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发表于 2012-11-13 08:48:12
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1判断语句3 J$ h1 T9 b+ p0 ~! v
if <condition> then% }7 e1 v" a3 B2 {4 J
<statement sequence1>;
, d+ ` I s* k7 i1 r) d+ n elseif <condition> then
1 {! c* U! q# W. @2 z! x" T g <statement sequence2>;& O6 e8 N, Q3 t" L* G
else 8 @. x! F! R. Y8 w% I) Y' m6 p$ U! ~
<statement sequence3>;
- L0 J8 n( F& p: @! k$ z end;
0 O- R* p) z. S如果分支比较多，用：
7 w" H9 S# r: A/ N8 x# Z inspect <expression> S0 K9 ^5 Z4 ^, \1 d, R+ e8 G
when <constant_list> then
9 I7 A* W1 l8 S, m! J/ _ <statement sequence1>;: t- B7 W- j" @4 L! O
when <constant_list> then; X7 i, ^/ O2 ^, D) x% d) }
<statement sequence2>;, t0 r. v2 x3 I: U
...
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<statement sequence3>;
; @# C" u3 O+ J- Gend;+ ?8 P" d0 I6 ~5 j
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(1) from <statement sequence1>
# s, l' o+ [0 b$ h until <condition> loop
. k7 U# E# v6 R1 j" A4 r <statement sequence2>;
/ L( p% r j# |- S7 a$ F end;1 u4 ]; s' x3 R9 q9 o6 L+ r
(2) while <condition> loop
2 G% l, D, z2 s7 @; |" F3 { <statement sequence1>;: @/ I+ m/ v- a8 _) B% n4 R
end;! o1 B/ Y- ?5 A9 e* F8 p9 f/ | q5 `
(3) repeat
* K- S+ Q% F( N3 a <statement sequence1>;
$ P/ U" L6 g2 L until <condition>;
. x) }* N F2 M7 s5 Q (4) for <condition> to <condition> loop
+ \. U" S* u. [+ N <statement sequence1>;0 L* t/ N; O6 y/ N7 Z
next;0 Q6 a, H$ \& c3 |% F+ n! b
3中断语句
Q, R2 Q/ x! Y0 { waituntil <condition> prio <integer expression>;# e5 M! h4 n% x' \+ O
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- l( A+ d1 H* `# A' N' i+ C/ W以上为常用的函数！
. E2 e4 _ |+ F* w s还有很多，如有需要我把资料发到你邮箱里 ) |) Q& g0 F5 J
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