Basic Pascal Tutorial/Chapter 3/CASE/zh CN: what changed

Revision 1 to 2. Removed lines have a minus sign; added lines have a plus sign.

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1	1		3Cb - CASE语句 (原作者: Tao Yue, 状态: 未更改)
2	2
3	3		根据条件执行CASE语句。CASE语句计算每个表达式，以进行选择，它可以是[[Const/zh CN\|常量]]、范围，或将它们以[[Comma/zh CN\|逗号]]分隔的列表。用[[Colon/zh CN\|冒号]]分隔每个语句块。
4	4
5	5		假设一种分支方式是：如`b`是`1、7、2037、5`，你可以这样：
6	6		```
7	7		if (b = 1) or (b = 7) or (b = 2037) or (b = 5) then
8	8		语句1
9	9		else
10	10		语句2;
11	11		```
12	12
13	13		在这种情况下，使用`CASE语句`会变得简单：
14	14		```
15	15		case b of
16	16		1,7,2037,5: 语句1;
17	17		else 语句2
18	18		end;
19	19		```
20	20
21	21		`CASE语句`的格式是：
22	22		```
23	23		case 选择器 of
24	24		列表1: 语句1;
25	25		列表2: 语句2;
26	26		...
27	27		列表n: 语句n;
28	28		else 语句;
29	29		end;
30	30		```
31	31
32	32		`else`部分是可选的，`else`表示其他情况。
33	33
34	34		选择器是一个有序数据类型的任何变量，但不能使用实数。
35	35
36	36		Note that the lists must consist of literal values. That is, you must use constants or hard-coded values -- you cannot use variables.
37	37
38	38		（~~注意，该列表必须包含文本值。也就是说，您必须使用常量或硬编码值——您不能使用变量。~~ ）
39	39
40	40		[[Basic Pascal Tutorial/Chapter 3/IF/zh CN\|上一页]] \| [[Basic Pascal Tutorial/Contents/zh CN\|目录]] \| [[Basic Pascal Tutorial/Chapter 3/FOR..DO/zh CN\|下一页]]
41	41		---\|---\|---
42	42
43	43		---
44		-	From the Free Pascal wiki, page "CASE/zh CN", as the Internet Archive kept it on 2023-03-22. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).
	44	+	From the Free Pascal wiki, page "CASE/zh CN", as the Internet Archive kept it on 2023-03-22, last changed on 2022-08-20. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).

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