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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
; X) ?2 w; X8 R: P5 f+ N) A& z if <condition> then
2 e4 [$ {$ Z. E! \$ |; R* I <statement sequence1>;
% J1 f, G9 C0 r9 c elseif <condition> then+ M+ T0 X; K% B
<statement sequence2>;1 S0 y0 t) \2 Y- `
else ; I, X$ G2 @( R _' m) t
<statement sequence3>;0 A; f1 l8 T2 O' m6 p- |2 Z9 Y
end;4 F2 A. y) v) Q* c! @2 {
如果分支比较多,用:
5 y4 f4 D% _0 s4 a7 s inspect <expression>
1 Z+ h+ h$ D* Z" J0 k* @ when <constant_list> then
) c j2 r4 {1 m4 N <statement sequence1>;+ `( d7 Y; X& l) Z, G
when <constant_list> then
4 w, \1 Q l1 k) n1 h% u/ k <statement sequence2>;
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else
- x- I8 r2 K; O0 _; R <statement sequence3>;5 t- y8 N+ A/ I4 M7 H X
end;
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) N, m E0 K: _- S) p- a2循环语句
) U9 r0 b. a+ b- \: ]+ m, _ (1) from <statement sequence1>
7 O" H& ~7 J: q6 y' P2 X% r) s until <condition> loop4 M" l- q, L/ L% U4 j2 m/ j
<statement sequence2>;
8 u6 @( B7 U; p. o end;2 x& c( B, L& X- k+ w) T
(2) while <condition> loop
! k/ N( C. v/ Z! r6 o N& ? <statement sequence1>;# w' O( Z% h/ [2 @
end;
6 g: J4 f/ ~2 x4 ~+ J" j (3) repeat / B7 P+ K& Z+ w/ x+ }
<statement sequence1>;1 k& B! k; L- L6 U/ I
until <condition>;
4 G; X* p K/ G* s; p1 F (4) for <condition> to <condition> loop
: i# L* R; E" q+ y w <statement sequence1>;) C9 ?. P& c$ n) j1 b3 y
next;
! ~7 `4 D" A7 y4 g9 I! Y3中断语句
/ v) n/ R4 Z: f* e) f+ L waituntil <condition> prio <integer expression>;% O1 f! ?6 {; n
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以上为常用的函数!( s" j) _! E7 [
还有很多,如有需要我把资料发到你邮箱里 5 k# C7 q: ]* }+ w. E
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