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发表于 2012-11-13 08:48:12
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1判断语句& g3 C6 _; p) V
if <condition> then
$ e, D4 o* O8 D4 _# C. p( Z( Q6 m5 n <statement sequence1>;' c: I5 B: A/ J/ Q# U
elseif <condition> then
1 u$ F! ^/ y; M3 w; ]* r <statement sequence2>;
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<statement sequence3>;* @: o' r) L' @$ U" {3 i, R7 {
end;
9 w8 b9 Y5 @" y" p如果分支比较多,用:
% O3 _: L2 Y5 T1 t1 P inspect <expression>
9 B/ O; T# v+ j5 U, |8 z when <constant_list> then
D T' b6 o% ?7 b <statement sequence1>;
# F* k! l% X4 Q7 D& N when <constant_list> then- E; C) o$ w0 H9 a) G/ M$ O
<statement sequence2>;4 B$ u3 f* t5 c
...
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<statement sequence3>;& I5 e3 B& M4 i1 p8 S
end;
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; D- X( s2 r3 ?& Q6 c- u2循环语句
/ h) T! r4 H( O8 S' q (1) from <statement sequence1>( Y: H6 w( l' X! A' X% |! F
until <condition> loop% I( P, w/ q! e1 O* a5 E7 ?' G0 Z* B
<statement sequence2>;
+ U, G" N# W# S6 k4 b6 h: D% I% Y end;$ a1 S8 v+ ~, ? S! c
(2) while <condition> loop
1 o: \! Z4 T- s# ^; g- k( p' |) ~ <statement sequence1>;
+ Q1 C# t; _' A0 c9 r end;. ?; U2 k2 r% b j
(3) repeat % E% A$ I' X. A1 w$ `$ v. d' m
<statement sequence1>;* U; B; h4 B" o# M5 D8 b
until <condition>;
) ^0 F# _; x3 p! Y (4) for <condition> to <condition> loop
. p$ o6 T8 V$ b- o3 h& g% d+ V+ k( a <statement sequence1>;
+ \/ _5 L, w4 j) k6 K next;- N" H& ]* _* \% g8 y
3中断语句: y2 r2 z7 Q0 m- e
waituntil <condition> prio <integer expression>;
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$ I! d3 L( k b+ E& h% a8 d以上为常用的函数!7 z/ a4 F! T) w: [
还有很多,如有需要我把资料发到你邮箱里 0 f2 S, X, n& j, y
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