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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
y8 U2 D5 v, Y( e7 M if <condition> then
7 D6 a5 q# e4 ^3 J <statement sequence1>;
2 c0 z: i- O$ V0 s8 v elseif <condition> then/ q1 |* S# m+ W/ _
<statement sequence2>;$ d, @2 @! t6 h: M2 E3 P: {0 I
else
) G& k6 X$ i; @: K8 J. o* ~, } <statement sequence3>;
6 {3 h s6 k5 R; W( k$ q% v+ a end;4 H: W! t6 w1 }4 X) g' }7 N
如果分支比较多，用：
) ~, Q: ^. `& Z6 I8 O+ w inspect <expression>
) @4 P5 m/ c+ k6 w( _9 i* u) `9 G when <constant_list> then1 H3 E) k' ?8 o8 J
<statement sequence1>;
) W8 B- |/ P2 X! J* u, q1 V; V when <constant_list> then
. g( f! W/ S0 I3 W' K( r | <statement sequence2>;
- q" W+ g) M( u6 @9 P5 Y8 ]1 } ...
: w8 C2 \9 [; z4 z1 I: ^3 m9 H else) i5 Q3 H4 A4 W$ a) c* Y# v
<statement sequence3>;
3 r* g1 j% t' ~! |/ f0 A" `end;# \0 N& a: ]8 ]- H& b& |/ G2 f$ s
+ @. a9 ]; E- K2循环语句( j: T- l3 n8 Q' s: x$ x# z- Y+ `+ p
(1) from <statement sequence1>
- r3 ^- n& e( f" P2 ?9 T0 }9 r until <condition> loop
+ S' E* s% P2 p7 D' M' i- ?% Y <statement sequence2>;
& d# V! Z J0 A8 Y% C end;
5 r6 O. K1 \5 r& j, [ (2) while <condition> loop
8 r% |6 S0 {3 q' T4 h5 _, P <statement sequence1>;
+ J+ i& M! E( A: j0 ? end;
: {2 q' J! T9 U q" ]( _0 A" @( i( B (3) repeat
7 p+ [! j- K0 [( c0 N4 |) Q' {9 Q <statement sequence1>;
; F7 B. a- L0 F* p( `) _$ k' w until <condition>;$ C8 s" o$ ~& D! n
(4) for <condition> to <condition> loop6 ~ R$ [ Y' a5 U' ?8 f' k+ ]
<statement sequence1>;6 p+ Q+ K4 q# n5 t3 v
next;0 w) g1 I. Z! S" z5 ^% {! b
3中断语句
2 l& ~! T; k# V* B; o3 q, G8 c ` waituntil <condition> prio <integer expression>;7 O7 p. z: A; |) B
3 M1 V* a) e. \5 Y, \
0 A [* u* E* U) v* j- u以上为常用的函数！5 _! p2 w1 | q
还有很多，如有需要我把资料发到你邮箱里 7 ^- z+ j4 }/ C4 k" [5 g# b) |
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