|
|
发表于 2012-11-13 08:48:12
|
显示全部楼层
1判断语句
; X8 B! N' a6 O1 ?$ C. H. X if <condition> then
; t5 T# |6 A- K5 i$ C8 n9 q <statement sequence1>;% Y" U$ x% S1 [& r0 {( u" [
elseif <condition> then
8 ]& t1 x9 E+ W+ N: y; k2 \& m! h <statement sequence2>;
- q. e3 Q( C2 H" D0 T4 o+ ^ else
" B k# `8 i9 C% m L" u/ d/ a <statement sequence3>;
" I0 ?* G1 j1 C% D end;1 [5 o! o4 _/ ~, z' e* V2 r2 Q
如果分支比较多,用:
( {2 M( l2 _) a9 W3 ^1 M: ~ inspect <expression>
, S6 R$ O6 W9 H1 ?2 L# W- a when <constant_list> then
9 ], C- H) J& v4 f <statement sequence1>;
8 J% S8 n; Z4 X5 @% u when <constant_list> then& h- b# H: O( w% T3 o+ ~) o- U
<statement sequence2>;
5 @; ?. X* y# l3 }' p ...0 T q& `7 m7 A" E$ U, ]
else# w2 }) O- Z% |3 \4 x4 `
<statement sequence3>;
' j& I6 s0 g, l+ [! pend;: X# ]2 d7 }" W9 Y, @
! i0 ?! R; E* H! e7 l/ ~9 R8 {2 y& I- Q9 ]
2循环语句
6 d% L$ P; N! O. e; W0 H5 p# ` (1) from <statement sequence1>; f5 ^5 [! }' w, @5 D5 l
until <condition> loop
2 P, L. M6 n3 F7 _* ~5 \ <statement sequence2>;
* l) F1 O/ n' }. ?/ ^1 h end;! t w4 E3 H) s. ?6 {. r
(2) while <condition> loop& l7 C0 Z$ @: t1 k; K- v' v! I$ j
<statement sequence1>;
2 I% u& U) r( F, P6 d; _ end;
$ ~7 `# v/ h) ~* o, V+ U (3) repeat 0 ~7 V: i. v3 s* b
<statement sequence1>;# v; D7 P8 i9 r" E
until <condition>;8 l% O) x0 {& s; h, P& i! h
(4) for <condition> to <condition> loop
* R0 Q0 ^5 Q K! J( j <statement sequence1>;/ y! i! t( c6 M( r
next;/ |7 y0 L3 M. ]3 c; l, M: M9 D/ o. s2 U
3中断语句' O$ D. k- N+ C5 s: K1 ~ @
waituntil <condition> prio <integer expression>;
. a: H8 u ]& M6 d4 x7 V, N8 }; ]$ M0 D" n5 t! {* `9 H
* m0 f; K% [0 N1 o; k j) ?以上为常用的函数!. U$ a+ B+ b( q2 t* p- S
还有很多,如有需要我把资料发到你邮箱里
) Y! E# t/ `% N
+ e- T) T3 f# o% O
" d6 g f4 J4 h( |: N$ C7 ]/ M1 J! x
% O! T) B& `/ y
. C& P( ?9 c. f# ]: S+ l1 m8 V
) e6 o) d d# R. b4 S
2 r8 W% H. ?) g& M/ j9 g5 ^, F; P% g3 q' X0 H9 O
; f# D3 i/ {8 o1 k+ K4 e6 H6 j, j
7 H6 N- b# N! w- a
|
|