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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
5 C* p$ y7 k: n+ E if <condition> then
) @4 W/ u8 `2 V5 C' g0 m+ A; s0 k <statement sequence1>; W* `" ^* x1 [7 M/ [
elseif <condition> then
9 h8 [+ @. [& x) H0 \& c <statement sequence2>;% r( x. q' ]4 t) }5 @
else 3 ] {$ K7 \+ m* p: l
<statement sequence3>;
7 }3 o, k& ` i8 h0 ? end;! |4 ^! O- u: j) {! ?. A# Q
如果分支比较多,用:
8 w# C h- e* X- B. [; @/ ]' C inspect <expression>
, r# x: M; q. q1 m- ]" ~% u when <constant_list> then/ u+ @* \: Q) ]0 p' H
<statement sequence1>;. h7 S& ]& w/ Y* }* ~) @! K u* |
when <constant_list> then2 ~0 F8 V, {7 D9 `$ K; E' Q% I& x% `6 S
<statement sequence2>;
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else
# R& L- _1 X8 [& j2 ^9 U" j3 R1 J <statement sequence3>;9 _7 c- i G; H+ v
end;
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2循环语句
2 i' e6 ]& @: t$ D z H- Z0 @; H (1) from <statement sequence1>0 Y8 x( G; b/ ~! j0 D5 [. N4 p
until <condition> loop+ ]. k' @6 p2 k0 W$ {
<statement sequence2>;
K6 [; e9 v4 D7 x9 W% M( \ end;
6 X$ |% I$ q. m d0 H0 G (2) while <condition> loop
2 [( I+ ^" \3 F+ y- t) N3 V Q <statement sequence1>;
' k0 \: G9 r% k end;
6 I0 ]2 `2 g1 ?. [ (3) repeat
% y6 C3 U6 n1 z; W7 E+ _ <statement sequence1>;
2 y/ Z5 t* l, W4 m; X4 K& t until <condition>;
# B0 |. s) r! {& `$ l9 d$ ~ (4) for <condition> to <condition> loop
) ^- J) b. c) ?% A# t <statement sequence1>;
# v% ?/ }. b3 k1 H" t, N# g next;
; {" m# I( B% `4 U3中断语句
' W$ _" x% B0 @2 R waituntil <condition> prio <integer expression>;% }! ^9 U @: ^, _+ c( {; l
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以上为常用的函数!
Q/ N( _8 O. t9 }) f还有很多,如有需要我把资料发到你邮箱里 - J/ N4 m- ~2 Z( e: a* t1 S
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