 begin Result := A + B; end; function TForm5.Add(A: string; B: string) : string; // 函数重载实现 begin Result := A + B; end; procedure TForm5.btn1Click(Sender: TObject); var Sumi : Integer; SumS: string; begin Sumi := Add(StrToInt(edt1.Text),StrToInt(edt2.Text)); //调用函数重载 SumS := Add(edt1.Text, edt2.Text); //调用函数重载 edt3.Text := IntToStr(Sumi); edt4.Text := SumS; end; end. |
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原文地址：http://www.cnblogs.com/kivin/p/4646971.html
