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发表于 2012-11-13 08:48:12
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1判断语句
5 T! {5 O, }# y% _! L$ u1 e4 ?6 @8 I if <condition> then0 H i1 w* k, J* W. V8 ]4 a: y* z+ D
<statement sequence1>;
% I( z) B, Q! Y7 p) t! \/ O; s9 J elseif <condition> then T7 c% C& [0 E; g
<statement sequence2>;! r- w/ x2 ^& n6 g" e, }
else
! M. [# {7 I- y* I <statement sequence3>;
7 G; W1 j% E. ]5 V2 j end;
9 L% k* `$ v/ h2 x [' y如果分支比较多，用：
! [/ |9 e- `1 m0 O' T inspect <expression>
' ~0 \8 c6 V9 O( {& k1 k. T$ I when <constant_list> then
2 ^6 X" M2 Z4 s. y$ u <statement sequence1>;
7 Z& T0 k4 q$ u, t7 u& g, d- ] when <constant_list> then
k% |9 {0 h9 { <statement sequence2>;
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else
% ]4 q& s' q0 I. y3 j/ G3 t& e <statement sequence3>;: Y* T6 n8 a' v8 Q! ]; C3 Y& b
end;
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2循环语句6 N$ L' {' A7 E. O. v1 p- n
(1) from <statement sequence1>
& t+ L) F, ]8 m) y( W7 M until <condition> loop
O; X& i- Y* V0 n+ k2 R <statement sequence2>;
; e. i6 ]7 K3 T3 Q end;
% r: Y# v0 L; N0 A0 j3 z/ p/ y (2) while <condition> loop
2 D6 X i/ x! U <statement sequence1>;& L% d' u+ [ C: p; y
end;+ R& u Q$ k( F! }
(3) repeat 5 I7 S+ u, w' w( v" X
<statement sequence1>;5 _& Z P# d/ T$ D; _
until <condition>;
8 p0 \9 N+ @# `' L" d (4) for <condition> to <condition> loop2 w% S$ k7 ^& g0 I) M
<statement sequence1>;& R8 v& W6 F- l$ O
next;
) Z$ C3 G( R# R/ m3中断语句+ U: O: A- b7 h- W9 u
waituntil <condition> prio <integer expression>;
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$ y5 r9 M, l0 t& Y% |5 Y2 c以上为常用的函数！
. ~: i, T/ F: E+ ]还有很多，如有需要我把资料发到你邮箱里 , F; O2 c# ~( V. N! G( k5 c
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