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发表于 2012-11-13 08:48:12
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1判断语句3 X# w2 `" ]8 v% b4 s+ i A0 H) \
if <condition> then0 ]# C3 S& `5 E! e) r/ [5 m
<statement sequence1>;) e+ z9 \, m. q0 h$ {2 T. b+ w4 n$ i
elseif <condition> then
+ h4 E& ?# ^" y! q& _, E; E% ~ <statement sequence2>;
t/ W* v% M3 K" v# M else 1 O; j; i& b+ a! }/ h
<statement sequence3>;! n" _9 B0 x5 x& `) ~
end;
) Z$ h4 n" d: o* {% e% B3 g9 N# j& h E如果分支比较多，用：
( Q: }0 P0 @* h6 V inspect <expression>2 R8 C# G) \$ U; O2 o* g
when <constant_list> then. h6 C n4 v" V
<statement sequence1>;
/ @ {; Y$ s/ C/ Z) O% _ when <constant_list> then0 }! p: H/ ^- P3 x
<statement sequence2>;3 q3 L; H0 j- V
...; P0 }; ?2 v6 p
else
; w4 _. c( J0 D7 P6 X+ Y q$ U <statement sequence3>;4 F& O( L9 a0 O4 e
end;7 S/ [$ y: b- ~! Q* c
' ]% y1 Z. z3 q9 b" D2循环语句( a% ]5 Y v8 C! F M; S
(1) from <statement sequence1>+ Y/ t) U3 C+ b( U! L$ L, I F
until <condition> loop; z% G% V p3 A* K8 I1 B. u& B* h
<statement sequence2>;, X# v% A- l* N0 `) \; l% r
end;
/ J/ [' E1 U% ] (2) while <condition> loop# E, ~9 r2 p+ Y0 ^0 U# P o
<statement sequence1>;
% {& P( a" Q1 A" p8 p end;
n! _2 ^' r: ?% U' h3 ^- f (3) repeat 1 p3 T7 I8 c. L: I2 p5 c0 B
<statement sequence1>;
. ?1 B; W1 o3 O until <condition>;
$ k6 Y* M3 e3 E( @ (4) for <condition> to <condition> loop
7 d5 V0 h+ t8 ]4 ?/ ` C, |0 z <statement sequence1>;1 G! a" c, r8 V) Z. F
next;# N$ [% A K. ~0 L) M, ?1 N" M1 s
3中断语句
! `/ O0 f6 z( d2 y; {! B( F waituntil <condition> prio <integer expression>;4 A9 X! V2 ` }4 o3 z8 {- j
8 g C6 ^' @* L7 C7 X/ t& X) m9 {! C h, h
以上为常用的函数！
2 X/ \ a& j& h: D还有很多，如有需要我把资料发到你邮箱里 , b$ W+ [5 h0 E( q
: [3 H( S3 L: r" l0 ?
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