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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
! }' b7 s' m# D. c9 S% U: i if <condition> then
- o7 R& t7 R( }8 g& R( H# n$ x. N <statement sequence1>;: _9 h4 e4 U4 c6 `) u3 m
elseif <condition> then
& E4 W g8 Q( t( e <statement sequence2>;
5 ^1 E/ k$ `+ H- i) [5 n else
. }" C( j: R& p2 l9 q2 j: P <statement sequence3>;( z0 a6 ]! m, C3 \
end;
8 e( D# o$ E7 j: B; a如果分支比较多，用：4 \) e5 R. W( ?! I. ^! H+ G
inspect <expression>
! S K3 \9 A9 f when <constant_list> then+ b2 M ^- y. |( `0 |& c" f8 s
<statement sequence1>;# a; s7 o$ V5 b! K. b, k
when <constant_list> then
7 t% b: r* [1 M9 u) ] <statement sequence2>;4 @ o) | w+ \ C, }+ n( l
...5 b5 I: |6 L9 \- x( {0 c2 x
else( Y) u' W6 K$ U9 I/ p: }( B! E
<statement sequence3>;! n/ t) p7 z8 _0 d6 D
end;+ i; ]) l8 x& B1 C# f% @* n0 E
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2循环语句
) \& y5 x8 u0 f, e4 k) m2 P (1) from <statement sequence1> r% m" t! k$ L' n2 v/ N! D
until <condition> loop
: w, ^- k/ V1 g3 T8 V2 S8 p6 Y7 Q <statement sequence2>;
1 n/ E U8 `. r$ B* g( H" e end;
: ~' e! y5 g7 b" I. n3 { (2) while <condition> loop
" ], j% Q% w1 `! \$ c/ e, D' O <statement sequence1>;
; `( J+ I+ U4 ?9 Z8 Z0 M$ _ end;7 I6 B5 x( h( T$ _) ?
(3) repeat
1 Y# O. w& e/ T2 h7 |( l* M4 Q) [ <statement sequence1>;
+ J8 p" ~& e+ ~! w) f2 K$ e# c until <condition>;6 k3 c0 s7 {, b/ c1 ?: n
(4) for <condition> to <condition> loop
- f3 { b" F: e7 |( W5 r <statement sequence1>;
0 t5 E: O; _8 y. m8 Y next;
. C6 p) W {7 ?" [ g# J3中断语句
1 ?0 j' z# i9 u1 K5 J! p waituntil <condition> prio <integer expression>;
+ W6 i) S f$ t! O+ }( V& G5 \- b& w- o# l1 a
6 r# v* p4 P% X4 u! `2 j以上为常用的函数！; K$ M+ O3 Q0 l3 I! V7 ] s
还有很多，如有需要我把资料发到你邮箱里 $ b5 w! H; j0 z7 o# D
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