function StrToSet(mStr: string): TSysCharSet;
var
I: Integer;
begin
Result := [];
for I := 1 to Length(mStr) do
Include(Result, mStr[I]);
end; { StrToSet }procedure TForm1.Button1Click(Sender: TObject);
var
E: Extended;
I: Integer;
begin
if TryStrToInt(Edit1.Text, I) then
ShowMessage('整数')
else if TryStrToFloat(Edit1.Text, E) then
ShowMessage('浮点数')
else if Length(WideString(Edit1.Text)) <> Length(Edit1.Text) then
ShowMessage('有汉字')
else if StrToSet(Edit1.Text) <= ['a'..'z', 'A'..'Z'] then
ShowMessage('全部是字母')
else ShowMessage('其他情况');
end;
var
I: Integer;
begin
Result := [];
for I := 1 to Length(mStr) do
Include(Result, mStr[I]);
end; { StrToSet }procedure TForm1.Button1Click(Sender: TObject);
var
E: Extended;
I: Integer;
begin
if TryStrToInt(Edit1.Text, I) then
ShowMessage('整数')
else if TryStrToFloat(Edit1.Text, E) then
ShowMessage('浮点数')
else if Length(WideString(Edit1.Text)) <> Length(Edit1.Text) then
ShowMessage('有汉字')
else if StrToSet(Edit1.Text) <= ['a'..'z', 'A'..'Z'] then
ShowMessage('全部是字母')
else ShowMessage('其他情况');
end;
呵呵,好久没见了!!
ShowMessage('整数')
I是做什么用的?
//out参数必须是变量!
var
I: Real;
E: Integer;
begin
{$WARNINGS OFF}
Val(mStr, I, E);
Result := E = 0;
{$WARNINGS ON}
end; { IsNumber }function IsInteger(mStr: string): Boolean; { 返回是否是正确的整数符串 }
var
I: Integer;
E: Integer;
begin
{$WARNINGS OFF}
Val(mStr, I, E);
Result := E = 0;
{$WARNINGS ON}
end; { IsInteger }