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发表于 2012-11-13 08:48:12
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1判断语句
9 C9 Q: }) J% `! G/ I6 Y& ` if <condition> then$ y; x7 c' @" M* Y- M
<statement sequence1>;5 b) Z$ O& b7 d5 }
elseif <condition> then' q9 A$ v i* }( R
<statement sequence2>;
6 k0 H; ^" E: _. m else 3 R1 {; ~4 K" g: L: E z7 I
<statement sequence3>;
0 h$ s* b6 y0 j7 _) C end;
; i+ w) Y5 p7 c. H* ^: [/ t8 i如果分支比较多，用：
' J. B' Y M ]( z2 j. B: _ inspect <expression>3 z( u1 F3 `2 K$ e
when <constant_list> then1 a2 e3 J! @5 B( D. n, q6 E, i! W! J) X
<statement sequence1>;1 V( S7 \+ R6 `% n/ k
when <constant_list> then+ T1 L. m* g6 N" Z* E
<statement sequence2>;
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else/ v; r4 Y7 f. M. n
<statement sequence3>;0 w4 b; Y I+ e/ Z% A; N; G0 n
end;
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2循环语句4 |$ C2 I/ X# c, O; V+ K# ?. f
(1) from <statement sequence1>! c4 e# D- H! t% n9 Z# _
until <condition> loop
6 _8 N, P( l- ` <statement sequence2>;4 l9 [# ^5 m4 ~+ ]$ z4 _/ g/ x
end;7 g7 }9 \$ G$ j. n r. T; e& c6 Q
(2) while <condition> loop
* z) b6 u0 w) T" i* l- L% R/ ?+ l <statement sequence1>;
" e5 U# k3 i- r end;
& {, l7 Z( i3 y n+ C& d (3) repeat
& Y( K& M4 p4 e- d6 e: G <statement sequence1>;. W/ h: }3 ^( ^- D. H
until <condition>;5 X2 i6 c0 O& C/ c* B5 K6 [8 S
(4) for <condition> to <condition> loop$ a4 z' ?$ V& v6 H
<statement sequence1>;
4 }1 M f9 V/ {" \' i next;
' z$ l7 o& v, M3中断语句
: e& w( n9 Q1 ?9 D waituntil <condition> prio <integer expression>;
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以上为常用的函数！
, u3 \% l: q' j0 |还有很多，如有需要我把资料发到你邮箱里 . S. T8 T! O0 b* U- o1 X: P m8 `6 G
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