我编的程序如下turtles-own [energy]
Z/ q" P- w5 m5 O) _ D0 h& L# ~to setup# d$ `" A4 e0 \+ ?7 N6 p
clear-all
* J* u$ ?% D. j2 |; b setup-patches
8 s( S% m3 n3 ]; ?/ C% a) ~) _ create-turtles 100
, s0 ?2 p4 u5 c0 c8 G4 S; c do-plots* n3 Q0 ^5 {0 `7 ]0 g5 f
ask turtles [ setxy random-xcor random-ycor ]) F4 u; x g, Z5 H) Z
end9 A# u) ?5 k5 V" k
to go4 ~& m+ @& O) K; o
move-turtles# T+ x- W$ T. Z- t- b$ i
eat-grass2 Z+ } Q' n- t% d; m1 z
reproduce
' Y c$ h& U2 i* e check-death
* x; o$ _" F) Q0 M9 S regrow-grass! k- t4 R. _! N8 l) e" a) m
do-plots
/ j- j. b0 i9 rend
. z8 h7 n& O0 F1 ]6 w2 ~to move-turtles
3 z! N( p- r0 Y; r2 K: B ask turtles [
8 | A5 z/ {4 ]4 x" |7 } right random 360; K* `$ }! d% H7 Q$ `
forward 1
1 N9 w8 O# t! }! n set energy energy - 1: {" M# w! O/ V
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end5 Q, k! e2 b G5 o! \- H( H3 }
to setup-patches
- @) ~+ A$ A9 f7 _ N: |3 [/ H ask patches [ set pcolor green ]2 k# D6 p' f0 \4 k
end8 M7 Z3 O1 j7 a. D* V" L
to setup-turtles
3 H- I, ` N3 z$ t9 B5 z( y0 q create-turtles 100
* g; E2 a$ P) p ask turtles [ setxy random-xcor random-ycor ]# F' L. G5 S7 _9 F8 m, Z; W! [
end7 K! I" ?8 O( m; d: P0 M
to eat-grass
: ^ c3 z6 x6 @6 W: K7 o0 @- N# R ask turtles [
9 V' C# A7 s2 s8 I6 i9 e8 x if pcolor = green [
; y9 z M3 I4 C7 j+ W, M set pcolor black: t# a, m4 t7 u: {
set energy (energy + 10)
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ifelse show-energy?
$ [% [' x5 h/ Q V6 {' w [ set label energy ]+ K9 L2 a8 [' `6 h% P/ ^: q
[ set label "" ]
+ L+ j9 I1 e* ~2 l ]! s+ l2 J; w6 V' V2 E* B$ v
end1 k; f" G( k1 K
to reproduce
/ ~! r% N. t9 \) u# f( K# S+ s# y ask turtles [
5 G3 T1 B2 v! B$ E# {, y if energy > 50 [$ i) K1 m o9 I* J6 |
set energy energy - 500 i9 G A* {, F, d Z3 x% `9 u
hatch 1 [ set energy 50 ]
+ }0 S5 K) ]0 r- q% F- p ]
$ p# r) }7 g% m" }# X; K ] _( I9 F& w" o& M1 S, p. E* P6 a0 M
end
c7 J& z8 @4 d* s. dto check-death
6 K6 Q3 b) R* |$ t' }4 r6 E ask turtles [' C: e/ [6 n7 ?8 S2 d8 k! ^
if energy <= 0 [ die ]
# q8 Q: e5 b# P+ t; r) q. M ]
' r7 {# b, ]- ]! R/ ]0 h1 D- m4 Dend6 R, v# H( M( R# W
to regrow-grass' |/ p3 g, V8 s' `% N
ask patches [; ]1 }4 u& d- q9 k8 ^
if random 100 < 3 [ set pcolor green ]
" @' M) _: w4 k+ F ]
* x2 `& L7 q" b/ q! qend( d9 s+ q( K. z: I4 A
to do-plots5 O" ^: q2 A& J# c
set-current-plot "Totals"+ ^/ W; f: C* L! o( ^
set-current-plot-pen "turtles"/ P* }9 C$ ?0 G0 v* h, ?. N! }3 Y
plot count turtles
7 E0 f- x' A, y H set-current-plot-pen "grass"/ u! c' x1 H& s
plot count patches with [pcolor = green]
' h& A/ H* z3 R. S0 kend
! V: l: P: {; z- N# M# f7 M# b% x可是运行时提示no such plot: "Totals"
% ]! b6 G6 U- n0 H6 Jerror while observer running SET-CURRENT-PLOT
) P8 e! |& q5 b! @( V called by procedure DO-PLOTS
0 Q1 Q4 F1 L' f% s called by procedure SETUP
# ?& e) `% X$ M9 e called by 按钮 'setup'
% Y5 J! ~# ^& r" L; b: j/ I求大神解答啊 |