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发表于 2012-11-13 08:48:12
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1判断语句
3 }+ K! h% r9 K2 n if <condition> then
% `9 G" c9 j5 b <statement sequence1>;
1 d6 O7 Y8 Y+ w/ f" P5 X elseif <condition> then
& \+ d2 v; |, z* T4 y \# R <statement sequence2>;
; Q, I: N# B: u- ~8 `, T/ j! } else
9 R/ M" l! J: [( h0 c3 Z <statement sequence3>;
6 y' S) V8 ] {$ z end;
" J1 c5 r1 c& \% C5 ]如果分支比较多，用：
: B8 P/ X, K$ G' b% f' a- w* x* ~ inspect <expression>4 k$ t+ O1 g G2 ?2 |7 S
when <constant_list> then
m) T( M1 y& T' s. g <statement sequence1>;
& y( Y5 m) ~% R% n/ M, I when <constant_list> then9 z& H- A4 ^* S6 G1 Z k1 S2 ]$ Y
<statement sequence2>;
* l2 X# D7 ^. d- t+ [5 j# r ...
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<statement sequence3>;$ [4 R8 v# z# n; j
end;
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4 Y4 }1 u# L' N2循环语句
5 `7 \) P Q8 t: `$ D+ J3 } (1) from <statement sequence1>
" n W% x1 b$ x% `; } until <condition> loop
6 j' R5 C s5 r <statement sequence2>;
$ j' u: p$ E$ u6 N4 [ end;# }* U* j+ @: x" |/ y, V* I0 A
(2) while <condition> loop. s( H) h: c( q% U2 ]) |; Y
<statement sequence1>;' [6 R/ q5 q5 G$ D- L2 {
end;
% t& L1 z7 Y3 B# Z# S (3) repeat $ `5 m7 m; h: }' W4 T
<statement sequence1>;; |! I$ Z4 Y2 U& _( r& z% u
until <condition>;4 j$ m7 N, B. h
(4) for <condition> to <condition> loop) A; d# a ]" t: M, M7 T! p& U' D
<statement sequence1>;
9 F* `+ z9 H2 `; v' r next;+ [# \* K, g @+ j5 I' q8 b9 ~9 t
3中断语句
# U. b$ W* I, o$ b waituntil <condition> prio <integer expression>;
' J# z% w+ O: T1 X @
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以上为常用的函数！5 I h5 J6 R4 g. a) V3 D# u
还有很多，如有需要我把资料发到你邮箱里 $ {# T! v. I4 Y( @4 P0 g
% h- R% c4 _9 r# v/ \; @5 C
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