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发表于 2012-11-13 08:48:12
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1判断语句
- Q; {/ d. q# J! g2 l if <condition> then' D8 B* k9 |, i$ ?) ?
<statement sequence1>;
6 l/ h0 R$ o6 X5 I3 s! f+ ] elseif <condition> then3 h' m, D( A+ r4 u6 Y
<statement sequence2>;0 A7 X/ r9 f& ~" o6 \1 Y
else
6 X4 E& ~# [5 g' K h <statement sequence3>;
5 a3 b# r7 P; k) J3 T end;
4 I$ K; V+ [0 A, M, m* _1 R如果分支比较多，用：
: e3 `' a+ Z1 G; o; t# B' E inspect <expression>, @) C+ E7 D. w$ _5 W9 S
when <constant_list> then- L' j7 g Y+ m
<statement sequence1>;8 Q" r* A' v" Y' V" @3 T1 v% t: e3 j
when <constant_list> then
9 l1 y3 y# v( z" Z <statement sequence2>;8 e" ~& [2 ?# W) E
...# }* A( q" f. i4 F0 j
else; M% M+ p& X2 }9 j& s/ q( L* y
<statement sequence3>;
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/ ~/ q K! l! _7 G2循环语句
) z4 Y8 e. X2 `7 G: O (1) from <statement sequence1>; [5 b: n; ]$ O& k" W+ a
until <condition> loop
( t) b; A7 {7 V <statement sequence2>;6 @+ ^) C1 ?6 t7 Q' G9 P" T# q( `
end;
7 P6 L3 y' X* s9 c1 k. j7 T. Z (2) while <condition> loop
- |& V# C- l" b <statement sequence1>;
2 c) ?3 q3 a6 }; U n! ~1 m end;" {+ Y$ T8 G# x
(3) repeat ' v- g" N6 I0 ?* S
<statement sequence1>;
& f2 A C6 X: D* c( r until <condition>; c: S( k8 l% G
(4) for <condition> to <condition> loop. h# E9 y- |: ]% ^$ X3 ~8 C
<statement sequence1>;
" N' F4 ?- a# _& J4 U0 K; @1 r next;
6 `- W' x0 X/ S9 o, @+ F5 _3中断语句
1 F7 f6 T' c- f# g% U waituntil <condition> prio <integer expression>;
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, m1 e2 b0 h- U, G2 L) L- n1 a7 m7 b: t以上为常用的函数！
. N' [; ?- p a/ b还有很多，如有需要我把资料发到你邮箱里 7 y M+ {, o* c' ?8 Q
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