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J = zeros(100);8 I( g6 P) W8 P* W% P+ l/ }
J(50:59,30:39)=1;/ I2 w* l( t/ O( ^
J(50:59,70:79)=1;7 I$ }3 X7 z/ ~
J(50:59,50:59)=1;) O9 c* j) _7 E5 p8 R! f
J(70:79,40:49)=1;4 r! n5 a. s) y8 o f- e8 U7 V( _
. [ K: A* @1 {2 ]3 T# b) k
[rows, columns] = size(J);9 q3 Z t# i# L" h
count = 0;; X3 z; p% P* z, W9 U0 N
- w8 V* j% ]( t; K9 d* ?% 找到一个值为1的点的坐标! }/ |0 x' ~0 F g& y
[y, x] = find(J==1, 1);
% y! V; n( r& Gwhile ~isempty(y)/ U/ @! t' l5 T+ ~
count = count + 1;
) ~7 g) y/ `" P0 l flag = 1;
1 L7 S8 q8 B3 D* } ns = 1;
5 h& M9 A7 k8 G: ?: C) Y: y( T0 p sy(1) = y;
8 A5 t9 S( N* v- y$ x sx(1) = x;2 y9 q. m" r% H" d/ W
while flag
! T) z7 v& A' r nns = 0;
! d/ H. n- s( V+ Q p/ g# y nsy = [];
9 U7 E* |6 |, {3 h nsx = [];
! c0 V: {' v! ^! J C6 [6 i % 向周围扩散3 b/ {- Z8 A" O, [ C8 }
for i = 1:ns. b/ Y T) [, A, ?
J(sy(i), sx(i)) = 0;3 a; `$ r0 G7 |% F# o3 M
% top
8 x* Z: k. p8 e$ z if sy(i) > 1 && J(sy(i)-1, sx(i))==1/ ~; }/ W! i9 I$ y4 r# @
nns = nns + 1;
4 t/ d# ^$ `0 y, c4 g' `# ~ nsy(nns) = sy(i) - 1;
7 i' i0 G1 y/ c9 h4 z1 Y nsx(nns) = sx(i);
, y8 @+ A" M% S& y end
( J. T6 @; ]4 a7 @6 @ % down
! `$ p4 `2 [, Q- {7 K& o* z, F if sy(i) < rows && J(sy(i)+1, sx(i))==1+ L! W& s$ n) A! R/ J& e
nns = nns + 1;. v! h1 M3 n# L0 G1 h8 O1 ?
nsy(nns) = sy(i) + 1;
; N! r6 F1 w; M% H7 T nsx(nns) = sx(i);2 @! i' {: W( ?
end; B- @# h5 E' z/ p% F3 ]% ~7 U
% left- G+ T2 ~9 }1 j9 e) Y5 z
if sx(i) > 1 && J(sy(i), sx(i)-1)==1
- J1 C( l3 {* _9 i% J8 C nns = nns + 1;4 b7 Q a5 Q, Z) [9 }
nsy(nns) = sy(i);
- @( M9 @, T+ L" B5 c nsx(nns) = sx(i) - 1;# l, \- D8 w& w1 k4 Q L
end8 m9 v" P" n' V
% right: h$ d1 {, U' a. X/ M% q
if sx(i) < columns && J(sy(i), sx(i)+1)==1
7 q6 _8 U2 C+ y" v) ?# C! R( m nns = nns + 1;- x* y9 @ \) V6 n3 i
nsy(nns) = sy(i);
! ^- i2 r) o2 C9 d4 s/ I nsx(nns) = sx(i) + 1;. u2 b/ p& I- i$ `& e/ b
end
% S z' L# j; w8 @+ A5 S2 y2 `7 x end- r9 v N# Q2 |, ]$ C& B6 y0 m, `
, j4 a$ s5 T, q3 F1 }3 I* f
ns = nns;
, Y) k( F5 V( |5 h' Z sy = nsy;& V @3 Z9 ~8 Z6 @# s
sx = nsx;
% T3 Z0 c7 M( _& T% |6 y, j' [4 l. [0 F3 c9 A
if ns == 00 N3 n% Y' I$ J* c6 ]
flag = 0;
7 ~( W" O$ I: r! M* M% y& L5 Y8 R end
7 q/ b1 E9 {4 y( G& W: a9 ?" l) d7 m3 k
end1 j8 {2 v) }. q! y+ F, y* x
8 J4 p, k, ?: v5 j4 m [y, x] = find(J==1, 1);' U" ~! i% L& _
end
( N% x% K6 ]: H4 Y9 x& W! }
# k7 u/ t `7 Ndisp(count);
! W; G0 I' r2 t$ M2 j) [1 O9 l& H* n- A& @+ T0 V
# s5 ]0 H; U" Y. q" v0 R
: R! R1 T% A) b试一下行不行啊3 B: {/ f. i* s
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