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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句/ `* c6 c, \3 ^. y3 |
if <condition> then
: w- l5 q3 e1 J# k. i7 q2 Z3 T <statement sequence1>;
/ _% _5 l" p9 e+ g8 o elseif <condition> then; \; k% b9 l% w6 X
<statement sequence2>;
# A2 l' v5 _; V9 O$ n/ ?5 O else
0 k$ {0 D( Y, W/ C <statement sequence3>;
1 S: _2 J8 m% k X% u. D' H end;
7 m: B% s2 T) R如果分支比较多,用:
- i- ]' B% G0 w4 p/ m2 `# {; M inspect <expression>3 i% D2 W; m9 A+ L, k
when <constant_list> then
( z4 {) O* L- h) M. ? <statement sequence1>;
, G$ Q/ \2 M% D+ \5 O: X3 v: J when <constant_list> then
3 h1 q6 ]0 q) f! X6 K7 a <statement sequence2>;1 h/ s0 {' |! x3 M- I: h
...! v3 ~: W+ p' v6 P+ e; {
else
3 b* d6 K. w, J4 l6 h# z/ v <statement sequence3>;
# U- u. N. B& b+ f0 Q4 Hend;
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2循环语句
& i P: N, m# t, x+ _+ f O( H (1) from <statement sequence1>
( O: v5 V' a0 G2 J1 ]- ~ until <condition> loop" P0 D) c9 m5 O' F) ]2 {6 T
<statement sequence2>;0 b6 a8 f# e, A, T
end;0 `% [9 o& h7 s8 h1 |
(2) while <condition> loop# X( d L6 T% P' b. Q$ T3 r
<statement sequence1>;
3 s/ X; u8 T5 G. O& B" w" j- A end;
+ ]" y" P x$ Y* I( h: w (3) repeat / \% [" A; _) _# R+ ]
<statement sequence1>;
; |) @ r' [ s' U% S7 Z until <condition>;
) P' j5 t+ I4 U! H% w+ B) a+ l (4) for <condition> to <condition> loop5 C/ ~! J6 n, R S0 \& d4 l
<statement sequence1>;
4 b) e" l+ _, y next;
/ W$ E& g* p* k3中断语句3 \* v2 i& j" F: ?1 f7 K6 S
waituntil <condition> prio <integer expression>;$ K$ g8 V# c0 C$ r; v# F% [
0 Y8 x1 U* B, m3 @( @. ^
# T& n4 f; G8 {# t8 ]$ [以上为常用的函数!
( o3 ^* u, `* J; n: I' X还有很多,如有需要我把资料发到你邮箱里 - A- w8 Z. ^5 v/ i: e
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