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发表于 2012-11-13 08:48:12
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1判断语句9 ~9 A# s7 o i2 g/ C* B: E6 H
if <condition> then
' E) j" f/ `4 y& h O <statement sequence1>;
! M6 w. Z6 x! O; P8 B3 x$ N* f$ r! v elseif <condition> then
" C3 i( ~2 J% Q) M/ f$ o <statement sequence2>;+ k' v9 t5 d0 V+ g ~ i
else ) r. a" h* P. F: g7 ~$ f& z: e# h' g4 h
<statement sequence3>;7 I) u$ g% P: y/ a
end;
/ D% T( h2 r) p如果分支比较多，用：
" s# j- l0 Q6 {9 Q- @- Y1 R4 g6 Z/ m inspect <expression>& s5 c0 T! Z' P+ N( ~9 {5 x6 }
when <constant_list> then) O4 P O9 m: n" G8 ~6 Y; S1 }
<statement sequence1>;( G& ]( H# v7 C }# P
when <constant_list> then
, [- C1 ~- z/ v) f <statement sequence2>;1 O5 ]7 V3 {+ @. N7 e: n( [
...1 f1 P0 O7 [8 U& X7 s+ n: u
else
+ P, G! E. q- x( b1 b' n <statement sequence3>;
1 H& }$ G5 E: f; |end;
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2循环语句: u9 `0 G. P' y9 e& Z
(1) from <statement sequence1>
2 p) q. s& u! m6 \+ O until <condition> loop9 \) K# {- K4 D; }' C
<statement sequence2>;7 I* b) v. C) S: B7 v& b0 L/ i0 c
end;1 t+ r( h0 s- G
(2) while <condition> loop
" k6 x, W% J5 q7 {: ^) V% ^3 s <statement sequence1>;
" Q+ Q7 U# d: w- a" r2 @: `, H. ? end;( g$ H" d# g! \+ H& t. Y
(3) repeat % i& I. Q5 E3 U8 E- Z8 m' Z ~
<statement sequence1>;
( y) Y3 x0 {6 k0 Q! \" m until <condition>;& O, l! \, p' M7 I$ q* \5 s! V% S
(4) for <condition> to <condition> loop, { [6 F9 n# F8 D' e9 ?# d' y
<statement sequence1>;- H, c- m- I3 b9 T
next;$ ~# j9 N4 j) q; G- q
3中断语句
' x1 _3 h/ Z- a* Q3 N' B" i waituntil <condition> prio <integer expression>;- i/ X# q( b. B
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以上为常用的函数！: J: z% ~, N7 J2 l) h+ \' z
还有很多，如有需要我把资料发到你邮箱里 9 A7 _# Q& s% a# E7 s! {3 l% t
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