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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句! W% H9 R, \2 l9 ?' N9 ?0 G" ~
if <condition> then" Y# p' i( ~( v* g, z$ d. X* p. E
<statement sequence1>;
8 r, q8 H6 g+ B% _- x) X* s1 v elseif <condition> then
- t' T& J& X7 N1 n2 k <statement sequence2>;& o0 F. { Z* o6 b, s; \3 ?$ b
else 6 ]& E/ j9 f7 N# { ~0 ? K3 a
<statement sequence3>;
# S: ^; Z6 T/ q; ?. Q end;
2 Q$ a# W. F9 [! k1 i( X如果分支比较多,用:/ G6 e1 e6 \# l l6 J9 |
inspect <expression>
* q% y; h8 U/ a. }5 Q# ]& m$ M when <constant_list> then
2 U' a* z3 P; S <statement sequence1>;
; }7 K5 c' z4 u9 ~: l; v4 t. r when <constant_list> then- H6 y* z# ?8 V
<statement sequence2>;
! ]0 ^: c* p, [- \0 i ...2 s( c# N3 P' C9 c- |7 X& O9 M
else- b$ Z" y4 ~- x; E' L& l! C, Q2 l5 E
<statement sequence3>;
9 }# P" A9 j1 l2 }! C3 Uend;
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6 f$ ]7 k6 f8 F0 @, B) A6 e2循环语句
: B5 I( x5 h5 ?9 q2 O. n3 i: v7 n (1) from <statement sequence1>
" F# C+ R4 B' g, Q until <condition> loop1 a5 s; |) ]) g2 l5 N" B) U
<statement sequence2>;' i9 l. I1 x- Q2 i) a$ m
end;
$ Q% Q+ @ _7 K, D2 ^ (2) while <condition> loop
1 U- v6 h$ t2 K. Q: ]/ K3 h+ c <statement sequence1>;* m1 R/ H" t) u
end;& p; ?2 ~. W# {7 I M% h
(3) repeat
' c* X# x6 d! |( V) Z <statement sequence1>;$ j' \' l: e) x6 T' a- a
until <condition>;$ K) ^% i. ^- ^ y y! d
(4) for <condition> to <condition> loop
/ E# j8 D- o0 i/ ~: n <statement sequence1>;
6 K/ T* z. W' t& P8 b% `! a3 Z next;
5 m9 ^% \6 u- ]6 l, X' ~( Y3中断语句
! p+ b* Z m5 j$ g; H+ Q waituntil <condition> prio <integer expression>;
+ u( o0 [$ D' v9 j* g; Z5 J: A5 M/ w( b2 {: y0 P& W; z
6 z7 Y8 j2 B2 Q9 B
以上为常用的函数!
$ A* |- o6 [2 l! T# G0 U4 ?还有很多,如有需要我把资料发到你邮箱里
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