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发表于 2012-11-13 08:48:12
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1判断语句4 n" K# P7 x4 d9 }6 ]
if <condition> then
$ G, b5 K; T, r8 x+ f( W0 s9 j. x. i a <statement sequence1>;
& y/ m! Y2 @" j( J3 Y+ t elseif <condition> then
& v0 i4 [' `* i* }% m; n* M0 Z <statement sequence2>;
* M; Q) o/ d3 r% I' [" k else
7 [* @; m+ Z, L5 F9 t, b0 V <statement sequence3>;
" Z/ R, u2 |* N: E ` U& H+ e$ i end;+ }% R9 T g! R5 h& [4 I
如果分支比较多，用：
: V) t& f# Z* E inspect <expression>$ g4 @! S4 f! R! C( ^
when <constant_list> then
8 l& w* I, |2 v5 T% P' z <statement sequence1>;
2 W6 f) H: R, P) C when <constant_list> then( g Z! Y( A' \
<statement sequence2>;
% a5 H y& o y ...
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<statement sequence3>;
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- }0 c% t4 @$ I/ @ S* f2循环语句
4 ]) X( T, o, m# K; Q0 F* v (1) from <statement sequence1>5 f: g' i4 B0 G% x, j
until <condition> loop( j6 c. y, C+ y) p1 B
<statement sequence2>;0 A4 E7 n4 R8 T, S& l: Z
end;
5 G" Z1 b4 r3 q; ~% ?# m" h: D" h (2) while <condition> loop
5 X" [( d/ ?% C8 s <statement sequence1>;
7 l& E! w; v; g. R, p3 q end;
7 ~4 f1 E3 Q# Z (3) repeat 3 H; N4 t- @; _2 I( r4 q! K
<statement sequence1>;; I( ]) {! t) W& r5 [" C
until <condition>;
; E# B; m0 \+ ^- I (4) for <condition> to <condition> loop( k. w- {: u! b9 r0 ~% F( l
<statement sequence1>;
6 ?! i d* Z* d7 b6 Y9 U3 } next;5 E1 h% H$ [. k* u( m6 `
3中断语句
4 f4 B+ L& S% @7 j+ S+ n+ k waituntil <condition> prio <integer expression>;+ e# r* w, W" s5 f: l# w4 G: e6 L
+ ^1 i, v$ o! w* X' V
7 F& H$ ~! A$ d# {
以上为常用的函数！
. L4 T0 n9 r5 ], R" H还有很多，如有需要我把资料发到你邮箱里
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