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发表于 2012-11-13 08:48:12
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1判断语句/ v/ n4 ?: E) G }- `
if <condition> then6 T0 \$ l3 T* j% | c: ?; w( l6 p
<statement sequence1>;# d. r; m+ e, h: a6 |) F
elseif <condition> then
" @+ g' ?& S) r) }+ b" C <statement sequence2>;6 T1 D+ f" b) l8 t$ t6 A
else
+ B; i: m+ I8 y, |9 e <statement sequence3>;
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如果分支比较多，用：
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when <constant_list> then
l- h2 k+ H Y( ~, p <statement sequence1>;: u6 \6 S3 W8 I' g* \( _
when <constant_list> then
5 M( ~' Q& \1 N- C% T: f/ y <statement sequence2>;. K5 q- O% F& E. n, [3 C6 a
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else
2 P* z3 f, ]6 t& l+ a" k6 ?7 J <statement sequence3>;
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2循环语句
' ]- \" H% z# t3 x (1) from <statement sequence1>0 ~) P$ W, x: T, S+ O
until <condition> loop
6 {; u1 L, S/ U! Z3 o <statement sequence2>;
. I% ]# ~ ^, E& f6 Z1 g8 ? end;
: L9 ?5 E! n0 W M ?. R0 v! C/ L; O (2) while <condition> loop% P$ {# H7 \$ J% k/ J2 W0 c h4 Y5 E
<statement sequence1>;
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(3) repeat
7 s9 M* _" U. F% N <statement sequence1>;1 T" N8 w& C! U, v6 J
until <condition>;" X X7 a1 f5 R" X8 v. }
(4) for <condition> to <condition> loop% Y2 F" D3 Z9 |6 W, p- z7 H) ]# N
<statement sequence1>;
5 |7 g: w7 Q4 _ next;! I$ e( H: j% ]* S8 h( f) R
3中断语句
+ Y1 r- ]- o K waituntil <condition> prio <integer expression>;
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以上为常用的函数！* n* d6 ^( m ~- I# m S5 V
还有很多，如有需要我把资料发到你邮箱里 / k0 }* g7 n2 l5 L' }9 E/ b! W: C. Q
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