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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
! x( R, _# `% y' g) Y if <condition> then* `1 f, e, c/ b- Z
<statement sequence1>;
) [ G( z5 ~& w. T+ [2 y elseif <condition> then
Q- M" ~' B7 L+ N <statement sequence2>;
! d2 b9 X3 k0 R: \ else
, Z4 o0 ]3 B" i <statement sequence3>;5 W k: ]" w: m; k8 Q
end;$ E, P; z3 b6 S4 t; i
如果分支比较多,用:
# A2 l& K9 }* Q, H% r4 ]" b) F inspect <expression>
" s, W" x4 v4 G$ \2 O; C3 z when <constant_list> then
3 A8 E8 _& @& t <statement sequence1>;
' u$ P1 p* G- \, U" K+ A( j& G when <constant_list> then
5 U' z& [, S6 j0 G7 ]/ G <statement sequence2>;
& O0 U" \3 }0 {3 w& w ...
+ @" O( E# C. B" s# m E else! e4 ~* u5 J2 g5 _0 q9 C' o" S+ V$ `) |
<statement sequence3>;
( C3 @3 W' P* z: E5 X9 M2 iend;. I# g" a# n! i9 e& h' J: u4 Q3 _0 S
9 a) ~$ F. d, S6 ^2循环语句
+ y/ u3 P' A5 G (1) from <statement sequence1>
7 h% E2 T9 d3 o% A. F: ] until <condition> loop, S; i. Z4 \; v' A& I4 j
<statement sequence2>;( k0 q# ~; N( r. k! n9 {
end;
5 @) p( @$ A) [, t1 k* \$ a7 i9 m (2) while <condition> loop% m! F0 z: D, q# P+ J9 O) a" c0 F
<statement sequence1>;
/ \* K- i. p/ D v end;
& q A0 T7 i1 a' R0 n (3) repeat 4 m, y" y. A6 a
<statement sequence1>;
. `2 _7 E0 m- E, }4 D; M- V until <condition>;% m1 `# K( F3 I, c7 t, e2 R. Q
(4) for <condition> to <condition> loop
' Y4 a6 U9 W' h' c w6 |+ t1 C4 b <statement sequence1>;$ I8 B3 X" t' y$ V; Q+ `
next;. w2 u0 y! o9 B. z5 W! D% v
3中断语句
7 l& Q) [2 G1 e* k0 L% q( a waituntil <condition> prio <integer expression>;, s T2 \, y3 Z
6 t) y/ I2 Q9 j$ q4 x' Z7 N; h
# X2 G1 \# j$ o- L) p以上为常用的函数!' P) L+ k1 F7 Q9 `' @6 r; ~2 }. @
还有很多,如有需要我把资料发到你邮箱里
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