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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句
. b0 N" |5 x: V if <condition> then* f2 k9 u" I! _
<statement sequence1>;- V. k. A+ P( r6 `$ D1 F& F) Q
elseif <condition> then- {8 ^0 P, z/ _# A8 B
<statement sequence2>;) v& Z+ y# C/ W) }" d& G
else 6 Y# [4 u/ O! l: m: A
<statement sequence3>;
0 e3 L4 M& t. { s- t/ n( ~ C end;
/ r! v$ G) K8 D* q9 h; }如果分支比较多,用:
6 {1 ^; M# _: K% O inspect <expression>2 o% x5 ?" V7 X2 D) d6 g
when <constant_list> then, z( x: v( f9 @8 z8 F6 n
<statement sequence1>;# f) H4 @3 Z2 T8 C
when <constant_list> then0 p1 K# J" q- n' l0 J
<statement sequence2>;: f, ?0 B Q. c8 G
...
! ], A1 |0 I1 h1 u else
# {5 g1 v/ m3 V! X" t& i <statement sequence3>;9 X$ o4 c9 `7 K/ Y+ d% ]. C7 m
end;" N& r& P6 P3 S! F5 ^. O
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2循环语句9 }" m% A% b C! D' ^: K8 P6 D
(1) from <statement sequence1>
: B1 u4 M/ E; F$ k4 | until <condition> loop# q5 ?7 y3 r2 z' @/ ~- H& Z3 N9 s
<statement sequence2>;
8 l% i/ l0 c+ A' b end;
0 c) l6 ~1 N% `3 |6 Z3 U% [ U (2) while <condition> loop
/ t% s' R2 ?( [) o& p9 N <statement sequence1>;
# v6 B0 }) b+ V. h, f end;0 [- m7 P$ i% {7 z: A
(3) repeat
/ N. E% L, v3 d% v# H <statement sequence1>;2 Y4 ]) Q+ W5 o4 ^
until <condition>;
8 i, [+ ^& A4 [: C* B9 S (4) for <condition> to <condition> loop' d0 p0 W3 a1 }* o2 Y
<statement sequence1>;; ?: j( S& l. k& [' s
next;9 [4 }; d3 v; Y7 s5 T' h$ j
3中断语句
4 j0 \" J4 m6 M' _ waituntil <condition> prio <integer expression>;4 @+ X) Y; v" V8 Q% @ X1 U
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以上为常用的函数!- _& z' D# m0 v+ k
还有很多,如有需要我把资料发到你邮箱里 8 q/ u: p- f, `1 c0 h* o6 P y% G
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