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发表于 2012-11-13 08:48:12
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1判断语句( n) {0 C' n" P/ ]; i
if <condition> then% a5 a, E' ~/ X, O! j
<statement sequence1>;; @2 l' g, S- e$ m) o( X
elseif <condition> then! E( @( B; y4 I0 r% Q c
<statement sequence2>;
! O: I' V6 N$ t else
, L5 z$ q' r; Q+ U; |$ ^ <statement sequence3>;" C) v# R# o2 h$ B' w
end;$ ^" I$ Q% j% N- e9 `4 N: A
如果分支比较多，用：
4 e9 Q) M) s, z( i( o" W inspect <expression>
- ^( G4 R3 I6 { when <constant_list> then8 F" H' n# @1 E) t1 W
<statement sequence1>;
9 R% L( ?- F* _& @ F4 k when <constant_list> then4 {- p) B) D& T" K
<statement sequence2>;
5 m3 Y3 U7 K* y4 ?, d* ? ...
3 z) m* w* C, M0 p, [( g else
- j/ ~6 h- c( e+ c1 l9 K# k <statement sequence3>;, C$ |" G9 g/ m6 D
end;
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2循环语句- N% Y0 U! B* M- E. ~5 Y9 {) j$ N6 d
(1) from <statement sequence1>' g4 j+ W' P+ M" ~- J- W+ O/ C
until <condition> loop" g% Z' `. G& L7 F% A1 ~
<statement sequence2>;: }; ?9 } V% _# _, `5 J! m
end;. A7 F# R% K5 H0 \* y9 ]) B
(2) while <condition> loop/ t p' K, Z( f& J
<statement sequence1>;
. M4 v0 U% G5 i6 j end;) M3 G$ A! o; Q- u9 H; y
(3) repeat
# A: `3 R4 r; W" h- L- r& U7 T <statement sequence1>;
+ A5 k0 j0 `3 h' ^2 G, C: Y' X until <condition>;& n L# j8 O, x
(4) for <condition> to <condition> loop. h& O$ h& y8 u, k) ]! z
<statement sequence1>;6 V. @! e" u1 ^: z
next;% w/ F: N2 `. F9 B; b8 d; F" N
3中断语句
% S( t+ J0 e/ u5 Z B& ?% K3 P waituntil <condition> prio <integer expression>;! a! x2 o) @( [6 n
% l8 N. K, r2 _$ I
. ~3 B( ^; W4 S% ]- n( [以上为常用的函数！
0 x* i* Q( U+ k6 }0 n( [还有很多，如有需要我把资料发到你邮箱里
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