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发表于 2012-11-13 08:48:12
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1判断语句5 _9 l6 f! g, S8 `
if <condition> then$ i9 x1 u1 [ ?6 @& I g+ H j
<statement sequence1>;
5 b: {8 ^' P+ ] elseif <condition> then6 U/ p& a% Z% [2 s1 H
<statement sequence2>;
. O% g2 z+ H. m2 |* f* _1 ] else
/ u7 k5 K( M! D( _7 ?2 k) S6 [ <statement sequence3>;/ K. A# x1 r! ~! r4 _) y) d
end;
* V. ^/ X/ b* H1 Z+ b1 o$ ]如果分支比较多，用：
- i8 `! X$ T1 p4 v' x0 E( ~ inspect <expression>2 R; N8 n, G& A1 R! S* L' c, z. P
when <constant_list> then
* |3 f4 D' F/ N! v I$ V7 y5 g/ p <statement sequence1>;1 x% a% f/ N2 g) Q d
when <constant_list> then% w& q1 D" S% o* D
<statement sequence2>;
6 h5 i w. [( E$ E% X ...
- c3 d( d4 l! C; L: R4 s else) n' F/ R; |9 a2 H! I
<statement sequence3>;* _, H# o" L8 \! b; ~3 M
end;
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2循环语句
% ]/ w- \+ _% z- E' j/ S4 j) V (1) from <statement sequence1>
. J# R! ], c/ B& E9 B until <condition> loop
5 }$ \; ?$ s& l. m3 Z <statement sequence2>;. _7 } e2 P4 e. S
end;
3 }, g6 Z$ e, L0 ` \) D3 l4 } (2) while <condition> loop& Q" m$ I. E b
<statement sequence1>;
4 S8 r/ J/ S' G9 | end;2 q" P$ h. X' C' g8 I |
(3) repeat 1 a( Y( V1 b% |/ \1 x: y- J
<statement sequence1>;
8 f# q/ X/ H4 Y6 r/ h* } until <condition>;
0 |0 f8 l$ J) k% C% Q8 g (4) for <condition> to <condition> loop
3 j8 N" K g8 o/ G <statement sequence1>;
. r7 X; X# U1 W$ i& g next;
) O- G- D' R5 }0 a$ @ ~: r; x. \3中断语句
% H1 X! d, p( Z B3 v! y waituntil <condition> prio <integer expression>;
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以上为常用的函数！
! ~% s& {* k3 v: G! h3 b! _, `还有很多，如有需要我把资料发到你邮箱里 4 ~* @9 [- a5 z7 q* }
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