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发表于 2012-11-13 08:48:12
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1判断语句' c4 h# p! L: P r' m9 y
if <condition> then
* I+ G4 ^9 f6 {8 ~- L& G* @ <statement sequence1>;
# `7 \ b' e* G- p# a elseif <condition> then' s% q% g. d8 @/ _, @2 j' u9 E
<statement sequence2>;
9 I' x0 S+ @) f, e4 \" A5 {9 h% U9 \ else
b! j; h) X( u' w: e7 y <statement sequence3>;9 ^0 s/ E4 D8 T' x7 H- J f2 O
end;
; e; x# i7 }8 g/ ~$ J1 ]如果分支比较多，用：
' r1 J3 `& \- p, j' k' Q. ~ ? inspect <expression>
' S$ K5 c6 C5 m when <constant_list> then
! b$ J0 A: k3 L$ U <statement sequence1>;! Q. A( i5 b- p" V8 V; W4 I
when <constant_list> then7 k5 S" Q$ f3 J- d
<statement sequence2>;
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else
0 I2 _; j6 _" w, Y* r/ m. I <statement sequence3>;% S. f6 d, C& N3 w7 I l
end;+ I6 p* k/ g6 i
; ~+ f5 ]- D6 Q/ v7 }, O2循环语句3 d5 `# O2 J3 L# D/ d0 R
(1) from <statement sequence1> x: i( d1 m4 w4 b
until <condition> loop
( J& _9 ~4 q4 y. R <statement sequence2>;2 D4 j& }& x; ?! B- S
end;
" u$ C/ x4 z& N$ W d/ {) T (2) while <condition> loop
$ `4 Z) K6 |! K; l7 A7 r <statement sequence1>;
. B0 ]% T2 E& n$ @. o6 j end;8 K, e5 c; \, o# O
(3) repeat
# \6 d* a1 G) I3 m <statement sequence1>;
4 _) \( a7 s; O, S0 P until <condition>;
% [( \; c5 o: ^; _! Q6 W; u (4) for <condition> to <condition> loop
9 j% n% U1 C1 }2 O$ t* K <statement sequence1>;% Z/ O" Z2 b4 c1 e2 c0 ?: o
next;
0 `/ M& t( ?. P" \3中断语句 F2 v9 N; R; c; A
waituntil <condition> prio <integer expression>;& g" e: r' A6 V
f$ \9 u1 `1 C! W* U
# Y) e& ] \3 @" @) d以上为常用的函数！
; f& Y* u1 o l$ [9 E" W3 t# M3 u还有很多，如有需要我把资料发到你邮箱里 5 U/ L# \( R5 X0 U% E. }) t l
' ?9 G$ c5 w" r: x4 X* f7 c: ]" x" T. u& M/ p
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0 ]. W3 @7 }) H4 @ a
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