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发表于 2012-11-13 08:48:12
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1判断语句 [% |0 U: U2 Q
if <condition> then
, l$ Q- z/ u8 d" p% }/ c" B4 Z# F& z$ l <statement sequence1>;; |8 |3 l( w& W; M0 b: T
elseif <condition> then
y9 c" X8 M% ~ <statement sequence2>;. E: ^4 S [1 U$ F1 g" ?7 r
else
4 d) g/ G* `% B" ]. W# A) P <statement sequence3>;# J: a9 m6 p. K4 v# z; p8 O7 ^
end;& b0 M9 |( r+ x# z, [0 [: ~1 }, l
如果分支比较多,用:. W1 i! D7 R4 [4 ]9 r; H' _
inspect <expression>$ Z( T; O; u: W$ I' l6 ~# A
when <constant_list> then
. }& \: ]. Z3 \, R [, ?& ^# ~* G/ | <statement sequence1>;2 b0 F& z& _* S2 O% X6 i7 T" ?
when <constant_list> then
0 I! w, J1 Q3 x3 C <statement sequence2>;
1 y( W" E: [ o' Z ...
+ S. t7 a/ R$ g" M4 G n4 o else
I" R' t2 Z1 } a9 U <statement sequence3>;6 X r& V" O9 O0 K1 m r( {
end;2 W6 O4 n" K! _( I7 d% z+ I, T. W% {
, q/ a6 I2 k( e% d. d- e; ~2循环语句
& U6 N" O3 q& l/ E* T' } (1) from <statement sequence1># q; W/ B, F' p3 f6 @! u
until <condition> loop
) N: B" ~3 ~0 B <statement sequence2>;6 t, }% n; P2 g+ i( a: ]
end;
2 R' P5 V9 a0 V8 _: z: u( L (2) while <condition> loop" n1 G* J9 Q) a- A O
<statement sequence1>;# ]# y* n; e9 j* J0 i
end;
) x" ?* i9 i4 C" ]' t; I (3) repeat
: w: B" D' p3 S& k/ i9 `0 s/ ~ <statement sequence1>;
, Y: m) i- K% b: E until <condition>;
& t+ Q, b- ?1 n3 [! U7 I U+ t (4) for <condition> to <condition> loop
/ `& V( W n7 @3 ~% r& c( L+ O <statement sequence1>;
3 [( ]. y! X# H0 r" Z9 Y+ E; ?* x next;
% M& U2 ^; X6 L) ]3中断语句6 Z; t5 `2 u/ U$ K0 b1 B
waituntil <condition> prio <integer expression>;# p! L6 m9 w9 W( Z' q0 x
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8 r% f3 b+ t% r+ M3 {; I以上为常用的函数!' @ j( p" i; W2 A5 o. i, [
还有很多,如有需要我把资料发到你邮箱里 1 I8 r( L7 R p: Z
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