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发表于 2012-11-13 08:48:12
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1判断语句: y5 [6 g& w' l E ]+ n- ?
if <condition> then9 h" a. R9 j) S! Q
<statement sequence1>;( K& M$ x9 f- n
elseif <condition> then7 K" l0 `4 C2 e8 m; {. V
<statement sequence2>;
" C2 D$ i, }9 ? else
2 m2 r" h6 _7 @$ `& t& k <statement sequence3>;, ]6 {8 N8 @8 R/ D
end;6 g) G( v4 `2 d( k0 h7 Q/ D6 l
如果分支比较多,用:! x9 f$ b. |7 S0 X
inspect <expression>: \, ~7 O9 y ^8 q3 j" Q: r) |, Y
when <constant_list> then
( F% J% j8 M2 k; m: ]. F <statement sequence1>;
0 Y( Q4 e' [$ T2 Z when <constant_list> then) e. u2 x( P8 y
<statement sequence2>;; g: \3 n% `" o8 ]0 R
...
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<statement sequence3>;" ]% f8 u+ E- t0 X7 |
end;
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2循环语句# B. l! v# }+ e
(1) from <statement sequence1>
! c! O8 ^6 C2 P) r* l until <condition> loop
) z. g" e5 |1 Q) F/ u8 e <statement sequence2>;
5 q" T' M) w( M: h v end; @6 A0 B2 k7 U- o2 l
(2) while <condition> loop
6 u, U" ?4 c" [8 Z <statement sequence1>;
; F, f' t2 g+ m: X end;
2 _9 E( s" G0 B( o. f: [; M3 ? (3) repeat
! m8 w8 A, n1 I6 a) C7 y <statement sequence1>;
6 A( A1 l2 u7 G% } until <condition>;6 B) t6 ?4 a8 ?' }, L
(4) for <condition> to <condition> loop% F3 h4 j3 Q7 Q$ q' u: d
<statement sequence1>;& ~8 i4 H e; D+ {& z! B
next;
7 ], n9 q5 g1 h! `3中断语句
& j, H Y6 ]: t# m% x waituntil <condition> prio <integer expression>;
# {0 \" I {; A- w
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以上为常用的函数!8 X9 u$ r5 h0 i$ s/ ~7 {1 v Z
还有很多,如有需要我把资料发到你邮箱里 5 s+ J# V8 F8 ?! R! G! T7 K
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