delphi 'Char' and 'AnsiChar'报错问题

Posted 2023-05-09

[DCC Error] 自动关机.pas(51): E2010 Incompatible types: 'Char' and 'AnsiChar' 这个报错貌似在 delphi7里面是不会报错的吧？请问能不能详细的告诉我一下 这个错误的解决办法？Char 和 AnsiChar 怎么变成了不同类型呢 要用函数转换吗？

你用的什么啊！如果不是d7那你只能全部声明为AnsiChar了，高版本delphi Char默认是WideChar 参考技术A Delphi中有
PChar, PWideChar, pAnsiChar三种形式
在 Delphi2010 之前，默认PChar是PAnsiChar，之后默认都是 PWideChar
如果你当前版本报错，你就要具体指定是PAnsiChar或者是pWideChar了

Difference between Char.IsDigit() and Char.IsNumber() in C#

http://stackoverflow.com/questions/228532/difference-between-char-isdigit-and-char-isnumber-in-c-sharp

Char.IsDigit() is a subset of Char.IsNumber().

Some of the characters that are ‘numeric‘ but not digits include 0x00b2 and 0x00b3 which are superscripted 2 and 3 (‘²‘ and ‘³‘) and the glyphs that are fractions such as ‘¼‘, ‘½‘, and ‘¾‘.

Note that there are quite a few characters that IsDigit() returns true for that are not in the ASCII range of 0x30 to 0x39, such as these Thai digit characters: ‘?‘ ‘?‘ ‘?‘ ‘?‘ ‘?‘ ‘?‘ ‘?‘ ‘?‘ ‘?‘ ‘?‘.

This snippet of code tells you which code points differ:

static private void test()
{
    for (int i = 0; i <= 0xffff; ++i)
    {
        char c = (char) i;

        if (Char.IsDigit( c) != Char.IsNumber( c)) {
            Console.WriteLine( "Char value {0:x} IsDigit() = {1}, IsNumber() = {2}", i, Char.IsDigit( c), Char.IsNumber( c));
        }
    }
}