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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/ |9 v2 G1 G: i8 o
if <condition> then; [2 P7 X: x6 Y6 F+ H
<statement sequence1>;
1 ?1 V/ P% h% l& ^& Y" F# v& e elseif <condition> then# \& H: X9 H/ G9 G. {
<statement sequence2>;
5 l# ]* Y7 ~) Z y E else # [8 W) B0 O& g6 Y1 q% t6 J
<statement sequence3>;- O" H% t4 @, r! l6 @0 D
end;& N' E& }$ z; ~) v9 D
如果分支比较多,用:6 Y* S5 U+ p- r( I# }
inspect <expression>. q& N6 \: X) E# f* s; }2 ]
when <constant_list> then8 u; W8 G% M7 J4 t( `/ [; I; V
<statement sequence1>;# }( p3 V: H2 T+ E
when <constant_list> then
/ U# S4 K( ^/ R0 c <statement sequence2>;1 m1 n2 Z( ^7 u( l- H
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else" `' v d+ U/ o& g
<statement sequence3>;
& W0 p# K3 z+ Y5 k( X3 Y; } t+ ~: z8 Jend;- O, U9 C9 L v, M" n" q# Y2 Q% ~
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2循环语句
- _3 r; e/ D7 r (1) from <statement sequence1>
! @" T* X8 s8 g) R% w: r; d until <condition> loop& T& A( f# p2 d6 {
<statement sequence2>;$ t2 z& ]2 G) Z9 [; N7 o0 t7 E; F0 o& U8 ?
end;2 s4 F2 ~- W- |; E4 B* @
(2) while <condition> loop
9 d W* P* S. U- W* a8 Z# Y) \ <statement sequence1>;: w- K! d; L# _( K2 Q: n8 A
end;
+ d+ y( k! u. d" G# f1 T (3) repeat 1 r" x: ?) O% S. l d5 G5 a) l
<statement sequence1>;
: P8 @ Y6 ?% J4 x/ ` until <condition>;
0 g8 l1 z1 q( I' i& a (4) for <condition> to <condition> loop
; ?3 h O$ Y+ W5 ]* p8 Q- q6 J <statement sequence1>;
0 d$ j n# T' m4 w. c' P4 P v- J' n next;3 O' u6 J4 u5 e8 W9 {
3中断语句2 Z- n# V% o* F7 x9 X
waituntil <condition> prio <integer expression>;
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5 I/ y# f, K% l! G! n9 w: r7 r- O以上为常用的函数!1 l! J' q7 T! I6 ^* {2 p
还有很多,如有需要我把资料发到你邮箱里 5 Q( C% L( I+ D4 t' P4 T3 |: ~
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