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发表于 2012-11-13 08:48:12
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1判断语句; I: F; P" _6 T) z
if <condition> then4 c: ^/ f# Z( J, ~9 F# |4 m" g* x, P, {+ K2 E
<statement sequence1>;
! {/ a& H4 N$ l P elseif <condition> then
" P6 P: P5 m# W$ v* x <statement sequence2>;
) e" f6 o8 r! R, L else
. _. p: n0 S8 W3 A* }! _ <statement sequence3>;
8 a8 i2 X9 u+ _/ `) j4 c end;
. e4 }$ W) x* J& O! {如果分支比较多，用：
! U, W) X% |$ n8 v1 r( J" Y, m$ S inspect <expression>
$ M5 L( S0 P! Z. |9 i6 r$ Z when <constant_list> then
2 J2 O+ \; U) u) e9 W# r <statement sequence1>;/ N+ F+ J q# ]4 u- V
when <constant_list> then
0 U0 {2 O1 \8 q <statement sequence2>;
" p8 Z+ s! g. ]) e' j ...
6 B8 A) X" y. [8 S else
; L' _1 n) a. C9 }# } l <statement sequence3>;, `: Z/ i# w4 u+ ^& B
end;$ j9 o0 t: s4 H. V( B6 _$ u
" P. O$ r* m- x R. P/ H3 {* l$ N2循环语句
4 l# Q0 H7 q$ [! N$ y/ K (1) from <statement sequence1>6 U1 q- ^3 v6 z
until <condition> loop
) {+ y: X4 Y c <statement sequence2>;
' X+ N; r/ r7 a6 ?0 \ end;3 o% K0 G, J/ _
(2) while <condition> loop7 m, d& _8 \) } _, c% K
<statement sequence1>;
: r$ y& b( F! f S+ @) Y7 w" e5 l end;
1 L5 @+ B+ K, i8 |) v* a0 M0 u8 Z: a (3) repeat
& U& A- i7 Y9 p( m" a% Y <statement sequence1>;
( O6 c2 W. k1 o# W' y1 S' [6 r- @ until <condition>;
* K$ A; p' ~. L3 N' H9 C5 o (4) for <condition> to <condition> loop9 L q- L& F, k' q2 e7 L
<statement sequence1>;
! k# O* g3 x2 Q/ Q0 ~5 Y' U next;
5 N# s$ N6 D6 j) d! j$ {3中断语句
& F, O2 K$ ?1 {4 l0 E9 n% ^ waituntil <condition> prio <integer expression>;7 o+ m) J4 ?( m% O+ c! A8 ^
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7 b4 [. o9 |4 \, v& k# W. B以上为常用的函数！2 L% S) R5 C# a# F! b6 J
还有很多，如有需要我把资料发到你邮箱里 6 Q/ |* c( f7 z( l! g- Y/ h/ K
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