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发表于 2012-11-13 08:48:12
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1判断语句9 _" g% q5 @2 q2 b, w
if <condition> then
# V( a6 n1 r* b- S; N; s, \) L <statement sequence1>;
. o5 @ ]2 ]4 d$ g5 T- n" g& D elseif <condition> then
* }, e# I9 Y- z <statement sequence2>;4 M/ B, f6 z' }3 Q8 L6 w
else
0 R& C1 i% b* k6 v# G3 r& v <statement sequence3>;: z+ t0 I% j5 Z) |+ }( W
end;
+ c! f! ~) j( k# B4 x" k# F4 J如果分支比较多，用：
! I% l2 K* e2 F0 X inspect <expression>. \( n9 p1 w, S# }/ s8 u( z) d% s- K
when <constant_list> then1 e5 I4 a. a/ O% P* Y
<statement sequence1>;) |+ [/ Z, S v) r2 C
when <constant_list> then
, ~& W+ A$ I4 r <statement sequence2>;$ F: T: S: _: C3 W; S# |
.../ E- Z: h( u; ~( Y+ c; M5 p
else4 l( s3 I1 s/ W. ?' U* G- p
<statement sequence3>;+ s8 P; u# C. f
end;4 n- M7 ~/ j! W8 g
4 R3 X1 D" `6 \$ R/ i) I2循环语句
- W5 A% [, L a# O1 f2 h (1) from <statement sequence1>' w+ v4 f0 |. c2 V: @
until <condition> loop0 a+ q" y5 K" c( l; Z# N
<statement sequence2>;1 [) B! {8 s7 e2 _$ j7 i9 ]
end;, p; n X2 j$ s7 e% C4 M
(2) while <condition> loop
; E" d; a) D, J) j+ R" W <statement sequence1>;
/ v& l5 R+ O8 l9 a! l. V end;! L3 h" n* k: U4 Q0 I. T* U
(3) repeat
4 @: f$ ~. J0 f0 s8 P <statement sequence1>;
% [* R0 \) s. A6 o/ T until <condition>;! u6 U5 G: \1 d! b3 g
(4) for <condition> to <condition> loop& k0 i3 l+ _; z& f; J
<statement sequence1>;. R/ p* A* A1 {. w, y1 z/ d
next;
+ ~: r* Q0 m0 @) J3中断语句
4 O. g5 R6 Z2 n* y! p0 }, X waituntil <condition> prio <integer expression>;0 T+ P( X$ [$ f$ g7 q4 A5 z! M/ N
$ _8 S5 f! Q% P( t3 N: B, N) w. J0 E
" L6 R* |; K @0 y k8 _7 F ?以上为常用的函数！
$ ^, g5 ?0 d2 |5 z. Y) q还有很多，如有需要我把资料发到你邮箱里 8 r$ P) e; p% a2 n+ f& @
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