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发表于 2012-11-13 08:48:12
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1判断语句 C) ^& q8 v- D8 n7 r. f: [) q- P4 X, ^
if <condition> then7 D) ]0 L% |9 l" w P y1 g
<statement sequence1>;
7 L: {6 y" ? G+ K4 i elseif <condition> then
% {! l' U* J. N. n <statement sequence2>;
9 a" A- ]" i$ V) t2 R else
3 M5 ?) N2 I' g: b0 _ <statement sequence3>;" B j9 ^7 q# E7 b1 ^0 J2 F9 H/ Z$ w
end;
$ e5 w; }2 q }; f4 k$ n( }% t如果分支比较多,用:
' v! m$ P- h" } O& `" p( F6 x inspect <expression>
; n. h9 ]1 j( S; X1 { when <constant_list> then
, Z: x9 c5 M; @% h/ k <statement sequence1>;
. r7 X% ` t: T& w when <constant_list> then
" R+ N; N5 ]# p+ ] <statement sequence2>;
4 h& L( F7 G# X( A' C ...
- O0 I! B* H) m7 C3 B else
) r% D5 `: Z ?& ]- G9 l <statement sequence3>;
; V3 J2 t) j3 \0 s; s) j$ uend;
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2循环语句
8 V3 z# \' L1 k: D$ s3 k5 c- i0 |0 E (1) from <statement sequence1>6 A, F2 P7 `+ E1 s% R" |( H
until <condition> loop; E/ G' X- ~8 {! s
<statement sequence2>;
) ?+ m2 J$ h1 K4 _/ `; p end;& B8 L/ g3 w# F4 T5 y& Y; m7 J( n
(2) while <condition> loop
2 _3 t& ^ h" T" D9 Y7 E# K <statement sequence1>;
: x8 q4 d+ p4 L end;
) f' c& A. v0 z6 a$ ]' O. X (3) repeat
& m% u4 _* J, h* ~6 P! s0 r <statement sequence1>;: k9 d4 T/ Z8 U4 W: V8 B, w: J
until <condition>;
0 t, V) s: Y! F1 Z8 r7 g3 }; H (4) for <condition> to <condition> loop
7 C/ o* O b) D" }# H$ s9 V3 O8 @. @ <statement sequence1>;2 s, ]% F! M; B* t% q7 a$ n
next;. f7 W" \! Q; _) e3 N3 q. {8 P" I) W
3中断语句8 Q1 d* m D7 d: E3 L
waituntil <condition> prio <integer expression>;. N1 @2 O& H0 z3 w! J8 f$ t
0 I3 C1 A0 Q7 r o4 `
% v% w! s5 c. y1 P4 n, n+ q: {以上为常用的函数!# b! v% i- m5 ~
还有很多,如有需要我把资料发到你邮箱里 2 X1 f8 Y5 x2 l( I
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