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发表于 2012-11-13 08:48:12
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1判断语句
! s+ y" A; F2 t, E. {6 |& `9 @ if <condition> then1 S' O2 Y; M2 ?; H4 h" v( k
<statement sequence1>;2 _* @% o7 a7 L& S7 ]) f
elseif <condition> then v% E' }+ @( I1 b- ^( E0 g" V r
<statement sequence2>;: G" [% p! i& }/ R* w- _8 v) L
else 8 E9 T! N5 O$ J* J: O
<statement sequence3>;7 V( ?) U+ _# t8 Z# i9 t( O
end;
+ s$ i( H, X- Y1 W( t/ k如果分支比较多,用:
/ g7 o0 k% d2 A inspect <expression>
6 c$ X; w. O" i6 ? when <constant_list> then
( Y! @+ l# N3 H' `7 X <statement sequence1>;& s. E5 {% X& ^4 _* f D3 A" V) c
when <constant_list> then
+ Y1 |# ^" a9 _- g <statement sequence2>;; J- U y# w8 \! i. u7 J% l. g5 W T
...
& Q( Z" R }# A" L else
$ H% m1 p2 K8 c, X+ q <statement sequence3>;
1 v; E- e8 x3 E+ Y6 ?& K( `end;% e0 Z; R% A. [! p/ b
& G7 E8 u6 h7 F7 h) ~4 W# s' | G: M1 `2循环语句) C# d* b7 F1 C% N3 [& {
(1) from <statement sequence1>
2 K2 [! D7 s O& ^; p7 w: Y until <condition> loop
1 s* P, l+ @- R: n7 y$ n8 M7 F <statement sequence2>;
: G. _. B4 M3 `9 R) d1 u- C# O end;
" p0 z- m3 `6 E (2) while <condition> loop
; c% i0 Y# s0 I0 ?- f0 Q <statement sequence1>;# i1 Z0 D' A; w* m+ y9 p" V
end;
# Q5 m' M) N: ^/ M1 K2 i (3) repeat 4 C& `- S# J3 @7 a
<statement sequence1>;
' `/ X0 f) _7 v; Y } until <condition>;8 A4 W2 i* f6 Z+ n
(4) for <condition> to <condition> loop- D7 o& b P% |& ]- C" I y
<statement sequence1>;
7 ]: q; ?$ `& H6 Z next;, P5 ]# ?9 K% p/ U. _5 s
3中断语句
1 X4 n" ^+ N( D& n waituntil <condition> prio <integer expression>;
" o, w% H- _/ q: U' e/ k: N4 O( ^3 Z( B. p
+ L9 A! ~# X3 ]0 B以上为常用的函数!
( g8 w; ?6 I7 L g" i还有很多,如有需要我把资料发到你邮箱里 ; p0 e( L: ~ l8 [
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