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发表于 2012-11-13 08:48:12
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1判断语句
w) i: Y4 B/ Y) R+ i if <condition> then( B% m5 C, r, m7 C
<statement sequence1>;3 p$ q) m4 C9 o. ?5 B- p- i
elseif <condition> then
/ j# E" v+ \, O. K$ M) T$ m <statement sequence2>;
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<statement sequence3>;
7 ]; |( y1 I" e; ~* [2 P end;
) `( Z, {) u% R: a2 X: }- X如果分支比较多,用:
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when <constant_list> then8 B$ S/ }1 G" C/ R8 V7 h( e
<statement sequence1>;
0 m( U6 f+ p' E+ y. p when <constant_list> then
: x7 y" O! ] d& a <statement sequence2>;
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<statement sequence3>;
+ d& I& \% k' d) }: ]end;
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& w% V! E: D. c. p) Z# v2循环语句- P$ }; O% |- y( p9 ?
(1) from <statement sequence1>
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<statement sequence2>;
H; O# }" t/ j# e% H& g end;
/ b8 P. j0 u5 [ (2) while <condition> loop
' _( `1 ]: ?2 y! l5 O <statement sequence1>;' I( I! z& N( k6 {; q. N0 R
end;/ T" |4 C% A" H! P8 R
(3) repeat - ^9 J0 ]+ ?/ T( s8 \: S9 s
<statement sequence1>;# T" E- r+ H" I7 B2 z/ Y
until <condition>;
4 W- G; ?; Y( ~8 @- \ (4) for <condition> to <condition> loop
+ z" L: D* Y9 b2 x4 A <statement sequence1>;
1 G4 ?# B8 A1 Y. f# d next;
: w! x8 d7 ~1 r4 t( L6 X) k3中断语句( J! b( s" N) |0 r
waituntil <condition> prio <integer expression>;
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; M" I$ U& {; E4 g以上为常用的函数!9 G! @ X3 b5 t t7 D( J
还有很多,如有需要我把资料发到你邮箱里 K$ e4 |* \" Z0 z4 z" y8 v% ]
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