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发表于 2012-11-13 08:48:12
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1判断语句4 f; F8 m* M, w- ^# o( r
if <condition> then0 ~; @; P7 E( R0 Q
<statement sequence1>;
- \3 o- r8 Z% \* I$ l% E9 B+ V2 m elseif <condition> then
( P3 W# C' R) G# f' w9 V <statement sequence2>;
2 ^1 c, T) l6 H" [7 F% t5 L/ t else & O: {3 M. K' Z/ G
<statement sequence3>;( N. H' J5 A% |
end;
; C7 X P# g( N. d/ V K3 `# f4 r如果分支比较多，用：
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when <constant_list> then' q0 t: _. X. ^" W
<statement sequence1>;
, Z% g7 |! e( y! ? when <constant_list> then
; x& b; j+ ~9 K <statement sequence2>;% U( v9 t+ {' K* L( k3 U
...( C0 y8 u, E$ j3 Z; M0 O* ?
else$ R( ]8 ]# O4 d# J
<statement sequence3>;9 W$ f# z# T n
end;
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. y( _, _4 o) [* m% O& Z4 l2 ~- ]2循环语句: V" k+ D; K9 [
(1) from <statement sequence1>
& `, K3 d, F* ?; o8 ? until <condition> loop9 z2 i7 n |' v- _2 D, u
<statement sequence2>;3 m# i* t/ Y" M! [3 x
end;
H& ]- U0 J" M' H$ p7 N (2) while <condition> loop
4 t) J: L3 Y3 s+ n3 t+ t, ^ <statement sequence1>;4 ]9 G8 {$ B8 H+ h% v: I
end;8 Q0 j, h; w: H/ Y! P! X9 `
(3) repeat
5 i7 Z9 H" S) T" V <statement sequence1>;
! N4 f7 J _3 v0 ? until <condition>;& H0 j6 R8 P; w6 ~
(4) for <condition> to <condition> loop9 w4 t( J8 ~" x
<statement sequence1>;
# A0 H" D( K! A$ q' ^+ r+ t next;
, E: l% t' `4 ^3 |$ N s0 f3中断语句% S4 Y+ a* q- ^9 W
waituntil <condition> prio <integer expression>;
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以上为常用的函数！. n9 t; \6 I' q8 Q$ D7 {
还有很多，如有需要我把资料发到你邮箱里
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