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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句8 E) H1 s5 k, }3 U
if <condition> then
7 R/ l& y2 N9 P; A <statement sequence1>;
0 i& V ?7 x" u elseif <condition> then8 L' ^9 Q1 }5 c/ Z/ h% @) e I- z
<statement sequence2>;1 z/ ]: M9 V* v' L% _
else
' U, X2 m% Q3 t <statement sequence3>;
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如果分支比较多，用：) E& b8 {0 {9 e3 A* \
inspect <expression> Z! B. V+ L+ `" Y* v) @( D$ p5 |
when <constant_list> then% K, Q* Y; \& _' a6 e5 U% m
<statement sequence1>;( o! g/ X- o3 {9 E W
when <constant_list> then
/ x- L' f# Y0 F* y& j4 J5 N* l# D& ^; v <statement sequence2>;
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else6 T, i; J+ x3 R# D5 B2 P9 D* C
<statement sequence3>;- i& b$ m7 p# N2 J9 b
end;
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2循环语句7 {1 W# j; P# y, x1 U: n* W
(1) from <statement sequence1># v: m& ^' B/ V/ @4 M4 ?/ a) V
until <condition> loop
) ]6 |$ g: N: m# b8 t <statement sequence2>;. H- _( D- b7 _5 ?! d0 q" Q
end;) i/ `3 p) g7 |2 _2 ~ G- a$ [* ?
(2) while <condition> loop
n7 g4 N3 H+ }! m/ T' s- A3 u <statement sequence1>;
' [% w& j) M+ x6 x) v( O: _4 l- e8 q end;
7 b7 U1 A, n* J4 a; E9 f/ d (3) repeat
9 j! Q4 f0 W3 a* G1 I0 z1 P <statement sequence1>;+ Z% S0 E/ X5 G6 q4 i, N+ R+ @& u* h
until <condition>;* e/ q% u8 A$ ~& ?% c5 f/ L, q: K
(4) for <condition> to <condition> loop, U9 {9 L- u% s4 b& J4 c; }( y6 M
<statement sequence1>;# ^& V4 U i" Z* C% n; |$ F
next;8 n: j% E7 C( m
3中断语句
3 m& G9 K; p6 `- k) B+ u waituntil <condition> prio <integer expression>;: j6 R# l+ @- G2 E
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/ w" ]2 H) |1 d8 R1 P以上为常用的函数！) k/ K5 m& D; L+ u& j6 i4 [( G
还有很多，如有需要我把资料发到你邮箱里 & v/ \+ C, {; _1 g7 O e8 @1 X
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