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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
# |- ~" t" H8 @' @& }) L if <condition> then& C: ]% H# B& A' E/ J) w' i
<statement sequence1>;
3 a1 M& x& M9 V$ e2 Q/ B4 X: \ elseif <condition> then
3 D1 A* ~, ]" r4 U' @+ }/ d) } <statement sequence2>;# J" K3 t5 ?4 B4 c# M: d; V5 R6 @( f
else 2 S" N( G1 h" V! M7 p( N- C
<statement sequence3>;$ z; E$ J0 o2 k$ ]
end;# Y, E/ s$ i; U; j
如果分支比较多，用：
& P' r# f B& u4 }, [ inspect <expression>9 b+ ?( B0 h; A$ y3 ^4 `
when <constant_list> then6 N! t p. r) z$ |
<statement sequence1>;
( b( `; P; P; W when <constant_list> then
8 a( j, C" I6 i* z4 H% ? <statement sequence2>;7 x* V3 T/ ?4 |: @
...2 q, o [2 _+ `0 f. g- {
else$ C: Z7 S" O6 Q, c5 l! A; U
<statement sequence3>;
/ ?' ?7 U, [1 q* e1 N: g# O6 p4 P. Lend;9 k: ]- V( h1 J: R' p6 O
& c' M1 k% q+ s; F/ k$ L2循环语句
! b) _/ q5 Y& }# j2 u2 ?8 r' Y5 n (1) from <statement sequence1>
5 z' h% u3 L5 E. R8 x: u* E* N until <condition> loop. O* w2 [8 p( E/ J, o" w5 j
<statement sequence2>;
# E/ p% B5 ~( k# E9 D4 K/ } end;
' O3 u8 |' G1 a" u! F( X0 A (2) while <condition> loop
) W. j8 u, h8 }" ` <statement sequence1>;1 h: H9 P& |* O/ B" r5 ~5 d: A
end;
' _1 v3 d) d) E q R+ X% j (3) repeat
8 W3 ^1 F+ X! U2 [ <statement sequence1>; @8 }( H/ G+ g. G! K9 y: z: Q
until <condition>;0 t# E% H+ U# I4 C. z. [7 k
(4) for <condition> to <condition> loop
( v8 o+ u- f( F% Z+ [: p <statement sequence1>;
) o, {, s7 q7 \- D! y next;& b9 S% R$ L8 W/ b" ?8 H
3中断语句
& K- J+ n5 a0 q9 e7 T waituntil <condition> prio <integer expression>;
& P+ A9 k+ v9 C% r3 a6 @% l( D% G4 G0 M& q9 q
) `3 Y8 d! {7 T
以上为常用的函数！
6 _" v# j' y: J3 c/ j- e还有很多，如有需要我把资料发到你邮箱里 ' f+ v3 C& I @
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