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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
% D" G; F' {: B' i if <condition> then
4 X1 B/ G+ u. P7 U( v$ }7 ?7 I+ y <statement sequence1>;/ q- X& r! [ a' |
elseif <condition> then
3 ^" }4 b' L& _ <statement sequence2>;
% A* n* h5 b" C( T4 [+ E else ' q8 N: F' f0 `/ ~
<statement sequence3>;
7 ~8 X4 {# ?( q8 H- Y- r end;
5 _5 S+ v. @2 x1 O如果分支比较多,用:
/ T$ H! t: K/ H' p inspect <expression>: B, q) i# l) d' r: R
when <constant_list> then
! m3 k* ?6 m% q$ E @ <statement sequence1>;; \% H% @& q% x( \$ a. b
when <constant_list> then
9 Z/ p7 L; f- T9 ]/ K+ P8 J <statement sequence2>;+ C2 a: a8 ]8 P: z( E4 _- w. X
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else" n/ O6 ^- l' p, X) Z5 _4 R, z" T
<statement sequence3>;5 N r: N0 c& @$ H M+ h
end;- W6 Y/ y* t3 W
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2循环语句
( s( n: ~ v3 K% f4 g (1) from <statement sequence1>4 E& i% T( i+ {+ I% { L' |
until <condition> loop
; A' q* N, R$ g0 [' F* F$ N <statement sequence2>;
& A' t+ ?+ Q5 O1 S1 F) ~$ c' n end;
7 k/ h2 d6 M2 O) e4 i! b (2) while <condition> loop
% V4 Q9 l3 R- q5 J <statement sequence1>;
( e* t; X) ]& T end;
$ J& v+ d& C/ p (3) repeat 9 ?* X( O: M r, ^( l
<statement sequence1>;
! h4 R6 A; M ?6 N$ y3 Q7 A/ b9 n1 I until <condition>;
! x! _% r0 |( ?+ t1 I2 S0 [ X (4) for <condition> to <condition> loop7 X7 v7 w6 Z: ]! _: |% H
<statement sequence1>;
x% ^. |6 p) l6 R/ v( z next;& H% \- X8 F+ R$ L4 t' Z2 o
3中断语句
$ D% n' d" E: e* z' W5 o z, L$ @ waituntil <condition> prio <integer expression>;( G. G% s* Z* Z# b6 z2 B3 L
+ v! b3 w0 b. N p S+ I- O
1 {; ]9 ^4 c! f) S以上为常用的函数!( ?0 F, O, d9 |; F
还有很多,如有需要我把资料发到你邮箱里 + i& ]8 I& L+ J9 ~1 I
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