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发表于 2012-11-13 08:48:12
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1判断语句! n3 B- O2 r4 a' z3 X& `* n8 h
if <condition> then
9 _' ~6 x9 s% u3 F } y4 | <statement sequence1>;
7 w" W m1 w9 H U: C( T% Y" c elseif <condition> then
* F# H- _. t" r7 f% v <statement sequence2>;
7 p+ n- m: V1 _" ^ else
4 J) [$ Q- w' c$ q/ I0 S0 w1 d <statement sequence3>;8 q6 @' R6 D" [$ r: l
end;4 ?3 }4 E% L# Z- ]! r c8 W" g; G
如果分支比较多,用:1 A% {0 B3 X z- W* }* ^
inspect <expression>
6 K- l8 p$ z' m( p when <constant_list> then
( I* d$ I M( E0 e* M <statement sequence1>;& W+ Q+ t. Z, A# {" e
when <constant_list> then" w$ J" Z7 _, O8 x* h6 k7 H0 }8 g
<statement sequence2>;
3 y+ n$ r$ e$ J ...
+ ]+ Q& [" j# P$ ]% i3 @& \3 P/ S else
; [# V- u" u& Z <statement sequence3>;# O0 R( M# \- K$ P0 u" v) X
end;
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8 ] F& N5 Z6 Z+ \1 f2循环语句
) K! @8 _4 V1 V, L5 O (1) from <statement sequence1># N- C( y8 `- J0 I, a
until <condition> loop
7 z% e, s! z" k# _ E+ S5 m <statement sequence2>;) @( ]$ z/ f; T0 }4 H% v
end; |( r+ Q" @8 m( n P( j
(2) while <condition> loop% \) A3 m5 O5 t! w0 D- `; s; A
<statement sequence1>;
% q& u9 x' H7 S Q end;& y( q1 Q+ f8 B$ Q* x5 s$ i! t
(3) repeat
* ], S4 Y2 D b) t# i- h' u* a' c. d <statement sequence1>;
; b3 I+ r0 }. ~2 Q until <condition>;% D; E3 o, S. u
(4) for <condition> to <condition> loop5 D( N9 z7 g( G9 ^+ H- z) \- k( P, f
<statement sequence1>;, D1 S2 q, ~# o" [4 W2 \9 p. V
next;
( g0 R9 V: Q: |3中断语句1 p; w( s' d) c0 B$ B) }; J
waituntil <condition> prio <integer expression>;
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以上为常用的函数! U: l7 |/ @! d6 s# E
还有很多,如有需要我把资料发到你邮箱里 0 L+ g+ D; m c, r
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