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发表于 2012-11-13 08:48:12
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1判断语句
( d+ Y2 F: ` Q4 [$ y9 s if <condition> then
?' m! i4 ^* c1 H1 S9 _ <statement sequence1>;: w6 s# R8 F: G; ^4 Q+ C
elseif <condition> then) H. Y, B3 G" h
<statement sequence2>;
! B' ]0 f0 x" R4 ^& C else
0 Z! s9 P( s0 f# a# S <statement sequence3>;
; t, |; x% P1 O end;; ]9 J5 _1 X7 t* ?
如果分支比较多，用：
. K N: l( K) {! Y inspect <expression>
6 R. z2 q1 p3 C" {( y- d when <constant_list> then
& H( j# H& H! a6 M& f <statement sequence1>;
, D! A' ^) R; v when <constant_list> then |! i5 J( v O+ ^
<statement sequence2>;: _9 Y0 I& H, c3 G. v
...
/ C, H! d( @3 E* Y# g8 E, c else
7 r9 N# I' S; C <statement sequence3>;* H' p5 U$ F) t# ^# e
end;
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2循环语句
, w5 C+ w* F* q& ~( X2 T9 K$ Y (1) from <statement sequence1>4 G/ }# Z) o0 ~7 t3 W& m
until <condition> loop1 c/ r7 V- R5 r* Q. H9 }2 o
<statement sequence2>;
7 ^! L) y; ]! }! q end;
6 d# A2 @+ Z2 V (2) while <condition> loop
+ s' X& ^6 M1 n' } <statement sequence1>;
) z+ m( K1 n0 c4 t end;7 c$ B# [; ~6 W8 l* g4 g' g8 S
(3) repeat
8 z% @! z+ {* }% C# L! a6 s <statement sequence1>;1 A! W) g( P# l1 F9 O
until <condition>;
5 o$ h# W1 r/ G: m# y; d4 c4 Y; z (4) for <condition> to <condition> loop
5 r( L, V2 |: f4 G6 F! _" \ <statement sequence1>;8 y" l# \7 n N1 l6 Y u
next;
& T- C% m1 m4 l5 S8 Q* C: p5 X3中断语句
2 a ?, A) f5 e( a, u2 H waituntil <condition> prio <integer expression>;$ A3 x) @ C" a5 E& x+ }
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以上为常用的函数！
. @% Z0 p3 U! @5 E. M2 y还有很多，如有需要我把资料发到你邮箱里 . k" X5 [) T7 \5 k: g
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