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发表于 2012-11-13 08:48:12
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1判断语句
& s! I4 o: g3 k if <condition> then0 R* I, r( V$ X$ B) i) K
<statement sequence1>; o' `* `; k) {0 B( V3 V* T& M% T
elseif <condition> then
: C* I: m$ _" Y& S3 F <statement sequence2>;
+ X9 S( ^3 j8 Z+ @0 a, c* \ else 6 J6 m; B- d7 t5 f( u f- R4 v
<statement sequence3>;
8 r9 g3 r. T+ {. D! c# h end;" F% ^9 u: L9 ]+ [* @# H
如果分支比较多，用：
+ _; W6 @8 r2 v, r2 `5 D; G* b inspect <expression>4 n, J* J$ \; Z& w- C6 n4 S7 {
when <constant_list> then2 i0 j9 Y, \. B4 p$ T
<statement sequence1>;9 ]& V% [* A3 G" W
when <constant_list> then
1 I' ~. s& R- |: k <statement sequence2>;
C7 u& }. Y! t: Z, T5 w0 k ...
9 |9 E) ]5 T) R2 l8 |) U5 } else7 W9 G0 t' U7 x; l
<statement sequence3>;
: ~6 k8 y+ V) x( \: y8 [+ [end;
# N+ W- V7 R) Q! a
7 T+ s9 Y! d7 m! q# \2循环语句; j" Z4 j+ K1 J1 c" s) n: a- m$ ]
(1) from <statement sequence1>+ `3 N, v. J, c
until <condition> loop
+ A, c- G2 {* A+ r! P; d- m1 b% | <statement sequence2>;) b1 ~0 { L# r2 ~
end;, p8 C& P5 y% r, z4 C; i$ X2 F
(2) while <condition> loop# P+ L: [' e: t& @
<statement sequence1>;
0 c; a* {/ d% z& {5 \" |* o2 v end;
* P- U# a1 ~* a! B (3) repeat * u6 G# ], k0 ^. w1 V, _; ^6 ^8 L
<statement sequence1>;
' J! i' b/ ]9 m% I until <condition>;
4 u6 ?8 B9 S9 P: s; T+ [" Y (4) for <condition> to <condition> loop
: Z% v1 r/ {, Q% S; k: S# d0 S <statement sequence1>;
$ r- i2 r- g" T" \: c next;
" m0 B/ a0 W% m6 @; o& X3中断语句, v6 ]6 B/ c$ B! \' J" S1 C
waituntil <condition> prio <integer expression>;
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以上为常用的函数！. _' m& h& ~- |! Z% u
还有很多，如有需要我把资料发到你邮箱里 % R1 b0 c7 _ }# a2 T. J
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