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发表于 2012-11-13 08:48:12
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1判断语句
- n, v, T! l1 r if <condition> then
% y1 D2 O$ X7 E <statement sequence1>;8 Z7 Z; i. Z" ~ B
elseif <condition> then
8 p) L( `( b8 D2 Y7 D <statement sequence2>;
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<statement sequence3>;
' k- ^. p3 c( ^7 D8 F end;
$ p5 B, M! G. R5 r如果分支比较多，用：
' \" U( x2 @" ]; ~% L; o( V" P2 _ inspect <expression>( y" {7 w3 \) I- ?2 D& @! h
when <constant_list> then2 {& {* u+ b# y y" P. S, H
<statement sequence1>;
; N. s9 P+ A' x- b3 d9 ~ when <constant_list> then
5 {9 s* O7 C) G9 f: F <statement sequence2>;
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else
: m3 i E) Z- l% F) C) } <statement sequence3>;# L2 D3 J1 k8 U% i
end;# E. l' H: c1 r* W. m1 J% A8 M
9 ~; G- S4 [ S4 ]: l* t2循环语句
' D3 V4 L7 I; n$ o (1) from <statement sequence1>
) L6 \2 X# o" l: C until <condition> loop
: w O" L6 ~' f <statement sequence2>;% e u) p/ Z! d- |) a
end;& [2 }9 P; A0 L+ j9 C5 C% B
(2) while <condition> loop
# k" W6 s( f6 d- p2 T6 ~ g( o; V& o <statement sequence1>;% ~4 [% M! `- h( ~$ U$ \' P) a6 V
end;
" W- v$ k2 G8 k2 c0 } (3) repeat
5 V/ b: |4 Z, k+ @1 s; {( h <statement sequence1>;0 e, r0 O, \) J7 N
until <condition>;
& l7 M8 t5 q3 b (4) for <condition> to <condition> loop
' Z* [* n3 ~+ P; W0 C: N) U% @ <statement sequence1>;+ W6 E. z' o3 {) W0 X+ J2 w
next;
3 W G t, E; E8 {5 D2 O3中断语句
% T+ C7 |" p( s! v- B' ?( s( f' u0 T waituntil <condition> prio <integer expression>;' Q- m9 _, @2 ]' D% ], U" n# B
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以上为常用的函数！
, U8 Z; m9 N" K7 B) R4 d还有很多，如有需要我把资料发到你邮箱里 0 b6 }9 ^2 R+ I1 u0 g( s* E. H
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