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发表于 2012-11-13 08:48:12
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1判断语句: T* P0 P. z4 E+ j i+ M
if <condition> then+ ]& i9 c5 v' t" x: ~
<statement sequence1>;6 e; F% F: b3 S
elseif <condition> then4 U% L3 u1 r0 U8 u) }
<statement sequence2>;
& \' p; ?/ _7 l6 {; W8 h1 R7 Q8 { else # U& }$ c" C* h$ ~7 b
<statement sequence3>;
& R" S5 v. X) P8 l end;
3 Q+ h( r0 N7 B如果分支比较多,用:
; s* k ?0 ]3 u" H$ _0 B7 f inspect <expression>
# i% ~1 H' w5 K0 g! P5 @) [0 z when <constant_list> then( k* p8 W5 \3 h6 E& J! i
<statement sequence1>;
( D4 I# ]5 g! Z3 p0 | when <constant_list> then
# X5 j, t! B6 I8 n& J. M9 [ <statement sequence2>;
0 c) V1 x g; u% t( @2 @ ...
! G7 d; W9 M1 E* F: X4 M. h else% o9 P( Q; ?; d; G" a
<statement sequence3>;
! @+ w0 W# L: A% J5 l- qend;
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2循环语句
/ o4 H4 x$ G& r0 R' V: s# e, }$ Q (1) from <statement sequence1>
5 w" Z# e- E9 J5 [5 M: E, H4 I until <condition> loop; n( O6 @6 s0 q+ }4 d
<statement sequence2>;+ G6 S# y/ H$ M7 A% g
end;' A8 E5 [# L! i% L* c( a! g0 @
(2) while <condition> loop1 F( \$ u8 _9 C3 U2 S
<statement sequence1>;( Q4 w8 |9 d& h# X+ \3 w- `
end;
. {! e% _# a' L- F (3) repeat 4 T, z& a( D; h9 b: G# O; j
<statement sequence1>;
! |3 N" ]1 @8 t until <condition>;4 W6 l! T. F' M* \$ g
(4) for <condition> to <condition> loop
8 p" i4 |$ G1 j* A# e% ^0 O <statement sequence1>;$ R/ N6 A R/ m9 `
next;# q y4 q( g! v3 e6 M4 h* v$ ?
3中断语句
, U n1 ?2 \& P0 U waituntil <condition> prio <integer expression>;" p0 R3 L/ G% A) a
8 O9 R( ?& ?2 I$ R }, E
6 e5 s6 M& C" B9 r& P0 f; V
以上为常用的函数!
( u: L" w0 \( A; s& n还有很多,如有需要我把资料发到你邮箱里 / ?- b9 C$ H* M- p B! t" C
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