Pascal - 字符串到LongWord [英] Pascal - String to LongWord

问题描述

我的号码是字符串。
如何将该字符串转换为LongWord？

I have number as String. How to convert that string to LongWord?

我知道如何将其转换为整数。但是整数对我来说很小。

I know how to convert it to integer. But integer is to small for me.

推荐答案

实际上你可以使用StrToInt。

Actually you can use StrToInt.

结果值将溢出（即对于高于$ 7fffffff的值变为负值，您可能希望禁用溢出检查），但是当它被转换为longword时，您将获得正确的值。

The resulting value will overflow (i.e. become negative for values above $7fffffff, you might want to disable overflow checking), but when it is casted to longword, you will get the correct value.

虽然低位Val可能更安全：

Although the low level Val might be safer:

var
  x: longword;
  e: word;
begin
  Val('$9fffffff', x, e);

  writeln(x);
end.

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