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发表于 2012-11-13 08:48:12
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1判断语句6 Z9 \# |/ b" h# y, V6 J5 T* ]0 [
if <condition> then
; t/ j: r$ m" _/ N+ R! r' Q1 a <statement sequence1>;/ A8 b/ m' C9 d3 ?
elseif <condition> then. l3 J" G2 }- Z6 Q2 D
<statement sequence2>;& z9 y* [- ~2 H, B
else
7 _' m9 U# _1 Z. K, g4 c <statement sequence3>;
3 g$ }4 N: T. N5 P0 D0 f% _ end;
5 m3 |/ f% r* o2 w如果分支比较多，用：
. s/ ^4 {+ E) f% u3 X inspect <expression>
+ f# Q7 E" _& ?; a& r; ^( { m when <constant_list> then
7 {- x7 f) J+ E/ e0 X8 E6 ]/ f, y) j' @ <statement sequence1>;
- z" C, x0 \/ e% d when <constant_list> then! D/ b+ R& o# A
<statement sequence2>;
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else8 l b5 b, X; ?+ F2 m$ W% X2 f
<statement sequence3>;. \3 h5 b5 F% B, D
end;
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2循环语句
- x$ _/ x: y' O# Y" j' T5 }2 G (1) from <statement sequence1>
. Z) Q3 t% a- | U6 | until <condition> loop# M, F7 A5 `* q' g( A- {
<statement sequence2>;
1 h" k1 ~) C+ w5 _8 m. A end;
4 W5 ]4 `% L' x0 R* X+ }7 i& n5 V. k" I- a (2) while <condition> loop
. h' Z& b/ e- L5 G( U <statement sequence1>;
# I2 }5 [- e( p4 y end;
# m0 x: b# k6 l% n. Y$ @' n/ D (3) repeat
/ l/ s) ~ J6 N' o( M: ] <statement sequence1>;. T9 i% M/ O. s0 ?
until <condition>;( }+ L7 A4 L& E8 ?- c9 E
(4) for <condition> to <condition> loop
* M% z" R% G& D9 G f8 Q; u <statement sequence1>;: G7 m" N U# r: O+ ^6 R
next; q: s& b: G t, J3 ]! o
3中断语句9 u! D6 q+ ], P
waituntil <condition> prio <integer expression>;: U$ c; ]4 Y/ o k+ Q. [ Q. z( o
: A) P( v' l5 r
+ \+ ?1 V F( x- b. k6 I# ?: J1 s以上为常用的函数！
0 _4 y9 p& Y ?0 V3 t还有很多，如有需要我把资料发到你邮箱里 ) x0 }- J N& _2 Z& _. @9 H
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