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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
# P$ R& N# R* @; g if <condition> then
: ?+ ?( X+ |4 I0 G- ~+ C, E! x <statement sequence1>;# X& A1 [/ E6 O
elseif <condition> then( @9 O- H7 R0 R" r, B" |4 Z" s
<statement sequence2>;9 D6 y* T: R) I
else * H3 i# }! q: ]% n
<statement sequence3>;
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如果分支比较多,用:
# K! U2 M0 {. T' l inspect <expression>2 E+ K: @" ^: q) P3 s$ ?
when <constant_list> then
$ L1 T6 B$ P: Z1 Q <statement sequence1>;5 k4 v7 n1 C: y. q
when <constant_list> then8 S+ T$ E8 M! n( q* v* z1 u
<statement sequence2>;0 z1 p5 n3 s. _4 J. c
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else
% R& l* G Q4 e& G( H1 ? <statement sequence3>;5 {+ l( i: X- ~
end;
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2循环语句& B5 P. B- {% o6 H+ P
(1) from <statement sequence1>
7 y6 T/ }5 S. c2 y: r+ \ until <condition> loop; G- O9 T9 N1 }7 v0 e6 y: e
<statement sequence2>;
9 G5 O9 v! w6 X; { end;
" R, [4 O* x8 E) X' X% R6 R (2) while <condition> loop1 N% u) @% ?. r7 j' }; t
<statement sequence1>;
9 L7 p3 g" F# x7 c end;7 g; ?0 Z4 G( Y4 Z' f3 {- F
(3) repeat $ J$ m* E# q; u! l" X& P8 B
<statement sequence1>;# ~" r: ^, J# ^* O
until <condition>;" o5 q# I8 e* q- g+ z- v
(4) for <condition> to <condition> loop
! c* l8 M" _6 j7 H' f <statement sequence1>;- W, k. H" }, [4 G4 m! j6 m5 u
next;: n8 ~8 R* G. Q* E6 V
3中断语句( Q+ }/ N( b3 @/ a
waituntil <condition> prio <integer expression>;
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* c9 ?, w! W4 {. B5 H5 }以上为常用的函数!/ e( w0 v" T% c) E% c. o
还有很多,如有需要我把资料发到你邮箱里 $ k! S1 E6 i- `
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