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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2 ]5 W: S* K/ p! S0 N; Z' e" W" y2 Y
if <condition> then$ j) o5 m( ?0 S. y: k: a u1 m
<statement sequence1>;' D, K+ T& e/ j; t
elseif <condition> then1 ]: g3 x/ { Q' z9 K4 M5 V i
<statement sequence2>;
7 S7 s9 i- Q4 w2 Z% L. a" ^ else
! J& s5 u1 t- E* r <statement sequence3>;& T& I! p! [+ s" P
end;% ?6 i2 b- W& n) x
如果分支比较多，用：
/ M4 G* e7 E2 l, @4 O: Z v7 x inspect <expression>- w; E$ I2 T+ `" C% G3 @
when <constant_list> then! x+ s7 M1 p8 s5 ]6 m( I
<statement sequence1>;
; n4 E [3 x: B: A% c, P/ @( g4 m when <constant_list> then* o P: o& A8 j" ?9 Y/ d* h j. V
<statement sequence2>;
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else
5 |5 @' B& f/ M" t% {( d) e1 | <statement sequence3>;
v) U3 r' C: t0 R5 W3 B9 w1 B, `end;
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2循环语句
+ Y& F! ? k2 t. h& s0 \0 K! q (1) from <statement sequence1>, U) [3 w7 D f0 {1 M% B) _
until <condition> loop
$ _2 [2 Z" M6 I5 ] <statement sequence2>;
0 [: I$ {* j; `7 R end;2 a0 y! T% O( A: j7 i8 @
(2) while <condition> loop
6 F. O/ `$ @) ]) ]( i6 O <statement sequence1>;7 y1 Q; `+ p8 u j/ r
end;, ?0 k! R* I a+ t
(3) repeat
$ J6 s9 ]; [( ?/ y" g0 L7 d ]- j <statement sequence1>;0 a0 a9 s- K+ u" B% P% M/ z9 m( S
until <condition>;
$ B, A N& d* X9 @' f4 f (4) for <condition> to <condition> loop4 p0 B6 W3 S7 m6 k
<statement sequence1>;* G t( L/ _+ @2 V1 K3 {0 h
next;( Y* ]( x& r8 _) X. M5 T" ?3 k7 w
3中断语句0 o5 O3 _& {5 n' p- ~( i& }
waituntil <condition> prio <integer expression>;
% ^3 [; |. N. i8 n' x' j0 N. a7 \" i) E8 t0 a: I
' r5 O/ H; j+ y; N- x6 M以上为常用的函数！2 j' O; @, s: O- U6 I
还有很多，如有需要我把资料发到你邮箱里 : O: ^/ p" b9 S( c9 h
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