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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
4 k+ ^$ h( z4 y, N) B$ G! G if <condition> then: b% X/ p8 e4 i
<statement sequence1>;7 G- I6 H. ]$ z7 M7 L, O+ ]
elseif <condition> then
" O" X% b& k; s' ^2 w <statement sequence2>;$ Y, L+ J( S8 U5 x1 z2 H
else
$ l1 k1 b7 f8 B. M5 I" O' ^ <statement sequence3>;
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如果分支比较多，用：
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when <constant_list> then
+ C0 O$ q1 A1 i7 j/ h <statement sequence1>;
" w: f0 Y& V( _ when <constant_list> then
6 _$ {8 R- o+ k5 g2 b <statement sequence2>;
( g+ x: g* x {8 x! N3 W: f1 n ...
# n7 m) ?: K. J% ?6 ]3 ] else( |( z6 ?" j1 ]6 q8 @. I1 ^4 N5 m3 B
<statement sequence3>;2 A7 K Z& p) a% G: T
end;
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2循环语句: M# O. w9 e. E/ G' {
(1) from <statement sequence1>4 {, U1 L/ f" u! c! b3 @
until <condition> loop
7 n. @; f, g! p+ x+ e6 { <statement sequence2>;9 Z" ^% R3 Z, R- @" W3 z: V
end;
* C$ u- S) m, ~9 ?3 C' ?+ L (2) while <condition> loop5 n' I2 T& i1 y8 O, Q
<statement sequence1>;! M) Q' J9 R" X! j# b
end;
9 j# M R+ K7 ~! [' J: @" \4 B (3) repeat ! j* k6 ~; O: R+ J4 j! m: R( X% a$ n
<statement sequence1>;
& o7 K, E3 [" |/ n c until <condition>;
& r8 a* H; m9 l0 m/ t5 Z (4) for <condition> to <condition> loop
1 N( r S0 C" s" {, a: M$ R# D <statement sequence1>;
0 g: {+ i4 l# h# {* R3 E/ ]5 m9 @ next;% z0 H8 ?3 ]7 I" s, g1 W2 i7 M
3中断语句4 a, x( c& U }" Y$ l @, z6 [
waituntil <condition> prio <integer expression>;0 M5 u( F/ ` A5 @8 y* q! P5 |3 {
0 q) A) Y1 }% h. ^6 W( [* {+ \5 U& J& s' j4 z7 f0 W
以上为常用的函数！1 R+ @# e- I! ]" |
还有很多，如有需要我把资料发到你邮箱里
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