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发表于 2012-11-13 08:48:12
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1判断语句# X* [ q. B. K
if <condition> then
! m y( m3 O. o# B) _ <statement sequence1>;5 k7 U, y, @* r/ ?0 Z& ]7 k
elseif <condition> then p& k, Z" ^* q5 _% ]2 J# z
<statement sequence2>;
, D$ h2 K2 Q* c+ Y/ E else
; o9 [/ ?) W& e8 V <statement sequence3>;6 u* J& O: q; g( x' Z6 o
end;
! f# D- r, K* y如果分支比较多，用：
5 I) n' ?/ `) ? inspect <expression>
' f0 q/ A' H, E when <constant_list> then
$ {6 y: k. [& S) N+ J8 F' `2 p <statement sequence1>;
8 C/ x V ]$ y( w! ]. [0 K when <constant_list> then
; F# p6 d: @1 q- F <statement sequence2>;) j7 v" p) |- z4 B& @) e& Q
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else
' |4 _2 k: y. O p( l <statement sequence3>;3 Q. y$ [ S, N$ a0 Y9 J
end;4 q7 b! h7 }+ p" G1 l; n3 H% J3 a( o
% Y: Y6 q; i' i/ m2循环语句: L6 |9 s5 c2 n5 T* R+ u4 O
(1) from <statement sequence1>
' q$ [$ k7 k' |3 W until <condition> loop
; _. `+ @* {8 [: I+ @) @ <statement sequence2>;& |. W. n! r0 S6 [/ ]4 m
end;; N4 h1 E g( B! }3 p+ N: J
(2) while <condition> loop
: [' o! l/ X" z1 _: Y4 w <statement sequence1>;
~9 f4 N2 C& J: n. ] end;0 v; ?! a7 P1 J2 z
(3) repeat 1 E [- l1 X2 u! |2 u, a3 ~
<statement sequence1>;
7 I" P8 ]$ ?* |3 H until <condition>;
+ Y7 V! R4 ]8 Z1 l (4) for <condition> to <condition> loop
5 W. v4 ~# r( }; p <statement sequence1>;
* V% V: @( G: m5 H% b4 ^ t# g next;
7 K4 _$ F: B9 r% h3中断语句
C6 K/ [, C7 \ waituntil <condition> prio <integer expression>;. X! m0 _2 c J$ H7 B7 i# k
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以上为常用的函数！- |8 h/ ~5 @& `1 ?1 t2 v
还有很多，如有需要我把资料发到你邮箱里 5 Y/ X9 y4 @1 ]) Q) y) Q/ {
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