How do I define a range of floats?

I want to define a percentage type.

TPrecent = 0 .. 100; works fine, but I can only assign integers to it an开发者_如何学编程 dwoudl also like to assign floats.

How can I do that?

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Ranges can only be integer ordinal types. You will need to use a float variable and validate the value yourself.

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TPercent is an integer sub-range. You cannot create a sub-range that is a floating point underlying type.