我编的程序如下turtles-own [energy]
W: B3 y+ E. L8 Rto setup2 N/ j. F+ p, H2 Z
clear-all
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create-turtles 100
# u2 R" b0 ^. S: G do-plots
: ], U6 b8 k) L: Z3 {* U ask turtles [ setxy random-xcor random-ycor ]! j6 [% z# H4 V& N2 ]2 |
end
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move-turtles
: \) ^ p7 i* j eat-grass
t6 J9 @3 L. L! n4 e reproduce
' D7 m& O! k+ y' Q check-death: j" i6 x& ~- Z8 e. L
regrow-grass4 `; f% L) U3 o6 `2 k, S! a# o6 B) V7 Q
do-plots# {/ ]/ C2 q0 T3 \0 d' S- e+ l
end3 b4 }' I5 M: \* N; F, q
to move-turtles z5 ]" U3 X0 a; M3 L7 H2 M
ask turtles [2 O4 Q3 F4 K! }7 ~+ Y
right random 360& |* z2 [, e( h/ t( A
forward 1
; l& p* D4 g4 O9 ~ set energy energy - 1
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end7 @' q0 p' L; o( Q6 U, A
to setup-patches$ {1 L a1 h( k* h, V+ O: e6 F
ask patches [ set pcolor green ]
( c8 ^% o' C Y Uend6 |" b" B; e3 s) u* r
to setup-turtles
" _7 f6 A' s. ^$ Q; u create-turtles 100- o8 L7 W/ l2 `
ask turtles [ setxy random-xcor random-ycor ]6 w' u' ?" ~0 M9 p
end% T' H+ J3 a5 S4 p. t3 ~' F! n
to eat-grass
% f9 L3 e+ A2 o ask turtles [# U$ n, ^. Z6 X r, c
if pcolor = green [
% s1 p( b- a8 x2 X9 i set pcolor black7 J7 L* T% }7 K8 o4 J
set energy (energy + 10)- V( K) V9 m& P# T5 l2 H c/ N) F
]
* D6 v( z$ @* Z' ]) V2 x3 y% y ifelse show-energy?
* W, r P( z# b2 l4 @# N [ set label energy ]: V/ A& W% P( P8 B# o
[ set label "" ]
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end
$ ^+ k/ K! y2 I- G, u6 uto reproduce- g+ |) p) v/ B* ?2 L3 K
ask turtles [2 c* s' ~( r' N" e6 Z
if energy > 50 [
4 ~+ y4 `6 y) Q( x; M# _7 c set energy energy - 507 Z O s. c( {8 c5 r* I# G. @
hatch 1 [ set energy 50 ]8 u' O4 Y& M r$ S5 u6 j8 B$ I
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]
6 Y' d. q O) p5 D E* Q6 dend
8 M9 P* L+ ?; t2 p( u- gto check-death
) k1 P$ l/ k+ \5 _7 {) A' d0 X# n ask turtles [
! i$ y& `) }) M* h% ^- \ if energy <= 0 [ die ]
7 E4 r1 v" l" Q ^ ]
: e B& u3 w, f9 gend
N4 G" M) ~0 } ^6 @7 w. p3 @to regrow-grass
! r* ?" J- Z1 v7 r. s/ I" H4 o& u- w+ k ask patches [
! G7 a8 R# D; @3 i. T/ Y if random 100 < 3 [ set pcolor green ]
, C- |1 Y, P; z+ w }6 l ]
2 ~& b' n% m8 L! aend
0 C' V& q5 D x3 T3 Q jto do-plots# S8 |! W1 T( d
set-current-plot "Totals"' G0 j) S* d0 O) L+ d
set-current-plot-pen "turtles"
( h/ h/ U3 d( u plot count turtles' } u2 Q0 X% |: t
set-current-plot-pen "grass"& I) R! q2 e2 a' w% R8 ?
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"& F8 s5 p9 p# ?
error while observer running SET-CURRENT-PLOT
* D: G F0 b9 i: P& m. _$ j called by procedure DO-PLOTS3 a' N/ o+ M+ s! C, i' |7 }
called by procedure SETUP
4 v8 `$ I0 ^$ ?( s$ l5 ? called by 按钮 'setup'
2 @& m' R3 g9 _6 T求大神解答啊 |