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发表于 2012-11-13 08:48:12
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1判断语句6 e4 A5 `% P3 r- I3 P0 p# [! }6 \
if <condition> then/ L% A/ t( F7 x' R, X, h F6 x4 S% |
<statement sequence1>;, u2 i0 s0 P9 @3 X& D
elseif <condition> then
7 K0 ~9 q9 G9 q" J% G* A) z <statement sequence2>;
. \# c8 a4 J A+ {$ s else
. v$ e" M) J' ^+ y1 K) Y1 S <statement sequence3>;
. Z0 j$ k% {; H! z [6 ]! ] end;. A# I6 F0 M3 `8 l+ x& D) V: c) f
如果分支比较多，用：
7 q2 h& o( A* p5 ^# } inspect <expression>
7 J, j; N4 |: d H& w* s8 } when <constant_list> then
* J S( j. e# x+ [* h# b; b& x <statement sequence1>;
' m# F2 l* C/ C when <constant_list> then# B( ?) n! ^2 }8 y% k1 u
<statement sequence2>;4 s8 m0 f, j Z& A; Q3 d. v
...# M+ c7 N* g# ^" X4 q! G
else) X5 i% ]$ {4 O$ ]+ g
<statement sequence3>;2 i+ [; [' [0 N$ b) _
end;2 F, P' b a" c: V8 |
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2循环语句
4 Q# S7 @4 {& D) V (1) from <statement sequence1>
! X: }% v& ] f, K3 O6 U: { until <condition> loop
2 ?) e9 b; b/ l* P! ]( Y+ \ <statement sequence2>;
' j2 x3 t8 }+ y! _" @; E$ V end;+ @8 T* }( x7 D4 E. A2 D
(2) while <condition> loop0 y& _- u+ s% i. i
<statement sequence1>;, Y2 T0 G* W3 n q
end;
3 ?3 D; k4 ?- z5 X (3) repeat * I& v t4 F/ [" Y7 z8 ~" P
<statement sequence1>;3 x7 I2 S' `5 y) X
until <condition>;6 D! O# O& y- K) L2 \
(4) for <condition> to <condition> loop
0 G1 M, s. ]7 ~3 O <statement sequence1>;
$ l M" V* H2 @8 y t8 t4 J( i8 K next;- N/ B4 s2 j: d8 T
3中断语句
0 ]7 K/ s2 P8 T- c+ K waituntil <condition> prio <integer expression>;6 [ @4 n, ?# n) |# Q; p
( ~4 r& N; M5 C) H" d
( j1 D8 ?; D' i以上为常用的函数！
3 d1 a6 M! u* d0 o还有很多，如有需要我把资料发到你邮箱里 9 {' N* |; q8 C- ~) z" u3 J7 Y( f
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