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发表于 2012-11-13 08:48:12
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1判断语句
6 p6 n; N4 X4 K' S7 n% N- [ if <condition> then) m1 E& X# |* M2 x1 j
<statement sequence1>;
0 b& P' M# h" ]9 L4 S9 ` elseif <condition> then) K" Z. K R% ?& @6 i2 }
<statement sequence2>;
5 b& G) p# r+ K$ Y9 J6 R else d$ U# _& C! q6 g% i
<statement sequence3>;5 C! Y' Y3 k1 `
end;. e! x+ n, U) ] @7 y' b u. ~
如果分支比较多，用：
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when <constant_list> then& \. W$ g& j$ h1 J7 j
<statement sequence1>;
: h3 v% ]4 C" D) y when <constant_list> then! ^' T+ k! a& l" O ^5 p
<statement sequence2>;' A; h- i0 w0 y& `& k; I# q. N
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else
& S8 F( V- d- l, J: @- } <statement sequence3>;
1 J2 s, P8 \, E6 Q( P" jend;
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$ Z: D6 t/ O1 b& {+ M2循环语句- d3 z' q' K7 Q: a' J4 c
(1) from <statement sequence1>
! X8 G& J3 W* `# U until <condition> loop9 \& P+ l3 D3 e- s# t
<statement sequence2>;
2 H4 m* W6 q, G, h6 i end;! N9 J f0 A, Z4 d. Z _$ k
(2) while <condition> loop
0 }1 Q% w" v' A8 _) \ <statement sequence1>;
$ @' ^; x, u8 X4 u end;
# ^4 P" h4 X+ |& j2 l (3) repeat
: n5 U* o$ E; P) v <statement sequence1>;9 I* f) e5 `" u f
until <condition>;
1 }. B/ s; e2 v# F (4) for <condition> to <condition> loop
0 y. U% C0 T7 w2 U) v+ H* B <statement sequence1>;4 G% U; S' f$ H& U7 y% ?) X
next;9 W$ C4 K" H% W3 o, A
3中断语句
& b3 _8 L- T ]) h3 d; C( X waituntil <condition> prio <integer expression>;! H( k7 i+ c C2 k) z# U
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9 W0 e f0 U3 j' v7 _4 Q2 U& ?以上为常用的函数！ d: ~3 g X C3 B4 Y
还有很多，如有需要我把资料发到你邮箱里 - j" Y+ ^3 Q' h$ w) o) @0 Q
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