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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. |0 D( t4 H+ p, A9 c8 {2 L
if <condition> then
% ]- p/ m8 O3 v4 M <statement sequence1>;
. @$ D& h k `$ x3 |( @# H elseif <condition> then) s6 n# @( `! B1 `5 t
<statement sequence2>;
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<statement sequence3>;/ g: j, l9 K7 x8 o' e( f) O: a
end;! l& L& ^9 q# }, i9 l N. {
如果分支比较多,用:
; p, b* S! V f; f0 l6 M* m inspect <expression>7 d2 j0 e t: U$ T4 |
when <constant_list> then9 c$ t5 V/ E- V. \3 Y5 o) S% {9 t
<statement sequence1>;
0 V. s9 f. ~+ U& ]' b% r# W* _ when <constant_list> then
" H& T/ {! }( ]! l <statement sequence2>;# W. F4 y5 X& |8 m' M
...+ ?/ p/ m/ e2 ?% v x
else
: z- B) E- Z# a/ m/ y2 y <statement sequence3>;4 V6 H( {9 M# l; Q# C5 K* {, N* ]
end;
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2循环语句
1 m/ @5 \8 } s: R' ]0 s' g (1) from <statement sequence1>
; d# o; {; ~1 e5 S. [5 Q until <condition> loop
% g) C/ B q0 P) Y <statement sequence2>;/ |/ ]9 P1 ?8 H, n- M- q, }
end;$ G# x$ j! F* A
(2) while <condition> loop
* V+ V" A2 w- x. J; I$ r; q F <statement sequence1>;
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(3) repeat
9 ]! X$ T3 W; Z; b <statement sequence1>;
7 B# U1 X* Y% H3 W- P until <condition>;4 j6 |8 ~% m! ~# y' K
(4) for <condition> to <condition> loop: Z3 N) @2 Z! J- t$ z; y1 R
<statement sequence1>;
% z2 `3 e5 V1 o6 @, s! _; [ next;1 \0 Y& Z: n6 B4 |3 ]
3中断语句
: j. n- p5 W H0 k) Z N waituntil <condition> prio <integer expression>;
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以上为常用的函数!# P; v% u5 t$ N- h
还有很多,如有需要我把资料发到你邮箱里
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