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发表于 2012-11-13 08:48:12
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1判断语句
8 Z* r5 T J. r5 o0 K if <condition> then4 k) W- Q" |7 r
<statement sequence1>;1 Y) u' p1 Z0 A9 x
elseif <condition> then+ U' ~% M! f0 e0 @8 m7 h" m
<statement sequence2>;7 e" k6 S& }0 d! H3 _- Q( y7 _* o
else
, n" S% S5 D- b: r7 {% q+ F <statement sequence3>;! L" V. x( U9 ]7 i
end;
0 R0 H6 p3 o$ s) Y1 }) u! U4 ~如果分支比较多,用:
6 K3 ~0 W) V/ f* p, G4 s, A inspect <expression>. T' l) o6 z9 z: l2 V# \& N3 ]
when <constant_list> then5 Z2 r2 N0 w# G# F
<statement sequence1>;
g9 }3 t) ^* G; W. {1 _ when <constant_list> then4 f1 d6 v3 k* C
<statement sequence2>;: X c5 A; W/ q6 ~
...
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<statement sequence3>;
$ ^* L {9 S, S6 m4 dend;
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# T0 h' K, U* {6 {# v, E6 w" G2循环语句
) I; u3 c4 _& f( l! ^ (1) from <statement sequence1>
: `% k" L0 U$ G4 `6 l/ N until <condition> loop8 a+ d+ o o5 r+ e% J
<statement sequence2>;. o* \4 g* ?8 t; N# F, b
end;
( L/ \; k. M6 M" u2 j3 G" ` (2) while <condition> loop
6 O$ r6 i/ s7 H9 o* ?# L <statement sequence1>;
2 ^" K+ }% P$ y0 P3 z2 L end;
9 m3 n% W1 u$ k! {* N (3) repeat
( Y \3 v( k, i# }3 ?$ G <statement sequence1>;% O" V; {5 [- b& m0 f8 Z
until <condition>;
$ d8 s* r/ D" u5 x" H1 X; O! x (4) for <condition> to <condition> loop
7 J ?4 l3 W1 @' n/ P$ }) d) n <statement sequence1>;1 {9 o( i& T. z% ?
next;
a; p$ t4 _7 D) m) f3中断语句# J: d3 _% U# K6 a( f4 M
waituntil <condition> prio <integer expression>;
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" ~& F0 i3 Y8 @7 S8 V5 J) c以上为常用的函数!
" ]4 k9 ]" `* c+ Y* d: |还有很多,如有需要我把资料发到你邮箱里 - B( y( }6 d- w7 C* l
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