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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句
' X, z& C) ^- `1 D/ H/ x* s; z6 { if <condition> then
; h. A* O' t7 f. X, h5 [2 }/ L <statement sequence1>;
! I5 W8 A7 p9 Z" d. n0 o elseif <condition> then+ o* A$ n" O6 C- _1 i, o. J
<statement sequence2>;
8 L8 w. T$ z. w" n else
m4 @4 R, w1 W' N+ P( M, h8 c/ T <statement sequence3>;
; Y) z$ g$ e0 i* x: W5 j7 } end;
$ ^4 S* Z- K. ]( ^! ]如果分支比较多，用：
3 j! _% o& j/ C( u1 e, q inspect <expression>
4 f0 I K% u$ M7 n' B when <constant_list> then
1 U9 q* o9 e5 A; n <statement sequence1>;
1 S- X+ s! J7 a2 i when <constant_list> then
" i% W0 u7 Y7 E <statement sequence2>;3 g. W* ~. z- p- W
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else
2 h+ Z0 @8 o7 ? <statement sequence3>;9 F. `* Z* {7 K
end;! |$ y. k: b* \, ^4 ^$ c
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2循环语句
4 i2 W' o2 A, v2 c" w0 v. b6 r5 W (1) from <statement sequence1>8 E; N. J; Y4 [! M
until <condition> loop& {4 F/ w- Y2 a0 K
<statement sequence2>;( T- ~2 K m0 b% X5 y1 z! y
end;& z! D) F) L; C+ {8 m# m! a) J* o1 Q
(2) while <condition> loop
; `7 q) T1 G$ I8 M <statement sequence1>;) y" @/ c# R" F8 P9 |/ @( G
end;
2 p3 l# i3 P+ k* J6 m (3) repeat ) W# u! @ P9 G! v5 P
<statement sequence1>;
`0 G6 Q. U3 d& r4 g+ n9 u until <condition>;; J0 x: F7 `5 Q; A
(4) for <condition> to <condition> loop- Y& Y: E" y( B; M ~4 d
<statement sequence1>;
) k) Q3 v' C7 u8 f+ h next;
( k. m$ v2 l: v! n8 o3中断语句
& s8 Q( _7 G/ o' j7 i( m. \ waituntil <condition> prio <integer expression>;
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+ L3 Z' b8 `& y& q A以上为常用的函数！
6 Z/ Q! |; I+ I( \+ `( A还有很多，如有需要我把资料发到你邮箱里 4 U/ S. N6 f7 \% X+ C+ @" R: z
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