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发表于 2012-11-13 08:48:12
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1判断语句- w& H/ `% X5 H! c2 Y& ^2 {6 l' e
if <condition> then
' N% D9 R- k4 N5 |, h# H8 S3 l <statement sequence1>;: ]" `9 A7 F% A4 y2 i# l+ g' s
elseif <condition> then
4 V3 e1 l4 N# x1 [; Y8 e <statement sequence2>;
) a! M: ^4 y4 S6 Y6 I- C else
# g6 [. _8 w: S% h# x <statement sequence3>;8 _$ L0 f$ V6 \$ L
end;
$ @; B; R! k8 t% s4 |5 P如果分支比较多，用：
) H- Y3 @/ V. e' @ inspect <expression>
* S* m% g% ^8 H6 T6 `5 p) \* V0 I when <constant_list> then4 A1 s' Z3 v p' y
<statement sequence1>;
2 H' M+ `. g' B! M when <constant_list> then" n6 _3 a* {3 h
<statement sequence2>;- J( C) C+ a( \/ r/ a, c+ k
...
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<statement sequence3>;
9 p8 ]4 `% `# Eend;/ t8 ]7 ^' E2 \
5 D) y4 h& `; R* o7 M7 j" R2循环语句
( w' o( j! l u) ?" U7 ? (1) from <statement sequence1>
" R( e( Z7 G- j, t% p until <condition> loop# j K! H! H( R3 k* r* g/ n6 U4 g
<statement sequence2>;% d; }+ E/ U! [* d7 K
end;8 c" H! y4 D4 g/ r- |
(2) while <condition> loop
3 v; v* t9 ] _; ^ <statement sequence1>;
# i n+ o8 w% P7 S end;- P5 |+ I& \# p! S
(3) repeat
+ `9 x1 u3 Y1 V, v1 g. r <statement sequence1>;% y1 O% f" W) B- y" }3 r
until <condition>;
1 H; |; ~, F5 v9 s/ h (4) for <condition> to <condition> loop/ O; x5 y% ?$ i5 k
<statement sequence1>;
) _- n1 ] ^1 T* _2 g next;' C: E% v! S( c( M& A
3中断语句
0 K, S" N0 b6 g( I6 u, O7 ^" @& j waituntil <condition> prio <integer expression>;
5 q5 Y) |4 y8 W6 P2 K5 t' u+ d% R- j, Q; z2 r8 N
* J# ?% g7 B: U+ b/ H以上为常用的函数！% C8 z4 f/ p6 Q+ t' F' ?
还有很多，如有需要我把资料发到你邮箱里 & w* W4 z5 y K
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