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发表于 2012-11-13 08:48:12
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1判断语句2 ]: u% ]7 p. W
if <condition> then
3 X/ L! T! V2 V+ `# e <statement sequence1>;
6 j1 u2 D# U/ p$ T elseif <condition> then/ e' n3 c( r% j0 \% a3 K
<statement sequence2>;
! P' ?9 S% w4 S, w( L- a1 ?+ N6 K else
9 }$ U% b) L- Z4 O <statement sequence3>;
$ C! Q4 {: w& e5 o# L end;* B Y" O4 d+ v# U/ J, h
如果分支比较多，用：
/ M1 V) ]+ S8 l# U9 p2 X5 ^9 O inspect <expression>7 W' K; G9 U; l& B: Z5 Q
when <constant_list> then! j! ] ]5 }8 ?& x0 G
<statement sequence1>;
* ]' B. D% o& B2 ]5 e) n& T+ G) ` when <constant_list> then
D9 Y! M: |7 c. e! ^ <statement sequence2>;
+ ]5 c& G8 N3 L% {! ] ...
1 o) Z3 r5 V. \& t4 {" B else
+ w0 P2 |3 B2 R* F <statement sequence3>;2 |" z ?$ U M3 y e* I
end;
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# O' V( J$ Q# @: P2循环语句/ E% W- w p4 T" | o. K. V* @
(1) from <statement sequence1>$ r& E! O$ K: H5 F p
until <condition> loop% f+ ]" t" G1 `- N
<statement sequence2>;1 ]3 _7 P2 H: U( g4 P( M) W
end;
2 B$ S' Y5 B+ W5 l4 e0 ] (2) while <condition> loop4 b4 {, G; G$ Q4 |, n
<statement sequence1>;; o- k, h$ w/ }+ Q; I+ b/ P! ~# s
end;$ e& M3 X. R! C' [
(3) repeat 1 b: T3 B* N8 c
<statement sequence1>;
) J0 q7 i3 o0 ^, C: T until <condition>;
. c. m! y' X2 q. p( p1 r0 N (4) for <condition> to <condition> loop) w0 A) r: u* K, U c
<statement sequence1>;# x& _7 Q1 z7 i/ K$ D7 D1 k
next;) Q! o0 W& E' K
3中断语句
! R0 D. o: D1 x# G8 g waituntil <condition> prio <integer expression>;. m! b3 Z" u7 V5 H4 t
% } r* S* H; w5 X& h% X2 ]$ g3 K3 P' I0 d, {- {: z4 D. b* {2 K* X: D$ u
以上为常用的函数！4 o/ g; Y2 `2 y: m% o0 w6 j3 I2 t
还有很多，如有需要我把资料发到你邮箱里 # Z) q; l2 k" j& g5 s, g4 P7 A
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