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发表于 2012-11-13 08:48:12
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1判断语句8 _# }! L# g7 e" B, v" }( r5 W& Q# s, V
if <condition> then
& s9 T& b5 f4 p* m7 Q4 S" r2 E <statement sequence1>;
- E' n% `/ Y' f elseif <condition> then
' C, C$ q# |% Z" q' i <statement sequence2>;
v9 w- a8 ~8 m, J/ f0 X) \. ` else
- L# V& M6 R# {, r <statement sequence3>;
1 M/ n) R9 R& ?- y$ p9 Q ?7 s8 J end;
- A% q9 f$ y* n1 u+ `6 T t如果分支比较多，用：
- [( f7 n1 d5 d inspect <expression>" R' ?" P2 A2 T3 g/ p8 c( X
when <constant_list> then
3 }% O* \" u2 F; [. J <statement sequence1>;
) N8 W' |6 ~0 t% t I6 ^ when <constant_list> then
/ U1 L* G: X |8 m9 ], L w( l <statement sequence2>; }4 l3 |0 s' c* V' V
...
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<statement sequence3>;0 N( {, v- T" w
end;5 ?! H9 b# A( l( a3 I1 y. y2 e
8 R' [7 E( M$ h, f9 h3 i/ U2循环语句
_/ E* O2 x, @7 u (1) from <statement sequence1>
! |5 f( ]: L- A3 z/ V until <condition> loop+ j( ?3 s+ R( i& I* l5 X* O
<statement sequence2>;
2 E4 \, p( D: L, S o. ?0 E8 y end;
) c! r6 U2 Z( G2 _* l7 p. {# U (2) while <condition> loop% t- H9 z `. L8 U
<statement sequence1>;) h5 r0 [1 v" c+ |. Y* ]
end;
! s0 B1 J7 ^* Y5 I' [ (3) repeat 3 ]& {; d& X6 j3 ^. ^
<statement sequence1>;7 y% R% Z/ z0 V: l
until <condition>;8 ~$ M3 Q9 D# x* ]' H1 I0 X! |
(4) for <condition> to <condition> loop
: e6 {" C' j. I z: p3 m# Q <statement sequence1>; P) C4 d' G/ Y4 m! `
next; P5 N3 \5 Z6 J7 @/ r
3中断语句
( W6 m5 N* M( H waituntil <condition> prio <integer expression>;
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9 j# G0 r7 w7 `) P% f! B: Q# ?* l以上为常用的函数！
" {, A+ x4 y+ x/ d* N4 `还有很多，如有需要我把资料发到你邮箱里 / J) `; h! n( n5 S2 [( s
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