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发表于 2012-11-13 08:48:12
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1判断语句) ?8 J4 m6 b0 b
if <condition> then0 S) S: l g4 X c
<statement sequence1>;' S; i. |" ^, U# `' h7 @ B% `
elseif <condition> then
; R6 w* V0 Z2 m7 j <statement sequence2>;, f% q% {* A2 C$ A1 _
else 3 P/ p* `, \- J: K/ c
<statement sequence3>;
9 V8 Z3 T) K( ]; D# C/ w, _5 o end;
6 Y* s N3 g' O3 d5 ~8 v' }. |( e' u如果分支比较多，用：
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when <constant_list> then8 C5 R4 X5 ]# ~1 q+ b
<statement sequence1>;
' W+ x$ V# o- _" i3 `: f when <constant_list> then
( }! W! v9 ~# r6 A <statement sequence2>;
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else
$ X; N! X) B! s/ @: j& z <statement sequence3>;, O% ^( s( D7 G% @( y, c0 n
end;$ @- g! R) d$ R4 l# g1 x
' \* c T4 ^& j& O$ E2循环语句
2 `2 k9 B ~! N (1) from <statement sequence1>3 T$ T6 C8 r/ O' J4 b
until <condition> loop* V0 v/ ~% m# y' f
<statement sequence2>;: n% A3 a% [ S" ], |) }
end;
1 i; [! V: L, f% H$ R* L (2) while <condition> loop
2 u5 H" J& i& b+ x9 a2 Z0 { <statement sequence1>;9 G5 t2 J2 s0 i# w7 r Y+ P
end;
1 J# b" J" y# ~ (3) repeat # f, x+ R, T+ T* n2 x! g
<statement sequence1>;4 s8 ?0 t& R& }0 e, f1 n2 \
until <condition>;4 Z, {5 R+ S1 Z
(4) for <condition> to <condition> loop
4 q/ v+ t- ~# x. Z, ^4 U. Q$ i2 k <statement sequence1>;
8 V8 N/ L# o0 ~8 ]3 T) f next;
h9 ?# [6 P7 H6 i5 n, X3中断语句+ }' |3 _* l* H$ y
waituntil <condition> prio <integer expression>;
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以上为常用的函数！
% J. S& Z6 O9 m# P' `! `还有很多，如有需要我把资料发到你邮箱里
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