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发表于 2012-11-13 08:48:12
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1判断语句6 h6 l1 Q k, t6 U
if <condition> then
3 w( K4 p, z! k0 o9 r7 N0 U! u$ L" }& ] <statement sequence1>;# H. C4 D' W* d j' O5 Y# t' C U
elseif <condition> then' b" I+ i& |& o
<statement sequence2>;% E* h3 y7 C+ w! {: \; L9 w
else ( v- [5 c9 L# B- G7 V0 }
<statement sequence3>;3 ]% Z; ~9 S3 F# E. b
end;
9 f% t* y% f9 ?/ X) ~如果分支比较多，用：
/ E( I2 Y9 H0 T inspect <expression>4 P q. ?5 Y# `8 U* t6 e
when <constant_list> then1 a' Y$ n% V$ F* |
<statement sequence1>;
) z* v0 U: G9 h, O$ g( t8 Q when <constant_list> then8 _6 h% L* \; i* I8 Q- u
<statement sequence2>;
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else# x9 p; ?- Y7 {
<statement sequence3>;
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$ J9 p% I* ~, p2循环语句
5 l$ S7 H2 _8 U. g- I3 \5 R (1) from <statement sequence1>4 _) \0 }: t, `! Y' j6 n+ T3 ]
until <condition> loop
/ d1 r9 _; E5 U5 e( U! e, p" l <statement sequence2>;
, { h) L% }2 {0 K. V3 C) H* q4 x end;: `# R5 _3 h o/ G. Q
(2) while <condition> loop
0 \/ Y0 \9 k' X4 E/ w <statement sequence1>;
2 Q3 x) r+ H4 k7 |! r; v end;
# [& H- a7 k4 I+ \( M. e& J1 V (3) repeat
3 y" C+ x+ D0 q: Z4 j <statement sequence1>;7 }: P+ A8 s* T* W! x
until <condition>;( K: i( @% G$ S* @) N& R" P, }$ y0 o
(4) for <condition> to <condition> loop! N- F/ y: e# K
<statement sequence1>;; Q/ B U1 x7 T$ e$ Y7 |0 J1 |
next;
8 k1 U& T( I5 \6 ]) R3中断语句
5 e- B) V3 D; w. u0 W waituntil <condition> prio <integer expression>;2 i {; m* g. L6 S% O) k2 `4 t+ L; ?
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以上为常用的函数！
" ~2 D$ i# x- Y' a/ k: e还有很多，如有需要我把资料发到你邮箱里
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