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发表于 2012-11-13 08:48:12
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1判断语句# I5 t! q' ~( W* B( _
if <condition> then
1 K, E. R G. n* g- a+ Z6 K: n <statement sequence1>;
$ m- c1 g: |, L2 X7 E2 t5 T' n elseif <condition> then; ]5 T4 x+ e, y$ L- B F" @
<statement sequence2>;
; Q6 F, D. R9 m else
& r6 P' Y) |9 z# i7 s( r& O <statement sequence3>;4 G1 f s! Z0 _8 O9 |6 I; F2 M# }
end;
) @5 m. H0 ]: C) u& ^如果分支比较多，用：
( W/ W- {9 d$ v e inspect <expression>$ O* `3 C# I* c
when <constant_list> then/ x1 w* w0 |4 | Z
<statement sequence1>;3 e6 @# h& z+ m [+ k7 M# L6 D
when <constant_list> then
3 E2 K+ t- B# O+ \" J p <statement sequence2>;
9 O5 O! P" w: F% J! Y& R ...
6 U8 _9 d. r; T else
0 M* Z7 g5 h( I, R <statement sequence3>;7 Z& D# P9 p3 d0 l* S, |
end;
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2循环语句
/ e n' [# `; t. h, F (1) from <statement sequence1>
- z5 V6 H* Q* w/ r/ p ^ until <condition> loop
3 U; ]' \/ W$ X! i1 Q& E! } <statement sequence2>;3 g. q8 Y% n/ S1 U1 m
end;
5 J' [0 a+ d& K! P0 X+ d$ v (2) while <condition> loop
/ S: o) M6 ~& J/ Z7 [5 z9 H$ ~2 u <statement sequence1>;
3 J- R" {. y" {4 C4 l7 n end;7 F1 G; ]1 x+ j
(3) repeat 3 K2 c! W9 ?- n" |& b7 x% l* ^+ j$ y g
<statement sequence1>;
" _, g. p; W' w) d3 I. W, X- K until <condition>;
$ G" W' X# Q! ~! D/ n5 X# @/ H (4) for <condition> to <condition> loop
5 f4 o' _( F/ f. Z" \ <statement sequence1>;
) `2 T* ^ G' R- ~ next;
% G# w2 X4 T! J1 r3中断语句
* { N$ P# O/ z) y' O waituntil <condition> prio <integer expression>;
+ W2 `8 B5 X5 H+ |1 W7 w3 L4 C, b" O% d2 p- y
/ x$ Q8 K3 n I8 u" d u! _
以上为常用的函数！$ ^+ Q5 \: z% f+ S
还有很多，如有需要我把资料发到你邮箱里
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