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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2 C! ?6 u7 I2 I
if <condition> then7 ~$ ^) h- O( B- _% ]8 {
<statement sequence1>;/ i0 _3 J) O8 K- O) x/ U. u" `, K0 O' R
elseif <condition> then
- m5 d+ l5 V$ X6 V4 D7 Z, {9 P <statement sequence2>;1 b0 z" d6 j L; U& |
else
$ ^% W4 r9 p) o( h: e* c <statement sequence3>;& q# E* l% j4 e+ E, B) x% l
end;' U- q- p1 V7 z8 d+ m
如果分支比较多,用: r9 O% ] h0 h% F$ T
inspect <expression>
& B0 M0 K$ D/ e% G when <constant_list> then
. ~: n+ Z) B! Q: B6 X. W: F <statement sequence1>;
- f# v6 B' b) [# U. [* z; J when <constant_list> then1 X' ~& `2 Y0 W4 G- ~( P' w; H
<statement sequence2>;
8 G5 ~$ X4 n0 T+ H ...
5 Q" t7 r+ d u, {& W else8 \! x- s/ T2 j0 |7 {
<statement sequence3>;( P L4 Y: \0 x; {6 ]) ]
end;
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* J+ | c. j5 V; z. p3 C( e' m) o: b) C2循环语句
+ r- X l3 Q! ~$ z& f- E2 l: t (1) from <statement sequence1>! Y/ ?4 ^ { ] W
until <condition> loop }; p2 W# }4 K3 x' A8 b0 o
<statement sequence2>;0 s1 n7 W1 r+ [( o) w* S( i
end;! z. Q$ V) T& f/ R. z5 d; F9 f
(2) while <condition> loop
& O% J: g0 l& d <statement sequence1>;
4 m4 S" q. I: U7 k end;8 ?) n, k8 [2 f
(3) repeat
5 I# d& P* n" ~( y, X7 g. T0 x) s/ y <statement sequence1>;3 a# t, e2 K' Q# F6 Y- Q6 X
until <condition>;3 W2 B, l% M! q& ^
(4) for <condition> to <condition> loop
% v# c1 g' {7 H9 N* y <statement sequence1>; I3 B2 M- k& b1 w+ `
next;$ D+ h# w, I1 R1 d3 g N6 C+ x0 s
3中断语句
" ~5 F! s6 ^9 J5 P! c" A waituntil <condition> prio <integer expression>;
5 `7 ~5 y% `" @- L/ q
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以上为常用的函数!4 W+ c( \1 Z3 I/ G4 X. {# _% c
还有很多,如有需要我把资料发到你邮箱里
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