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发表于 2012-11-13 08:48:12
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1判断语句' E( J5 ^' A/ m k4 ^/ s) {# T' v. M
if <condition> then
: w" o* t$ W, K4 r$ y <statement sequence1>;$ I- n( d; {" V* F k
elseif <condition> then
. A1 K, E( V8 Y- q. g# M <statement sequence2>;8 y, ], p8 G/ K- q @. n
else
/ r9 b7 z- q* w- W& Y1 \ <statement sequence3>;* z V# F M" P9 l
end;- A% \% q2 d) F/ }/ c* c6 v
如果分支比较多，用：
, N, A6 A3 p/ j; q4 j inspect <expression>
6 A0 y' Q: R$ ~+ ], `4 x# G when <constant_list> then" W/ D- F2 q4 f& \# w
<statement sequence1>;
3 g" N- R) g5 }, _6 d when <constant_list> then
: w9 [" i9 a- K1 M1 j: `3 } <statement sequence2>;
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else' o" o, P- \) E. m7 V! r
<statement sequence3>;, t5 S2 |: Z( V/ a' ^/ B& C) j
end;+ ?* A+ Q( N/ W5 D. B1 l: v
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2循环语句 M. ?1 {5 B5 f& K
(1) from <statement sequence1>& N) F0 b" ~$ ?0 Z
until <condition> loop
9 F7 |- R5 Z- L <statement sequence2>;) J4 C. \, ^- v5 [9 ~ U# l- i
end;& O, H( A# p' x a- @
(2) while <condition> loop: c: S3 l3 v! V7 y+ o
<statement sequence1>; t+ \3 D$ V- Y" H7 m
end;
' ^0 p7 G8 q- c3 ` (3) repeat 7 A2 f" l. U7 {2 o3 [* I' ?
<statement sequence1>;
* \1 j) t, L* z until <condition>;
7 q& B* D# D% _! [5 C (4) for <condition> to <condition> loop
* f# K$ }7 B, m& t, b/ c5 e7 L <statement sequence1>;: h. Z4 |+ l I5 l
next;! c6 G' q( D0 ^, K; y9 J/ h7 Q
3中断语句" B9 x2 E" [* V% A: ~6 o5 O
waituntil <condition> prio <integer expression>;9 ?: `$ g8 p( L7 s
4 R2 H' q& Q6 z$ }+ j q" b7 P* i
6 N% Q& q! S$ g2 N1 J以上为常用的函数！8 W$ v, ], ^" B0 O7 I
还有很多，如有需要我把资料发到你邮箱里 $ j) @5 j3 X9 c* y- ?, ]
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