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发表于 2012-11-13 08:48:12
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1判断语句% @ V z- m2 ^/ {. k* i, _
if <condition> then) ~2 j' s# P+ O6 h- W
<statement sequence1>;8 M- m/ ]! s, g) ?
elseif <condition> then
5 X, t: A6 l4 e- ?. F <statement sequence2>;
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<statement sequence3>;
4 G' G5 e* N! F1 u2 M& U end;
& D& d' M. q- w2 Z) l; ?如果分支比较多，用：
8 I: W1 b( @ d5 u) k8 v) [+ I inspect <expression>/ f% C7 c3 r8 y g# R5 f/ |
when <constant_list> then
; [% T3 O# ^0 I! D7 s <statement sequence1>;
' C( g3 `' o9 |# w. {+ _ when <constant_list> then" j: x2 G: A' j
<statement sequence2>;
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else
P7 r. z6 i' M* A0 X- R, m S) j <statement sequence3>;
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* ~* n- X4 }- B# u: J2循环语句
0 ]( q4 ~* j. G' \ (1) from <statement sequence1>
$ A6 H" Z* y: q2 M until <condition> loop: N$ ~: Q; `/ b6 A) h
<statement sequence2>;
, w n) F/ n4 o* X [ l/ t# ~ end;
0 }# j3 x E$ ]. g5 R. o/ T6 e (2) while <condition> loop
* M* x% ?- [$ ]1 ^% U <statement sequence1>;
. ^2 A# G- ~7 A' U/ }, I2 j end;
) H' W4 e9 H" j9 n! L# p% m. A (3) repeat $ {7 v! l- J6 P& v& s; ]
<statement sequence1>;% B, P) D, e$ ^) t4 H1 _& V3 ~
until <condition>;
" N- s8 E" O3 G& l (4) for <condition> to <condition> loop
# r; }2 ]( A0 j; o- X <statement sequence1>;: }. A8 ^, Q' [5 E2 J% @
next;
2 U- g0 N+ V6 T5 u0 a. L3中断语句
& ]% d9 w5 Y/ K& e0 _* }" o waituntil <condition> prio <integer expression>;
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: z2 h3 y- D* m; I# y& t以上为常用的函数！% ?- A: O; _: L' b. s! R2 Y
还有很多，如有需要我把资料发到你邮箱里
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