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发表于 2012-11-13 08:48:12
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1判断语句* W! P' Q {( V8 k \ m5 P4 [
if <condition> then) Y2 o5 D' H* q ?* k2 J
<statement sequence1>;
/ k$ S7 @8 R* K# P1 n0 g' {! C elseif <condition> then
2 V& Q; v& q3 r <statement sequence2>;4 h' P. h$ A5 ^3 i1 |7 f- V
else , u3 W, O. t) a: w9 u
<statement sequence3>;
9 |, s" v" [# ~; E1 u end;
8 x) N, }0 d# s0 W1 I4 L3 z! [* s( S如果分支比较多，用：
r Z* f5 I$ E inspect <expression>
6 g9 P& C; B" o8 O6 d3 y when <constant_list> then
1 i" h& b2 k! \0 X, e, ` <statement sequence1>;! A7 E3 @$ o4 P' i; L+ Z, T
when <constant_list> then/ Z _- Z1 x5 W
<statement sequence2>;0 ^. i7 s) n( K+ _. {) S9 n/ y
...
1 A8 W w( Y, ~2 A1 x" G else
+ T% H3 ^3 ] W/ x6 b* a } <statement sequence3>;' w( q" F' \% Z; g& _
end;9 e# _: I, y& ~) `; g/ ^
3 {, x: s3 b, e/ S+ o( s% P2循环语句
S9 C& A" e3 [+ d, Z( p (1) from <statement sequence1>2 m( j0 m2 S4 Z, L3 w; u) j
until <condition> loop# P! x$ `& y) R, K$ E8 x
<statement sequence2>;( b$ T, N/ @( Q/ P( R
end;! j- d5 _; O) h/ {
(2) while <condition> loop9 R% l/ V( H5 Q+ d, W: k! W H
<statement sequence1>;; d" |% n& a7 G
end;0 a, x; q( L6 o6 e7 j) r
(3) repeat , f: x. @2 ?2 Q7 \4 L( @
<statement sequence1>;
+ O! x4 v2 ^: S; k1 a until <condition>;
4 h% b% F2 t& O$ x% A1 J, q (4) for <condition> to <condition> loop
" w% D5 c6 R4 p6 Y5 | <statement sequence1>;
4 _" V3 f3 H3 L, p# H0 @+ D next;2 C1 L% ^! @" n: X
3中断语句
0 W/ Y& ^$ W& O' Z# G waituntil <condition> prio <integer expression>; S1 l' e/ ^3 u, \+ C' u( C
9 ~* V( m* P/ H( }4 M7 p/ y( {" t0 O
以上为常用的函数！
8 Y' N$ s7 B1 l! I还有很多，如有需要我把资料发到你邮箱里
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