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发表于 2012-11-13 08:48:12
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1判断语句* A! d) z# z8 e( L% P
if <condition> then
, N/ `, E1 y) y <statement sequence1>;9 |+ J% z, S& i% K9 I
elseif <condition> then
5 _9 }3 p+ ~, K) m# h5 \ <statement sequence2>;. I2 t/ I' W2 p8 i5 X+ o
else
( G6 Q' L- Z, H2 ] <statement sequence3>;2 Y9 y% {8 v$ l; B
end;( j k' R' o, j, t' I" l9 P; I
如果分支比较多,用:% q6 X1 T( b3 h2 T9 X' A3 Q) X* s" o
inspect <expression>
- C( `) A0 G+ }1 l+ P! o! } when <constant_list> then. s3 G# p8 G" U" \3 a- A; h
<statement sequence1>;. T- N3 K- Y: Q7 P$ y3 \
when <constant_list> then8 ?6 A0 w5 x1 G8 p' l8 M
<statement sequence2>;9 w$ j- `! A5 Y* C# [5 t+ L
...
2 A# o; }! o+ w else
& o" x$ G4 x" b- N6 E8 l' U$ Q <statement sequence3>;) N9 q' m9 K3 V) O& Q& Q5 `
end;
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( m4 Z6 @$ V* {; ~$ T) O! Q2循环语句6 Z# k* C9 W- D4 F
(1) from <statement sequence1>- A' D# ~' A# {. T. N" p5 x6 ^
until <condition> loop
; i% R( [6 L# D3 L' C( p P <statement sequence2>;
- ?7 b$ ]: a$ G5 k+ S3 |: H end;
( y% k3 N! z& e2 [' I' F% D. W5 ^ (2) while <condition> loop
- i; Z7 x8 J: |9 r <statement sequence1>;
8 ?+ O4 u: E; k8 }/ H5 H; m4 k% I end;
6 D) q7 Z' j( U1 m* ]0 X (3) repeat * [7 F, S8 P8 t) o" {
<statement sequence1>;3 X) M' b; S2 ]" a3 _
until <condition>;
. j: p7 e" m4 Z6 X (4) for <condition> to <condition> loop
' s( S# { B* f4 N# o/ W <statement sequence1>;, @' ^% b# r" z( I) r" n
next;
9 F2 I) A9 K# V8 ]3中断语句
" [8 R- J: _% g t$ W) _$ E5 b$ I waituntil <condition> prio <integer expression>;
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以上为常用的函数!; v8 F3 ~8 O" e6 X
还有很多,如有需要我把资料发到你邮箱里 6 z4 F9 F& ^6 G& a/ }- Q/ a
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