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发表于 2012-11-13 08:48:12
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1判断语句0 M6 n: l6 p0 Q# ]
if <condition> then
( a( J$ D. u, J8 R; w; C, _/ U8 M <statement sequence1>;
- p5 v4 w" _. G; _; M elseif <condition> then. ^$ P! W/ g1 S
<statement sequence2>;* B* a, ~4 K! o% Q9 H* ^
else 7 ^" _+ ~( s' J
<statement sequence3>;
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如果分支比较多，用：
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when <constant_list> then- V: \6 u0 Z7 ?. e. C* Z% B( e6 o
<statement sequence1>;
4 A& ^6 L' d6 s! }) x5 f when <constant_list> then7 h* {6 x. X" R7 S: }; r7 e
<statement sequence2>;
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else& j6 j& S- \6 N9 ^' L$ m
<statement sequence3>;
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( X4 O9 g- `2 v2循环语句
& m$ a- P @' H. i (1) from <statement sequence1>3 {8 Z& G# {; \6 c e
until <condition> loop
% Q. v+ x9 T7 W7 r9 g$ ? <statement sequence2>;7 h6 m0 r2 R0 @$ O4 S
end;; P$ ]* S2 `# ]+ L- A' y+ Y
(2) while <condition> loop' j% Z( }2 j# a+ o3 l0 r( `
<statement sequence1>;
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(3) repeat * s' p2 u* l! e. O4 q' x
<statement sequence1>;6 ]0 E. |& n6 R9 f8 d: F9 r$ U
until <condition>;
% n" h& n9 V% v P. I (4) for <condition> to <condition> loop
3 T% S, J( F+ a1 E9 X* c9 V2 e <statement sequence1>;& M9 K, K& g8 _; x5 O
next;
! t/ ]+ t: U4 e: S2 L3中断语句
, ^0 r9 h9 K- r5 O waituntil <condition> prio <integer expression>;# w# ^* R) U# W- [6 q
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以上为常用的函数！5 `3 s, p4 b4 D
还有很多，如有需要我把资料发到你邮箱里
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