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发表于 2012-11-13 08:48:12
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1判断语句
, `, v7 U! u/ O2 A if <condition> then" t$ J7 ~0 e, W* B. U1 X
<statement sequence1>;
; L* w D* T3 V elseif <condition> then+ ?8 O. _1 Z0 Q* m- T& v+ O
<statement sequence2>;( }1 |3 r' A% @/ h8 H
else 4 R" C0 ]& z% e9 n! @- u& _3 J
<statement sequence3>; i+ ^9 X- v, B6 Y s
end;
+ ^4 X5 C1 p' J6 b如果分支比较多，用：+ S6 I8 s; O' T G& e: I4 U
inspect <expression>" U9 b3 [+ O! I; E V$ X9 W+ J
when <constant_list> then
% @: [" W- d' k5 g/ c <statement sequence1>;
- T" N4 \# y! u8 S; w% ]5 S when <constant_list> then9 ~1 B2 g! V" [, D; N
<statement sequence2>;( C5 L+ H$ ?) S% i* D
...6 ] r8 @* U+ C" u' ?
else
' Z: u/ p l; I' B6 Z0 K2 U4 l2 I <statement sequence3>;( W* K7 S% [+ `! n- c1 g, V- u
end;; ^6 T3 ?) W& m1 `0 U% C
6 a+ c6 F2 z* C f+ C+ n; Y2循环语句
2 |6 W2 P" O% w5 j( q! H (1) from <statement sequence1>; q$ ~+ F% J7 d% O$ [
until <condition> loop
& \2 z: b2 L+ h/ N# A' [5 a <statement sequence2>; }+ x- \6 b& k; F" j! _
end;
, `' q0 W* x5 Y" w Y (2) while <condition> loop
0 F9 b- z( p% S: o6 u <statement sequence1>;+ M! V1 a7 m# D: W
end;
& V$ q2 W4 {# ?" v+ P' t (3) repeat 1 Z) o. [: O$ T# F4 W) k
<statement sequence1>;8 f5 P' a" k, o k8 U. w* b; E o6 \$ O
until <condition>;
: n9 r- R& p2 h+ i0 u (4) for <condition> to <condition> loop( ~7 Z0 m! J: n" }! B; s
<statement sequence1>;. d; T7 R! L' V
next;
2 }5 l! }: t% O0 ^5 C* H% s$ U' ~! X& A3中断语句
# D. v$ j" W5 ^1 u waituntil <condition> prio <integer expression>;
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5 X( Q7 ~" {2 l6 f. T! E* p以上为常用的函数！8 |( [' o, w: p# \6 z
还有很多，如有需要我把资料发到你邮箱里 - ~2 A8 b2 v: b7 ]! E) Y' T- h+ i
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