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发表于 2012-11-13 08:48:12
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1判断语句
; k I" p- _3 H" U if <condition> then B9 M) p2 ^1 o% w8 ]- r
<statement sequence1>;
' ]6 @5 p3 A% { elseif <condition> then8 a4 P6 \: }% p3 @$ U. N3 U2 W; B
<statement sequence2>;
) {2 A' @6 F1 j# V( Y' B; _ else
5 d* w5 n* U, z) C <statement sequence3>;
% t0 g# k6 I( w$ r end;
- V0 e: n, V1 n4 }如果分支比较多，用：
i, N8 W" K1 i/ n* `! x inspect <expression>
, T4 R- ]: ]) Y2 t2 b9 |0 m9 S0 O when <constant_list> then
3 U) H3 G$ ~$ X2 q2 d <statement sequence1>;
, z" W; P- |8 i& {. `' e/ r0 w# t( D$ u when <constant_list> then8 V- S5 [# X% n7 T* G( Z& m
<statement sequence2>;0 q, ]; E6 ^. J1 F
...( p0 ~* F% ?' F4 |: U1 _
else
0 W) U& X/ m" c- b0 I$ M/ ]7 V6 i2 y <statement sequence3>;/ q `) h- h$ e
end;4 w$ z1 _. q+ N s+ i
3 Z' v+ |: \: s* ^- ?) S4 v2循环语句
% T( _) K, c" g9 N, U1 J# Q (1) from <statement sequence1>* t; j i3 n" U! ?% |
until <condition> loop
5 w7 u1 w; L+ A8 q <statement sequence2>;
6 H9 u4 Z2 E7 {& D2 h) L end;& T9 F* `$ i2 a
(2) while <condition> loop
5 D$ e' O1 ]& m <statement sequence1>;* Q0 d1 r: c6 n) S9 o* Y
end;
( o0 c, I( K1 n8 @ d7 K (3) repeat 3 E* e( G7 D# g5 y, U! Q
<statement sequence1>;7 K5 q; v- x6 a- }; w
until <condition>;
$ [( U* j4 @- @5 o$ Q' f (4) for <condition> to <condition> loop
! d' K6 p8 V% J <statement sequence1>;; @+ B: ?$ z" j/ N% h
next;
. ~% k) H, a3 u6 N$ M9 ?3中断语句7 I7 \9 I/ \6 U/ N; V
waituntil <condition> prio <integer expression>;
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以上为常用的函数！& j6 D3 Y ]! M9 }8 ]
还有很多，如有需要我把资料发到你邮箱里 * E6 ~& A% ^ _, L/ h. |
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