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发表于 2012-11-13 08:48:12
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1判断语句6 w& L% t! |. l1 e( u
if <condition> then3 ]( H& [5 S# X# [% x4 u! D
<statement sequence1>;4 |4 \/ u k: q4 a1 o6 G4 y5 c6 P
elseif <condition> then5 |8 M9 S1 M+ X5 |0 C* T
<statement sequence2>;" Y' y9 ]2 u$ g3 K b- d! p
else
* ^4 E, ?& R6 b <statement sequence3>;
) x7 C' \( B1 C ]" j6 h: H end;
0 M( @& Q) z. D0 K' ]& T. q如果分支比较多，用：
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when <constant_list> then( [# a. z& d. A1 N
<statement sequence1>;
+ d3 w+ Y4 B9 k7 O5 A; I- b& o when <constant_list> then
% F* {! E; _$ p* ~4 ^# b* V <statement sequence2>;4 T0 i4 r+ | c# I" M
...
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<statement sequence3>;1 z- R6 `+ j# C7 ^5 W3 H5 y7 U
end;# \9 q- v3 ^; b/ a
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2循环语句
' c0 M2 j* Q5 f0 K, H* @0 V (1) from <statement sequence1>5 @! z, \% |$ M
until <condition> loop' M7 ~/ K4 {; L& i2 E" s
<statement sequence2>;, G! V$ e$ G7 ]
end;% e; ^7 g1 a% W# Q
(2) while <condition> loop
$ f6 ~6 v6 S& y' H) t: B( ~ <statement sequence1>;& e T4 ?6 U0 q$ [0 o& Z
end;; S1 G: b2 w, S1 f* H4 c$ q! V- p
(3) repeat
# @0 ~' l8 @( F" G <statement sequence1>;
( a) e) l/ ?1 g) `" ^ until <condition>;
8 _: S- t- m: u1 ]1 ^* A8 u% Q (4) for <condition> to <condition> loop
$ Z' _5 b0 ~& r' v8 [7 u6 k <statement sequence1>;' u5 T+ H' O1 z n
next;; j6 D7 s8 u9 C9 ]1 f
3中断语句' E# v% a& ]9 a; L7 H5 v) }8 y, \8 I
waituntil <condition> prio <integer expression>;
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0 _( Z) Z6 P: c. L6 C以上为常用的函数！- d1 z1 d. l$ R! e1 M
还有很多，如有需要我把资料发到你邮箱里
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