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发表于 2012-11-13 08:48:12
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1判断语句3 T1 Y/ K! h" |2 e5 E6 B; Q
if <condition> then! e# l! s4 }6 Q5 p5 R# Q! q$ G
<statement sequence1>;+ Z7 B: n4 ` R) g4 D4 E! Q" A
elseif <condition> then
9 | G& Q) N/ V1 } <statement sequence2>;4 }6 u! a! p; ?
else
! g% z* p; l1 Z <statement sequence3>;
9 w8 Y( {; ?5 M: o end;
3 n3 ~0 D% Y8 ~0 @$ Z如果分支比较多,用:/ @4 W- j1 l X& u
inspect <expression>
, E# y u' V( i2 ~7 s% V when <constant_list> then" K: Y; }0 [4 f M3 ?4 C) S( ^, j
<statement sequence1>;, W8 `; j j( X' @) x! j" Q+ k
when <constant_list> then
: f( H2 k& w: _ <statement sequence2>;; i; g; _9 l; i
...
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<statement sequence3>;
0 g0 y5 Z2 D9 w. r+ a6 |end;
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$ z9 v0 W o% o/ {0 M1 }2循环语句
. F: S1 I, d. J& r7 k0 U (1) from <statement sequence1>2 G* M, Z" t& ^% C) t
until <condition> loop
' K) g7 O7 I) j/ D3 c( F% U <statement sequence2>;2 z7 m1 D: @: n1 R
end;
& T3 A8 \7 h4 h5 F (2) while <condition> loop
# v# f& ~+ a" S! U' x1 s/ c: E9 y5 d <statement sequence1>;
; R/ b8 k: s, j2 c6 L! { z! F6 V/ Z end;
1 Z, y v: d, v0 h7 b. d$ Z* u (3) repeat % c4 \1 H! j- I: E6 L4 y' O
<statement sequence1>;. X3 }8 K+ z: l) T6 v% ?# ]
until <condition>;
$ H! F. \. ?- y( F3 R# T- K, f2 E (4) for <condition> to <condition> loop
/ x7 B) z$ Q/ m4 i7 P <statement sequence1>;
$ r/ V% s5 }3 } next;! M4 h% l/ U X8 I2 X5 B4 C
3中断语句
0 I8 N6 e/ I, c; q, N7 d waituntil <condition> prio <integer expression>;) O. H* G- `8 T T: \
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以上为常用的函数!
6 k) u6 i$ b/ X- N* U还有很多,如有需要我把资料发到你邮箱里 ( C% I5 G o! P5 q0 j
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