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发表于 2012-11-13 08:48:12
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1判断语句7 S c; L! Q- I7 p
if <condition> then
' j4 u! Q" h! F4 o, w/ U+ { <statement sequence1>;2 y9 z7 F8 H3 Z7 d4 O* Q! c- a4 X
elseif <condition> then( m! v' i* e" Z$ n
<statement sequence2>;
& W0 k3 M$ N+ m5 E5 @ L8 p else
. q6 h" ]2 K# S$ X <statement sequence3>;
+ p% m; m7 D$ B8 E$ Q end;
" [9 @% l: x2 C& `如果分支比较多，用：
; g% e4 i$ n. V+ ?0 Z. } inspect <expression>
7 Y1 X2 p) F3 C: z4 t9 m. u when <constant_list> then
: H- U+ J: ^! W2 [1 ~$ _ <statement sequence1>;& M) q. T$ k! ^9 N
when <constant_list> then! M `4 U1 y& `( V9 R. S3 p; I4 R
<statement sequence2>;- Q% u: @1 N7 Q3 `2 K7 w
...
6 ^) d. s9 @5 `4 W1 p else D) m2 l& Q$ s; A2 J
<statement sequence3>;! C5 s, D/ o3 q: W
end;
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2循环语句4 C; z! T7 M! ]' M6 i' m8 {$ F6 X
(1) from <statement sequence1>
5 k& z) n$ V% N" m: @- a until <condition> loop# F5 J1 ~( y( U7 r+ H/ ]
<statement sequence2>;" J8 N% `% u b) q0 A0 Q! s" Q
end;5 t# s* X7 i% L2 ~4 R' q& U8 M
(2) while <condition> loop
+ C }9 E K& y! a: m <statement sequence1>;; J5 J" Y! r+ D. x0 c
end;% I. Y# a2 J! d& y1 Q" n0 N9 Y
(3) repeat
2 A3 C5 M+ o8 d& [ <statement sequence1>;
: |# l3 h% Y8 C" v/ W# i2 y until <condition>;
% Y' ^( `" V2 V( X5 {/ \8 d* x. y (4) for <condition> to <condition> loop( M& d I. ~0 S8 X1 W
<statement sequence1>;- j! X4 `$ D1 o0 X6 ?4 ^
next;
0 A+ B; b" A* n2 {2 Z) W5 \3中断语句
) Y" H; r5 k7 K8 c H waituntil <condition> prio <integer expression>;
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" o8 w( u( @% m2 @以上为常用的函数！
, y$ i+ h; C: k1 {! j还有很多，如有需要我把资料发到你邮箱里 * d; e/ g$ n, b9 F. w- p, ^9 l
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