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发表于 2012-11-13 08:48:12
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1判断语句
7 D- T5 s! E& j) `9 q if <condition> then0 d% x- B4 ^1 S
<statement sequence1>;
# O+ Y1 U8 Q; m# ?% E6 n elseif <condition> then
4 Q# M$ v- ?! d9 B <statement sequence2>;
0 |+ D- v" v/ ^* T2 d+ F else
, J. F- G* _9 G4 X, ^ <statement sequence3>;3 W9 p2 M' u! N6 I5 `( x: m
end;
% _1 h4 X' [$ i3 \/ N; x4 S如果分支比较多，用：
; U, M5 O0 k5 \. w+ X% { inspect <expression>
, O3 ?# M9 ?0 s& K- N2 L% W& j6 q when <constant_list> then
" {( y/ j C3 q2 b7 M. B, u <statement sequence1>;
$ O( \( A( l! v/ G* I when <constant_list> then T, i# F. ?( O: m3 ?! |7 I
<statement sequence2>;2 ]& ?5 p% O* m
...
; } C! P; x, q else. ^* o8 }+ Z% S- o2 P+ r
<statement sequence3>;
+ \# x O4 ^! f. {6 c/ Oend;; ?8 ]0 f# n: F% C0 }
9 c2 N( e5 _- r4 E2循环语句; @. O6 I/ O" {, A! L$ H k0 q
(1) from <statement sequence1>8 N8 o( {1 A: U y2 G0 N0 J q7 M
until <condition> loop
' h2 K( ^" S5 l, {6 j" i4 @ <statement sequence2>;# j* f+ X4 `' R/ d6 Q
end;
7 N. }6 T. O6 g! M; l7 T (2) while <condition> loop( U0 R" ^- D# ?/ p0 S+ U, u- C
<statement sequence1>;- K$ I7 _2 V- I8 ?- J0 ? E( I# V
end;5 m; ~* B' d0 w8 {6 D1 K+ `3 q' Z" d
(3) repeat
, X+ c! \* D3 O' B$ ~# E <statement sequence1>;
/ R' e# w( k! G- y- ]7 [ until <condition>;! S c' k. `3 \* o1 X$ n' d: @( R
(4) for <condition> to <condition> loop6 X; b) W6 r) e# @( W; k: y* b
<statement sequence1>;
; S; a8 x$ P/ S1 y1 i6 A/ j next;# F6 t. | A5 A" U* ~$ U
3中断语句3 x: Y2 e# h$ U
waituntil <condition> prio <integer expression>;
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以上为常用的函数！
. ~: B/ G% B' ^# E. O还有很多，如有需要我把资料发到你邮箱里 & X' g6 ^- A* A- h' ]. C9 f( m
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