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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
5 f ? I% l5 }5 o+ x if <condition> then" q0 t3 a$ p& }# y$ I, v" V- `! C
<statement sequence1>;0 e: K& b6 d7 i" s/ e8 T; R$ g# w
elseif <condition> then& q9 W3 Y" [& k& R1 q8 [
<statement sequence2>;
9 S- Q9 A. u) x! N7 {# M! Q7 R else
6 X: W$ i" k3 b& J& i <statement sequence3>;
' U: D$ W. z& P$ y, h+ f end;# h% b$ O! R" P: b
如果分支比较多,用:
- U1 K+ h3 ?5 ^, J2 W: S inspect <expression>
! O; v) o i& Y3 R; P. P6 T when <constant_list> then
/ X% ?, e' h5 M, a* R) S <statement sequence1>;7 ?- l9 A& [9 x8 ^! V% S9 A
when <constant_list> then. x, M/ F0 V+ y0 k8 G
<statement sequence2>;
) Z8 R8 D7 R; P. O2 {7 o) ~1 k ...
5 M+ ?2 ^7 j- O- G Z6 x else
4 e& k3 W* o/ p <statement sequence3>;
: D' V8 n8 N; C! x# d: Dend;
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/ d8 H o. }/ i; `4 H7 u2循环语句
1 a, C P0 w5 ?6 v* j- l" t (1) from <statement sequence1>
& s# x m3 T3 f0 a: W' X* O until <condition> loop. q3 G- s& y' N! f+ c
<statement sequence2>;
; x# ?& h0 i, q$ T" o end;# a0 Z7 }9 W2 e, V
(2) while <condition> loop* z5 R1 A( a8 B- N, L
<statement sequence1>;
9 l6 B- c6 S0 o' q; |! E& V end;
P; B% \& r/ t$ q+ P (3) repeat * y# F8 ?( X9 Z- u; p
<statement sequence1>;6 E1 ^- V6 [& m0 j! }
until <condition>;
5 T, M5 `8 m. _& H- `9 i- y8 W! l" T (4) for <condition> to <condition> loop
6 P" m; a( q. J2 B0 ~* r <statement sequence1>;
* [+ x; S6 s" x' v8 C next;6 e8 E) i* ~9 N5 L
3中断语句
* z2 |& p. ]* S& u$ Q waituntil <condition> prio <integer expression>;
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2 i7 m8 d8 z, W以上为常用的函数!8 m* H* i7 I6 i& B, b' V
还有很多,如有需要我把资料发到你邮箱里
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