我编的程序如下turtles-own [energy]$ K! p, v; h) e
to setup. V, \& q0 E; z2 G
clear-all
- E* J/ Q8 U. {6 ]$ u. I6 N! _* g setup-patches
+ o( G, E8 ~3 u' T) k* m: v create-turtles 100
' J2 e0 T6 E4 U2 l8 c' {* E do-plots0 |5 V+ W9 V; g# D
ask turtles [ setxy random-xcor random-ycor ]3 F* g- S i2 p
end
& W+ B* U' x# ~& N8 g `to go
1 s- G$ m3 k( L: [ move-turtles
* I6 X: N/ B8 q1 l+ o, L& g/ G, @ eat-grass
: |; F& W; ]1 m' }! D( z reproduce) p; a$ `8 q. o* t
check-death% h. W8 e; h: y
regrow-grass
. `# `, l8 i1 I2 a+ l do-plots8 I8 X# H- Z/ i& m9 T1 ?& v" ?. H
end
5 T# t$ h$ _' J2 l! E9 o; sto move-turtles3 q* _2 ~% Z' v) L+ j
ask turtles [
: v6 K. l- o; s5 ^ right random 3601 o% U% `* _) w. i9 o' D. C/ d: h
forward 1
+ A5 f5 |' z$ M set energy energy - 1- c8 @- G1 o, [) e1 Q6 v6 f/ N
]! M. A3 |4 @' `2 Y# ]
end4 h- S. @) ]9 @, n( W3 g% y# @+ K/ \) }1 o# L
to setup-patches
2 Z6 z1 ?# c( P ask patches [ set pcolor green ]( a, q: t9 E) \% d* P8 f
end/ @$ B( \. p3 o% ^) T
to setup-turtles
( {, Y: c3 ~9 P i/ H2 u$ m7 w, @" [0 O create-turtles 100
; w' Y1 n* ~* P; e ask turtles [ setxy random-xcor random-ycor ]
+ u( f3 u, M a iend+ R, g. a7 ]& K* I) I% Z% L% N
to eat-grass, I! k5 P: f4 T# ?; v; l! L
ask turtles [5 [ O+ f' M# G
if pcolor = green [8 C( o* H2 t, l% a, l& x. A g
set pcolor black( {9 s+ O" f1 V" R
set energy (energy + 10)4 g+ }( G) P0 p: E4 S4 [/ d
] Q& h/ }' ~* ^& o7 \
ifelse show-energy?) ~- S& E% G) z' z
[ set label energy ]
9 Z1 S2 }" A" ?" U0 u0 ? [ set label "" ]/ q! \5 c4 {3 R: Y' n
]
: y3 {* j8 v8 k/ |end2 Y$ _8 Y1 F/ f- }! B. |
to reproduce/ |5 O) X8 Z' d3 o* V
ask turtles [, z7 T* Q8 t6 q3 j4 b
if energy > 50 [
7 t( `& C/ b/ }/ ?# E) w9 D9 e% z set energy energy - 50% U/ j- @ b8 f1 a. m) ~; D
hatch 1 [ set energy 50 ]" ]$ q' ^* B) B
]
c/ W: [+ F% f/ B: T/ | ]% N. O# b* C) \; {
end* E# Q! J" s: r% J9 m
to check-death
! B1 D+ b' \3 Q. P, |" F ask turtles [
7 P: Q. h/ v+ G3 }! f# D if energy <= 0 [ die ]" f3 _5 t7 q; [7 M' ~' J; X
]. m" e: o% G7 q3 R
end4 M+ \6 x, h5 b( A1 ] j
to regrow-grass. Z. d- j8 e( h9 L
ask patches [' Y7 t, l: o0 y, v2 \4 v$ R
if random 100 < 3 [ set pcolor green ]
% ^, i/ F+ y% U) A0 F ]1 |& y5 \0 j$ r0 h+ K
end4 z. [) }: C" z3 Q
to do-plots
% F) t M# ~- y. l& P: E set-current-plot "Totals"0 @; D4 Y4 A) _2 F! R3 P
set-current-plot-pen "turtles"
5 T( |6 h/ d5 B9 A" V6 X plot count turtles
. [* }$ ?' `3 A* E; y set-current-plot-pen "grass"
* _! d* P6 a- N+ H- Q plot count patches with [pcolor = green]
' `1 X2 [7 R8 R Z+ L% m/ Rend ]2 q9 O: ^2 j. y
可是运行时提示no such plot: "Totals"% |7 y2 n' Y4 w4 {0 g
error while observer running SET-CURRENT-PLOT: F$ m8 B8 b! L" K: |
called by procedure DO-PLOTS; e8 y1 m9 ]$ t- ^
called by procedure SETUP+ @% l' J+ G3 q3 ]& v
called by 按钮 'setup'
; A' G7 Z0 {; g f2 S0 X7 U7 F求大神解答啊 |