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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
% J% T' V1 }, k: t5 E( R. C if <condition> then" N: a0 ^$ p. ^4 f& Q! z; D8 f
<statement sequence1>;
8 C8 }- Y9 \, K* M elseif <condition> then
' t1 x$ {/ s. B& t ^# u <statement sequence2>;& f+ s3 X( B5 u2 e' r; y8 p( R4 e8 s' y
else - a) p6 [2 X! a7 _' M
<statement sequence3>;
- j5 n4 k6 o" n end;
1 C4 D" m( Y3 X8 J如果分支比较多,用:
+ d7 s6 X/ D' p# x' ]) \, I9 [ inspect <expression>
; S {2 p* O" M; t! k& Z4 _ when <constant_list> then
! o* T7 X, d/ |! T" `2 h r* s <statement sequence1>;
- T" ]$ A7 M# s8 ~- t- u: T when <constant_list> then) a" D+ z( y5 ?1 n
<statement sequence2>;) N) {. \) g; G3 a9 U6 Z
...4 a5 i' |8 N; s$ u/ P
else
! {+ l* Q3 n M' S: _2 ^ <statement sequence3>;8 B/ T& K1 }, r, _' [
end;5 u" ^7 z2 X' [/ m# G
! j2 d+ x8 ]$ W1 `8 ^ J2循环语句& B3 v* q) b( ]1 v0 t' v7 n7 I0 z
(1) from <statement sequence1>+ E: y; U# _8 Y' V8 `9 {* F
until <condition> loop
) @ H2 y: k' i# g) l <statement sequence2>;1 t( j$ Z; `9 {" N% E- Q
end;
# F8 i2 Y* F& ? (2) while <condition> loop$ {! V" Y3 k( d6 q. D# w0 v
<statement sequence1>;8 Z2 x1 L& F, Z" J, B
end;
% N! n9 p; C8 S# p9 r' C (3) repeat
; o; y: N6 j# _0 M7 P8 U* _ <statement sequence1>;6 |3 x/ }' y4 {# o* B4 l
until <condition>;
0 ]1 V2 l/ s; o) W7 E# u: }# D. ]1 Q (4) for <condition> to <condition> loop/ Q X( d+ {$ W! U
<statement sequence1>;
( m$ ^% ]0 G: g+ A2 } next;
; Y7 b3 L, y p3 g3中断语句
: b( I4 g4 |& }( y waituntil <condition> prio <integer expression>;+ g4 a% C2 H+ \( Y( g3 B
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以上为常用的函数!* C& O/ N9 A C) a
还有很多,如有需要我把资料发到你邮箱里 ' [2 V. K! p" [0 `5 F
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