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发表于 2012-11-13 08:48:12
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1判断语句
, F& e0 E* y9 g( c" q% E if <condition> then! L5 E0 ?8 S) \1 r/ I# H
<statement sequence1>;
6 X/ Y/ X7 K4 \+ f* V& o8 r elseif <condition> then
; J/ i3 z* S. |1 J2 L <statement sequence2>;; Q2 e! v, b4 T6 j5 l2 b% {
else $ L7 Z g& \4 i
<statement sequence3>;
! M8 T# ^- F* Z4 z! R, }! ~ end;
6 T) a" I3 d) w0 X如果分支比较多，用：
& Y* [ G3 s% F8 N. l2 f3 |* s6 ` inspect <expression>
) ^5 K( \- B8 y. c C: ~ when <constant_list> then0 l, @+ ], J$ d# g) j6 n1 q. {/ w
<statement sequence1>;
5 g6 ^0 P l6 W. { when <constant_list> then
6 F- W U0 @& E1 u6 Q& r6 \2 F <statement sequence2>;, g! ]1 H: T$ h2 r2 R# s
...; o& q s S+ @
else' a2 ` N- R0 A6 j0 @: X+ G
<statement sequence3>;# j7 b* S4 c% w# @* W* I3 r
end;$ F9 Z8 ]9 e1 I- A& k, X
" w; O/ r3 v I& C0 j2 f2循环语句+ m) y* r6 Y4 ^$ [3 J
(1) from <statement sequence1>2 {# r! D0 `- }& Y! l2 H1 D
until <condition> loop
( I [: V& G9 M5 F <statement sequence2>;; Y+ J: b# }' x* L6 O
end;8 y' l8 I* V- c0 y" j
(2) while <condition> loop
: i% k$ h& z7 i0 |; K1 O" X <statement sequence1>;" R/ j3 q8 J3 y; U# k% f% |! m! m
end;
- H0 K+ z& ?& V- p, K" _; o$ s (3) repeat + ], n2 K! A6 j; A& ~
<statement sequence1>;; t, g A C; A1 B9 d4 H- y
until <condition>;3 x x/ _ A( N7 Y1 H r9 b
(4) for <condition> to <condition> loop
% j( a9 A% g9 Q. J0 V <statement sequence1>;
5 I4 b) t" y/ c$ Z# o% X! S next;
, i: @- p* o" `2 X, I* c3中断语句* J& R; u/ R; ^7 k; u
waituntil <condition> prio <integer expression>;2 b- ?1 T& i9 \9 X+ Z. i. E
6 }! s+ J: t# W n0 F0 w+ ~/ \ o7 c A0 h0 ^7 `+ \% _
以上为常用的函数！
+ _1 S5 I7 z- H; g5 P$ O还有很多，如有需要我把资料发到你邮箱里 9 u% |- y7 A9 s% U7 a' K
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