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发表于 2012-11-13 08:48:12
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显示全部楼层
1判断语句
3 _) _! B3 u# k0 ] e if <condition> then
3 e3 Q8 n6 A) e4 `/ E- y <statement sequence1>;
1 X' u: f0 C6 i; E( a# S elseif <condition> then4 \" {; t5 \( A( K
<statement sequence2>;1 O4 [$ c* H7 K" L6 g
else
9 T, Y: u; S- j* ?* e! U% ] <statement sequence3>;
1 p5 c7 B/ q9 y6 ?& z6 A7 k. X% z end;
1 H6 m" g, v- B& m如果分支比较多，用：
( c# ^0 i, D' l x9 ] inspect <expression>
6 H1 s+ R9 i: y3 l when <constant_list> then
: \/ c( z4 `4 P2 u" h" w <statement sequence1>;
5 f0 J2 ~" P' A5 G+ k when <constant_list> then
# E/ D5 H. r4 W, H <statement sequence2>;
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else% u) F& p3 o% h- `; W( a, }
<statement sequence3>;3 X6 q$ |" A6 D5 S/ _0 z6 N
end;9 e2 I% z- I% s0 ~7 m
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2循环语句, {0 Q/ A6 I8 _( V: Z2 S0 S9 \$ I" v
(1) from <statement sequence1>% H% p7 Y3 h2 d, r8 d1 k1 k
until <condition> loop
1 K6 E! c G) Z% x/ R% [& z! C <statement sequence2>;) s+ V' x ]' B5 Z6 q6 B1 n& A/ z
end;: `1 r9 u& |- e' e& X- l$ K
(2) while <condition> loop5 M) h8 P9 m) \3 ^
<statement sequence1>;
. C2 f" I" @; ]: O& N, |5 j end;5 [4 F7 `+ k1 n7 S
(3) repeat - D3 @: [0 e- i {
<statement sequence1>;
! C& H4 M8 f8 i) i5 u4 H v9 r until <condition>;& c( ]7 c8 l% |7 n. ^( R* [
(4) for <condition> to <condition> loop4 P, J8 d9 @; L& Z+ E
<statement sequence1>;
8 I" G' M( ^" \ next;4 m" F( `9 L' n e
3中断语句
6 l, U6 {8 q( h. y7 n( N waituntil <condition> prio <integer expression>;* d0 i( ?2 J* A: c1 H$ |2 ]2 v
2 H* ~4 o/ }* }# c9 ?2 N4 U
8 z" C9 M4 w% x* `4 a2 X6 B9 K以上为常用的函数！9 H9 n. ]& X' A y& I
还有很多，如有需要我把资料发到你邮箱里 7 w% ?# A% G2 o+ E& R
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