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发表于 2012-11-13 08:48:12
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1判断语句5 J5 o, M+ g. q- u; Q
if <condition> then
5 D0 J3 z+ t) k* s+ o1 W <statement sequence1>;
+ I4 I$ o" r" \; s. |3 ` elseif <condition> then; v8 j% E4 D& U, Z8 g
<statement sequence2>;1 N- X# F' ~6 o1 O8 O: t1 e
else ' Q- F0 g5 x3 `0 J& h: Y' }# q# [
<statement sequence3>;; a0 r6 J0 g: l" H2 b! |
end;
5 y9 X( y8 v/ A6 }如果分支比较多，用：
9 U2 y& a$ h& {( J6 M% ]' r3 y inspect <expression>" V0 ^1 E- C- N6 j
when <constant_list> then& }. ^5 q u9 h! n) j2 j
<statement sequence1>;
; Y2 k4 `$ ]9 d. W- t when <constant_list> then+ v" x& G) s: f( w' w+ V% ]) f
<statement sequence2>; G6 V8 u0 P; j6 V3 \- n
...
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<statement sequence3>;& L4 [, _# W& O/ j
end;' m5 Z7 H) h* K1 i9 ]7 Z5 C
6 @4 x1 k/ z( T; _. ?9 i2循环语句
+ C( i8 S1 ~1 o( e+ w (1) from <statement sequence1>* I1 d' `: S6 X! r9 B
until <condition> loop
: O/ {% B! |; B! Y- O2 l/ i' {) o <statement sequence2>;1 Y7 U' ^1 f; U7 b7 F) H3 Q) h
end;. v; A V, T# s$ _8 a- w
(2) while <condition> loop
9 y6 S" i% j7 p9 \- j7 z; y# l( p <statement sequence1>;
( n4 K$ ]6 `- d. ]2 X6 S5 r end;
2 Y- u/ G" T7 c8 Z$ F% s (3) repeat
( @- E+ M2 C' d B! r4 g! [0 X <statement sequence1>;! A D6 f3 S2 L
until <condition>;- S `' x3 a7 n( A- H6 a. G4 Y
(4) for <condition> to <condition> loop# ~/ s2 e# |$ n3 d! _5 S
<statement sequence1>;
! W) [$ h' F9 v next;
; i0 [7 C5 w8 M% n3中断语句
( s* N8 K" j0 r: ?% E2 O waituntil <condition> prio <integer expression>;* C' w+ c9 \ b9 ?+ e7 r
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1 C3 h- k q) A0 T6 l以上为常用的函数！- c' s8 G; n( `
还有很多，如有需要我把资料发到你邮箱里 " \. K* z9 ?, u2 Z. {. m& ^
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