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发表于 2012-11-13 08:48:12
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1判断语句
& w& E/ |) ?- T+ q) q" L8 T if <condition> then
, b0 u, Z3 }& ~& A+ a, L <statement sequence1>;
5 o% m" S4 Z9 l6 B/ Y elseif <condition> then+ G" k; P4 p1 Q/ n5 s# \$ |& Y; A
<statement sequence2>;% L) f7 S6 S9 W9 t7 b
else
# s' e* c# |) ? s6 w <statement sequence3>;
. K0 G# G, I+ ?" N& m6 u2 B end;
& \5 l1 f7 b! y% N' @如果分支比较多，用：
9 B) q2 Q- Q4 o inspect <expression>: J; H- G6 j2 Z5 z) t0 a5 Q, J* T; Y
when <constant_list> then' v, h# G/ a# G
<statement sequence1>;
9 @6 `5 i5 I6 I) K/ S1 n when <constant_list> then
2 G0 Q2 H, K! o4 O2 z- m <statement sequence2>;
, l% J) n& r" b; R ...
8 Z# `; Q, ?0 I! O, ? else8 k' S; r+ R1 V1 C& d* t
<statement sequence3>;( L& [! G) X; P
end;
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2循环语句! {) s1 J) Q& T6 z
(1) from <statement sequence1>
5 s) ^* C X$ N$ V1 c until <condition> loop4 e7 m5 P2 \% r9 t
<statement sequence2>;
. m4 t+ q1 u9 P end;' s4 I% A; z3 d% `% C7 W9 @& c. u
(2) while <condition> loop
3 z. m5 f' t: |& Z <statement sequence1>;
, v% @( H1 J' u* e! X3 h* T end;. e1 @7 N# ^( `8 g4 I7 q. `, V) w
(3) repeat , S" h/ J' u+ K" T; v2 Z
<statement sequence1>;
: `) Z3 j( ~2 [' ^! ^" r until <condition>;
/ b4 e/ x8 }2 F3 Q8 o3 e (4) for <condition> to <condition> loop3 X. P, A& z; g% n/ i5 w
<statement sequence1>; X. Q$ W0 e0 [4 Y
next;3 _3 F: X& k) Z/ }. a
3中断语句
" z( ]* l5 T/ L9 D waituntil <condition> prio <integer expression>;8 ~$ V3 W1 |; E; H- S7 @# b2 o8 e
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p3 X3 n2 W f
以上为常用的函数！
1 ?, j2 z$ r' B$ h* Q! N; I还有很多，如有需要我把资料发到你邮箱里 ; k* }. h! H0 C5 b
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