比如一个变量，我想判断它是不是在1到70之间，用代码该如何实现？

if VAR1=1..70 then

这样不行啊

用in

[此贴子已经被作者于2007-2-7 17:50:06编辑过]

你在delphi里面找关于集合的内容

我找到了点，你看看.

Because of the size limitations for base types, set types are usually defined with subranges. For example, the declarations

type
TSomeInts = 1..250;
TIntSet = set of TSomeInts;

create a set type called TIntSet whose values are collections of integers in the range from 1 to 250. You could accomplish the same thing with

type TIntSet = set of 1..250;

Given this declaration, you can create a sets like this:

var Set1, Set2: TIntSet;
...
Set1 := [1, 3, 5, 7, 9];
Set2 := [2, 4, 6, 8, 10]

You can also use the set of ... construction directly in variable declarations:

var MySet: set of 'a'..'z';
...
MySet := ['a','b','c'];

Other examples of set types include

set of Byte
set of (Club, Diamond, Heart, Spade)
set of Char;

The in operator tests set membership:

if 'a' in MySet then ... { do something } ;

Every set type can hold the empty set, denoted by [].