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发表于 2012-11-13 08:48:12
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1判断语句$ H6 N: O9 T! ^0 J7 t" Q7 p
if <condition> then {- w* F& C) ~( v. v [! J
<statement sequence1>;; @/ ^1 J2 R9 H' j/ v% m9 t
elseif <condition> then
5 V7 a/ j1 S9 [+ R5 o5 d <statement sequence2>;
5 C# ~) V7 x6 e$ P" d else 7 |# z3 Y) ^: A5 P% k
<statement sequence3>;9 Y2 g1 O3 p; ]9 @9 _' y
end;6 u! K9 S a- Y3 `. E
如果分支比较多，用：6 Z% H7 Y }0 v
inspect <expression>
5 h0 ~1 D+ ?" t when <constant_list> then
! I: Y$ b& T3 @8 ^* V* A7 c% m <statement sequence1>;
- G3 M; u8 d v; { when <constant_list> then" Z( c: h4 g/ A+ B$ z, t
<statement sequence2>;
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else% B/ q+ K; ]/ o( h9 N
<statement sequence3>;. U: ?& V* G, U
end; h' U2 o: S1 g; B
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2循环语句
' W- |! U& O4 M (1) from <statement sequence1>6 w8 p) u- }' J8 W
until <condition> loop0 X$ w% x% ~8 W1 |
<statement sequence2>;
# o4 z! ^) V/ n; ^5 w Y end;
' _ N# `7 V u' | (2) while <condition> loop* ]* f [0 ^, j* Q8 S
<statement sequence1>;7 T1 j8 \/ b/ O- L3 j
end;
7 _& d; R3 {8 ~) I (3) repeat
# p% w- ?/ F4 c3 w$ R* R <statement sequence1>;
! N' [. E% w! I$ J until <condition>;
( w# j8 q) v o7 E$ z: H0 h- m2 l3 s (4) for <condition> to <condition> loop4 d6 I- r a' q9 J
<statement sequence1>;
* U9 G0 q7 z# Z2 M next;
% _- n, w0 q5 z3中断语句
4 Q( _8 c$ O" L/ ^ G% H# L* Q6 U waituntil <condition> prio <integer expression>;4 I% z$ J5 P. U) u* C" {
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以上为常用的函数！ {( F0 @; `, F8 z# @
还有很多，如有需要我把资料发到你邮箱里 ; G! T6 r7 D1 w# [* |3 N9 U5 Q
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