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发表于 2012-11-13 08:48:12
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1判断语句% Z, D4 q& X; M+ X: B
if <condition> then
0 K/ X1 l5 C7 [$ l' S( j' f: E <statement sequence1>;7 e6 |! p9 E6 F+ b0 b
elseif <condition> then( f: c/ d5 U* N4 y4 n7 \
<statement sequence2>;
: @7 i5 J5 c: `" O. R else
) y" z& |$ `5 K! z' y <statement sequence3>;
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如果分支比较多，用：
1 F. O" t3 R1 y5 W4 {! f inspect <expression>: Q$ Q1 d$ M+ r; l! ^4 w, r
when <constant_list> then! X, k P9 B8 @9 R+ K0 j% d2 l
<statement sequence1>;- L8 L X/ w# |( P; o% |) e
when <constant_list> then
' k t1 G* R4 V5 k- u9 S <statement sequence2>;" Y. D7 J$ ^# @4 t! V
...$ O3 L ^% q* \& k1 X% G3 M
else
! K1 Y! T: I2 R t0 x$ d <statement sequence3>;
/ ?# N. h2 \4 P n% a2 iend;
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2循环语句
9 ^# s: v* `4 e$ S1 b* O& l (1) from <statement sequence1>
1 H) H/ X8 s% e6 z" \1 u until <condition> loop/ j6 h, S. k: f; q! ~
<statement sequence2>;
9 v; e$ p' k! M& ^ end;9 I! o! i/ M+ q, c
(2) while <condition> loop
9 {( E+ J g) T <statement sequence1>;* D" h4 l2 g8 F, E
end;
% I8 F( G6 k# Y7 S! ? (3) repeat ! C- `! e& r/ v5 R# B
<statement sequence1>;& p( z7 F& O8 X- D5 S5 ?
until <condition>;
' K$ ?5 y4 Z& a- {0 Q (4) for <condition> to <condition> loop
M3 j" m7 d z+ k! A <statement sequence1>;
5 N) k0 x) W2 L) T" f* f next;8 h: R6 f/ k. o/ k0 x7 }
3中断语句
0 p4 \+ ?) L3 M waituntil <condition> prio <integer expression>;4 Z2 A7 w* M6 _0 D. j0 D* D
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; g, t- M+ _' C以上为常用的函数！; J9 P, x* P; }3 [4 J. \1 ]7 c. o
还有很多，如有需要我把资料发到你邮箱里 - o: U/ N% |+ J6 X5 h
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