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发表于 2012-11-13 08:48:12
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1判断语句) u- g0 f& s0 P; }& o, i
if <condition> then% A1 p& m) U: t+ e2 B
<statement sequence1>;5 w/ }! n! t W/ B/ b: J& A% b; M
elseif <condition> then" @- e( ]2 J5 d# V* P$ E$ E, R6 b) d' z
<statement sequence2>;9 [ c. t- Q i$ y. R6 A- S; i7 D
else
9 O) Y; ^" | }" f$ o <statement sequence3>;* e0 p& j( |$ M
end;9 L- W, ^7 p4 b& d: \+ b
如果分支比较多，用：
5 |# P- ^% \0 X7 U6 ]" k( {! V inspect <expression>- ]+ }/ E" W: R
when <constant_list> then
, P8 m/ B* f% E: W, T3 a <statement sequence1>;
+ `3 i1 ^, n+ Q, d when <constant_list> then/ u/ A6 \2 K& X: c( ]2 N( P6 t
<statement sequence2>;; h; b* X9 l2 N
...& {6 x2 G6 G$ s) j
else; e# i; P% m) w0 E
<statement sequence3>;
. a- C3 W- E0 K+ E! W( Q. E2 P+ nend;
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, y' d9 F8 U5 ^: L3 G2循环语句
# L `/ Q/ s4 ]9 K8 c% I Z (1) from <statement sequence1># t) P% i) L' b% v
until <condition> loop
8 S# g/ u1 i* D* U) ^( S <statement sequence2>;1 _( d" y; i! A3 i3 t5 x2 j) Q7 ?
end;
- o0 S9 }9 V% |0 n (2) while <condition> loop% l& F1 C- @# }1 {8 {4 l
<statement sequence1>;& `. Q3 U- s8 C
end;6 I" j, X4 h3 P% ^7 Q% g* c+ u
(3) repeat
; i% a; v5 F5 S! d" I <statement sequence1>;
6 Y& K9 t' l- k, Q; _( n @2 D" m1 Y until <condition>;! }0 p" X0 s2 `/ R: x
(4) for <condition> to <condition> loop
, b% j6 y2 z! M% W5 ]* o3 B <statement sequence1>;
$ l9 b+ l [$ @% J/ k9 I f next;8 C, u: c w1 k! J
3中断语句
4 L: c& E. J, h+ v" j waituntil <condition> prio <integer expression>;
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1 Y# j! {+ N3 ?
. H2 M5 y3 T3 d) F. S0 T以上为常用的函数！
5 {$ A I" n9 v8 e% `& G( m8 w% U+ ^还有很多，如有需要我把资料发到你邮箱里
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