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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
, G* K# ?' V, f( S if <condition> then( ?: Z; X, u- D) z. |& y. u
<statement sequence1>;
4 U0 U$ @, x, M; F4 L elseif <condition> then5 h3 ~5 X' C d; C4 X1 D
<statement sequence2>;$ ~$ u% {* I2 H+ z) }
else
, p! o0 A/ I* O- G <statement sequence3>;
; a" |5 I2 ?9 `1 A/ u k7 X end;2 w" T$ f2 A2 q
如果分支比较多,用:
' l* T- z' Y0 F: } inspect <expression>! E$ {; K- V5 U
when <constant_list> then
0 N2 s6 n7 ]) K, |0 s <statement sequence1>;
& ?+ l7 y4 A9 E5 w when <constant_list> then/ D0 O" h% w: D; q! T s
<statement sequence2>;
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else! H4 K! M$ e! f5 I0 z# Q C
<statement sequence3>;
4 o/ }, i* b. [end;
" _7 e' r' o; g
. y" C* ?+ X( }9 `6 m2循环语句# d. T/ b; t; P4 Z) p+ ~. _" ?
(1) from <statement sequence1>
* Z: F# e0 o' q" m$ R( \ until <condition> loop
* F* E1 A- B9 }6 m, c! s% \3 x <statement sequence2>;
& O7 j0 c; |+ x" ?3 M; B9 x; [ end;
/ F8 F* R3 }8 a" a! X (2) while <condition> loop9 v5 F/ M9 G4 x& h0 \4 ] y
<statement sequence1>;$ W6 D* ?: ~4 T; P7 i f t
end;
" C2 _1 B; w9 W7 c, } (3) repeat ! X4 Q. d8 @5 g4 ~0 |2 w+ B
<statement sequence1>;' L# S4 V+ G2 K. i0 G/ {/ D
until <condition>;+ w2 B0 i1 n( ^1 Y( c$ d; D
(4) for <condition> to <condition> loop
+ C( t; o/ H6 [9 l <statement sequence1>;
4 m9 w5 h/ p9 t2 [7 y( J8 X next;
3 t/ z, E5 s% P% M- X% A0 G) T/ {3中断语句( U) X f. F, O {
waituntil <condition> prio <integer expression>;
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z+ c; k/ ~% A% ?: l. c' t0 T
以上为常用的函数!& e1 g3 [1 i2 r7 {) r
还有很多,如有需要我把资料发到你邮箱里 " S4 A1 Y' {& `- p. E& Q
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