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发表于 2012-11-13 08:48:12
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1判断语句
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<statement sequence1>;+ r* A2 @% D# O4 j( N# G
elseif <condition> then
2 h7 c6 }3 x: n# t Q6 U% } <statement sequence2>;
4 i$ h; |; d, s# t7 s else 6 M2 S7 U& h/ J: w9 j) ~+ [0 I# o
<statement sequence3>;; J k' D' D9 s( ^3 V% \
end;
2 _- V0 Y9 ]% {3 M# ?如果分支比较多，用：
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when <constant_list> then
# T6 n) P0 D+ Y <statement sequence1>;3 t/ I! Q) b0 w! k7 |
when <constant_list> then0 q3 m% f/ z' F0 W& r" i
<statement sequence2>;
6 h$ d& ?% x+ Z. ]8 P# c/ R) ` ...
1 o4 Y0 L- @" o, \5 f else
: m* q& k5 y; n* z, X% A, C <statement sequence3>;
/ z2 P9 ?3 H$ j! Lend;
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2循环语句# n3 m+ ^* J# ` A3 B% D
(1) from <statement sequence1>! u5 r! A* z5 z2 q: u
until <condition> loop4 T! _0 o% G8 ]# ?3 U3 Z
<statement sequence2>;9 H0 A6 Q- ?5 f4 U
end;
$ D4 c( g4 z" J: h7 Y( V/ a8 J% |; a% O (2) while <condition> loop0 {9 B2 T) z# r0 d
<statement sequence1>;! m. T9 ^" W6 @7 P% p
end;
7 M3 @0 z: c- ]% A6 ] (3) repeat
% g2 r! r, t; i <statement sequence1>;
; Q4 v- C; f: i' `0 ? until <condition>;
; \( i1 k+ a( F (4) for <condition> to <condition> loop
( ]% V6 v2 z+ R3 N1 [4 ? <statement sequence1>;. q5 X+ }# M8 b' m) s8 q/ z8 g
next;
4 a' b! u! T% J) Z. e) m3中断语句
4 @0 x9 @- Q+ R; o# `1 W5 Z3 S) \ waituntil <condition> prio <integer expression>;& P- |( s$ c$ y' ?7 T m
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4 j4 q8 T+ U" @( b S% ^以上为常用的函数！
: g1 w6 H; D# n$ X9 J! g7 ?( @, }还有很多，如有需要我把资料发到你邮箱里 5 c6 u( H/ x1 w A- x, h
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