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发表于 2012-11-13 08:48:12
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1判断语句
9 r% z; A+ N" O5 t! K# N if <condition> then
2 r# h3 @4 m# ?8 c: q! a4 } <statement sequence1>; H# ^+ I) E" v; M3 R
elseif <condition> then
' w ~# D5 |% K* L+ c0 |6 Y <statement sequence2>;
* P7 \/ ]! N3 p8 }9 ` else
! N+ N9 g0 S5 X <statement sequence3>;
9 m4 e" T4 L6 N" z end;' a) S" r) w5 ?6 l
如果分支比较多，用：
! c9 F9 n# k/ R; o( V inspect <expression>: M1 o+ I V6 {( V; I1 @
when <constant_list> then
6 M2 ^% a1 y5 w3 A9 v" y <statement sequence1>;* s# `2 P X8 F: Q
when <constant_list> then6 }6 B* e7 i/ ?3 p! ~$ ]
<statement sequence2>;( @3 r2 ]5 x' G
...
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<statement sequence3>;; B# p) [! M/ v5 C+ ~4 g. Z2 B
end;! f9 T9 o1 L" K. B5 j# u
2 y; v) u4 E7 t4 p Z, W2循环语句
( P+ ^) G z2 K6 l (1) from <statement sequence1>& C! ^/ e! c3 ^7 u! R( U$ G
until <condition> loop
/ g: T a0 M9 T' w8 W, G <statement sequence2>;$ `1 m: x! B. \' m
end;* c$ I/ ?9 N" D# b. O' {6 ?
(2) while <condition> loop
0 f+ n+ w2 ~* H) {1 g+ e( }$ f <statement sequence1>;
' F: k: N" ]5 O1 N+ p; X( B) x6 ~ end;) ^ _% C2 v6 e5 v0 O$ B
(3) repeat
6 m: V& _; j2 i0 W; G7 D <statement sequence1>;
/ ^ M. o7 k* g8 b until <condition>;
* [8 \& G; l5 i+ r% j' l0 Q: q (4) for <condition> to <condition> loop# S8 [$ [6 `9 L; w4 t3 q3 j6 d
<statement sequence1>;
6 \, x/ k8 u$ P- P next;
9 s$ H7 z& ?$ H/ ]3中断语句% d0 ^9 e! f/ F' W! W
waituntil <condition> prio <integer expression>;
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$ o1 \* s& M& w( m+ k5 a5 \以上为常用的函数！
, }; W+ u( E) S0 v0 f* t3 |还有很多，如有需要我把资料发到你邮箱里 5 o& Y4 M$ U9 [1 q) N* j; `
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