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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
4 Z# d0 K, x* E( w- G0 h# O if <condition> then
% M7 Z- J$ \% D+ @3 ^5 J <statement sequence1>;
) \5 j( }; ^: C9 O, k1 i2 D3 J6 T elseif <condition> then/ c+ Y" M& {; E/ s* ~7 v8 P* h
<statement sequence2>;4 Z4 n _5 {/ W6 A! B
else $ J/ t! }: ~0 t; u* g) _' E
<statement sequence3>;
/ N" y/ m5 _- o end;
' [7 f+ V: `2 F# L9 {' O如果分支比较多，用：
7 J8 o$ x: s3 d& f2 {3 ^2 o9 I, k inspect <expression>
6 T+ H% {3 B" k+ L6 w2 J when <constant_list> then2 M9 i$ A- J+ B5 U" o! i7 T
<statement sequence1>;
6 U0 F, d! {' [3 _; Z" v0 @ when <constant_list> then
! q8 V( [7 Z3 T2 p* d) w2 o <statement sequence2>;. C7 r2 s L, T: M; ]1 z) ?
...
! r8 g E' ]7 |4 S" D* ]3 w% ] else
+ m4 U+ y5 e+ o: S: K% z1 k <statement sequence3>;
l; }/ k- R6 \. mend;0 n& l! ?0 y f0 ]+ r6 P2 ?
9 f' E1 i% i E, J% E& O2循环语句- T8 i3 f# B- e5 j: T
(1) from <statement sequence1>( k0 Z2 I; D( U/ i
until <condition> loop& F! F: m. y0 i
<statement sequence2>;6 E6 i9 z$ P) C- L; `7 w) {/ P5 H
end; V( l$ j0 O3 W
(2) while <condition> loop
9 N: t, g& V2 L' v* \& [( T: r <statement sequence1>;
7 }; N4 c5 m2 Z4 g' I: \( O7 f9 ^ end;3 e# |6 }* l( |: o; O# ]1 i
(3) repeat
; V% d$ e0 g# K* Y) M% t <statement sequence1>;
- {% h ?' q- J l' I until <condition>;' P. u, }- e& \4 |% Y1 {
(4) for <condition> to <condition> loop
0 X1 X8 r9 Z* m9 T' F <statement sequence1>;5 k' c! l' t* J9 |
next;
) \9 ?7 c" b ]3中断语句
2 v4 e. x# s$ D8 F3 n7 H' b waituntil <condition> prio <integer expression>;+ Q4 s E* e: D( M
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1 X0 E( g \8 R+ j* r- v- ?
以上为常用的函数！# u1 ?& N7 R2 i( ]1 }
还有很多，如有需要我把资料发到你邮箱里
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