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发表于 2012-11-13 08:48:12
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1判断语句0 _4 |7 n J" T G% R3 H; e! W
if <condition> then1 d2 M" @3 N# ^* ?$ ^4 F
<statement sequence1>;
6 {, ?! o9 {! ^3 N elseif <condition> then
8 D. K9 b8 k( B8 M& H, C <statement sequence2>;/ P; W' F( l( [5 O# A. m8 x- X0 Q
else " i# L7 E# U. B; R) Z" W9 _5 R* y
<statement sequence3>;: T4 n! Q8 t, ^ o8 v
end;' F/ `2 E; b" z
如果分支比较多，用：
4 ~- y$ e1 R! p/ B) t inspect <expression>
3 d4 l+ K6 f! E6 C; @ when <constant_list> then! j8 s4 F, M- F" \7 v A
<statement sequence1>;
. Z3 a# v2 d5 y$ e( X) b when <constant_list> then
# l) X G( ~, _! v, j <statement sequence2>;
3 e: e* u% `# N5 w$ Q" R" I ...
8 M3 U. p, ~7 _' R' W7 y1 ~$ U else
# v3 |$ Q3 h: G4 w <statement sequence3>;
0 V) O8 t- A- H1 u' p, E( K/ c% eend;
$ f$ ? A+ ]9 g7 C
- R: ?8 G! c" L, _, _4 _2循环语句
! _8 Z0 H8 t5 z9 Y { (1) from <statement sequence1>
0 W* o& O( X* l, v9 N' v# x9 W! y until <condition> loop; u7 s" a o4 C0 Y
<statement sequence2>;/ B: }, ^4 T% h( ~, Y* D+ c
end;
6 }) U& y5 ~/ u( ~. o# d% t (2) while <condition> loop
/ T3 `/ o2 b# z; Z <statement sequence1>;# }4 R* |4 x9 F6 O1 ~: ^- Q4 s3 h4 L
end;
) C( Y/ l8 h1 a! j$ n# x (3) repeat
/ o( B" f* C: Z4 [ <statement sequence1>;, ^' L3 y1 W, o4 @/ ?/ s5 z6 l
until <condition>;
0 ^ s* C0 _, w/ v! u) } T (4) for <condition> to <condition> loop
$ ?8 W6 w" p& S# }! I8 _ <statement sequence1>;
$ R/ g4 F* b1 U2 C" W next;
" Y# ^+ ^& K0 F6 D- v: g' y1 i+ G3中断语句
' u" d6 P% G" n- [- h% c0 M" M waituntil <condition> prio <integer expression>;& ?. ]3 N/ E" L3 `5 Q- G
/ g5 ?* M! c+ U; ]$ T6 \/ |
2 Q8 I% t& v! i% V3 I8 O* W以上为常用的函数！
- m R# b& C! l6 L3 Z' \还有很多，如有需要我把资料发到你邮箱里 ! k0 O0 m1 c2 ]- I# N, N
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" x: {6 f8 [$ a
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