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和记娱乐安卓下载和:WinAPI 字符及字符串函数(3) CharUpper字符或字符串转大写



unit Unit1;

interface

uses

Windows, Messages, SysUtils, Varian和记娱乐安卓下载和ts, Classes, Graphics,和记娱乐安卓下载和 Controls, Forms,

Dialogs, StdCtrls;

type

TForm1 = class(TForm)

Button1: TButton;

Button2: TButton;

Button3: TButton;

Button4: TButton;

Button5: TButton;

proced和记娱乐安卓下载和ure Button1Click(Sender: TObject);

procedure Button2Click(Sender: TObject);

procedure Button3Click(Sender: TObject);

procedure Button4Click(Sender: TObject);

procedure Button5Click(Sender: TObject);

end;

var

Form1: TForm1;

implementation

{$R *.dfm}

{对字符}

procedure TForm1.Button1Click(Sender: TObject);

var

C: Char;

begin

C := 'a';

C := Char(CharUpper(PChar(C)));

ShowMessage(C); {A}

end;

{对字符常量}

procedure TForm1.Button2Click(Sender: TObject);

var

C: Char;

begin

C := Char(CharUpper(PChar('a')));

ShowMessage(C); {A}

end;

{对字符数组}

procedure TForm1.Button3Click(Sender: TObject);

var

Arr: array[0..2+1] of Char;

begin

Arr := 'abc';

CharUpper(Arr);

ShowMessage(Arr); {ABC}

end;

{对字符串}procedure TForm1.Button4Click(Sender: TObject);

var

str: string;

begin

str := 'abc';

CharUpper(@str[1]);

ShowMessage(str); {ABC}

end;

{Delphi 的 System.UpCase 和 SysUtils.LowerCase}

procedure TForm1.Button5Click(Sender: T和记娱乐安卓下载和Object);

var

c: Char;

str: string;

begi和记娱乐安卓下载和n

c := 'a';

c := UpCase(c);

str := 'abc';

str := UpperCase(str);

ShowMessageFmt('%s, %s', [c, str]); {A, ABC}

end;

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