我编的程序如下turtles-own [energy]
J/ S! `/ F, J; ~2 yto setup
9 `/ d' }# t; z3 R5 j! Z1 O, j clear-all8 T" |9 d, N( ~% ]7 {7 e+ ?
setup-patches+ F) U) N+ J2 D2 W. M0 L; Z D n2 r
create-turtles 100$ K1 y9 h6 j2 R% v' p) j ^
do-plots) `) K4 o7 G+ g Z
ask turtles [ setxy random-xcor random-ycor ]
$ L) F5 D3 k0 A; [1 i% j" A! A! Nend$ H/ O$ u3 W0 l& R1 ~" X8 z3 j) m( J
to go5 b4 ~) r1 y% i
move-turtles
+ G0 K# ~8 t$ d% K9 h: O1 u) c eat-grass7 ^& l: m- p+ z
reproduce
8 \! _* R; x$ G check-death5 g- m/ m, K' X
regrow-grass
7 S" q; I* `7 g; b! v5 r) ^ do-plots
. T& a: {: N: V& n7 lend
" O; e3 t1 G& e1 a+ sto move-turtles# m5 }4 Y3 F& [8 }! U
ask turtles [
$ H7 E: `+ c$ T# v7 I5 c& J right random 360+ c5 u5 K/ {: V
forward 10 R) m- k7 k5 r' f: m m6 e* p# [
set energy energy - 1/ f4 J7 ]6 `1 T! h' g8 d0 D
]
1 T9 V1 M5 c6 f- ], A8 m4 aend( w* B) ]& `8 y3 o
to setup-patches
. s8 N# v4 c7 `+ I; i ask patches [ set pcolor green ]+ s! I$ u4 i, J y( g
end$ E: _% p7 q) H* i" @4 q
to setup-turtles* Z/ p: } u/ m# `
create-turtles 100% I. j; [0 E2 @6 o, t2 k1 g
ask turtles [ setxy random-xcor random-ycor ]" o$ p4 a! H6 H/ _
end5 q; t' p: l ~# G: F" J
to eat-grass( V) A( D+ @' v/ }
ask turtles [$ C! @& J/ H# D8 k- V( e: {
if pcolor = green [) M' p. @/ W. ~' R+ j% ?
set pcolor black
& b0 q3 [' _% [* d3 P set energy (energy + 10)9 B) `5 c) I; M* M1 r5 P( V
]
# I1 Q) i( F* g/ H+ `/ f; q3 b6 } z ifelse show-energy?
/ n& B$ P" v! Y, n8 V6 V j [ set label energy ]
v2 ?6 [! e6 }5 \, J5 | [ set label "" ]; t7 }" s0 S2 i
]
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to reproduce
k4 l. L% |2 o/ _/ E ask turtles [* |) q; m" @2 Z8 l
if energy > 50 [# x2 m1 [, x/ r9 u' b
set energy energy - 50& [" v) L: ]( k3 o
hatch 1 [ set energy 50 ]7 U0 C) p& c, [* j; v* L! P& I6 |$ j
]
. j5 e0 D, X3 Z, ^7 r ]
" o% r. ?4 O$ H" i. Yend0 i q' p( ^' }
to check-death
, ?- p: e* H. ~# G+ ` ask turtles [( q- o4 w$ n( i0 L% _( z" P
if energy <= 0 [ die ]5 d* _7 m$ V' G
]7 J6 d9 y. z% M2 X
end
" m8 ~' d/ O' {! \0 w* {to regrow-grass. ?1 x1 g Z& v7 Z
ask patches [& z% f: @$ E1 `( U
if random 100 < 3 [ set pcolor green ]# [9 z2 y @1 I' M1 u) s+ C: L. s" g
]
( G& H- W1 D5 K, P4 z/ Lend
: A0 }+ y% v" Dto do-plots
' d- i' l; ?+ s% y set-current-plot "Totals"# ~9 W! G; o7 T! R" }* q
set-current-plot-pen "turtles"
6 R8 Y2 Z }2 ^ P* [ plot count turtles0 a3 }, x! E0 b6 [0 V
set-current-plot-pen "grass"- d) C; H. p7 Y. w+ }$ Z; a
plot count patches with [pcolor = green]% ]+ d5 G5 ^5 \6 M2 e# B
end
5 `5 @0 I' G- ^) w4 v+ j可是运行时提示no such plot: "Totals"
" S$ e3 a; k7 A, uerror while observer running SET-CURRENT-PLOT
* ^- G2 a& V' p$ }, d- m called by procedure DO-PLOTS |) k, [! s* q% m) x
called by procedure SETUP% H6 j7 z9 w% S5 H
called by 按钮 'setup'
7 K1 R5 R! L1 O6 P求大神解答啊 |