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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4 I- Y1 r3 }' P$ k% {5 p$ ?
if <condition> then
5 o; a2 w/ d1 M) U H" }* x <statement sequence1>;
8 i' k$ }8 a. j, L) h( g5 a elseif <condition> then q% @2 [$ F$ h7 p+ Q
<statement sequence2>;7 H, W8 Q* t2 f' i, J* }7 }( @% o! P: l
else 2 l7 b$ b' B& l# f7 o& j. [ g
<statement sequence3>;9 Z5 N4 ^; U% a' m. k8 E9 m
end;
5 X! G1 |, u2 ~# C+ o0 K如果分支比较多,用:
# u* R) p( p8 ^ inspect <expression>
5 Q0 D% W! [+ @) G when <constant_list> then
1 I# i: V8 r3 l2 P <statement sequence1>;, L; L x. ^; F% @5 B2 I, P; V& i
when <constant_list> then
, [- E# d' |; U( |4 O0 J <statement sequence2>;$ W( A; |- R6 A/ p6 a0 P# _
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else8 j! a4 x* Y- E# T1 W
<statement sequence3>;
0 M: _( I0 W& W( ?4 Jend;
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1 _( S# X5 \8 [& l( o2循环语句
, n# ^5 J/ L: L) |& ?) e+ i7 W F5 N (1) from <statement sequence1>6 v- M4 @: W5 w' J! K
until <condition> loop
$ A. c1 b* v( Y% P) V <statement sequence2>;1 U1 J8 l, {3 D7 M$ P1 a q
end;
: f. s8 a7 q. @. U1 z6 Y0 Q (2) while <condition> loop
' y/ W; [* k9 I: L$ k2 u <statement sequence1>;
$ D- |2 @2 H/ f \ end;
4 p* R* Z& \# x8 z- j8 S3 { (3) repeat 8 Q6 o' M6 Y; H7 ]* W
<statement sequence1>;! A( V( ^" N) R; h8 M$ u p
until <condition>;/ K. D3 h. z2 k8 j1 a
(4) for <condition> to <condition> loop- t( v' z! W% u# N# l, c8 s% i7 P
<statement sequence1>;1 d$ ]) a8 q: {! m+ h* }1 L; K
next;. O; P% |% u3 @1 B9 B7 j' x/ Y& X
3中断语句" D' F- d" N/ b; }- U( @5 s
waituntil <condition> prio <integer expression>;
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以上为常用的函数!: C4 o) D4 |3 ]: w% @1 z* k
还有很多,如有需要我把资料发到你邮箱里
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