我编的程序如下turtles-own [energy]
9 O7 ?3 ^3 d; J& uto setup7 k+ c+ b9 S6 S. @- a
clear-all8 `1 a9 n# ?; ^
setup-patches
( |: h6 t9 I- b% R3 f create-turtles 100- R* i* V4 N H: t& F' \
do-plots0 w0 M; e$ T1 F6 S. s$ f
ask turtles [ setxy random-xcor random-ycor ]
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to go
* v! C- d7 A N, Z8 A move-turtles
' X/ B# M Z, S eat-grass
]: p$ E q% ~( \. l; X: E) X0 x reproduce
$ p# [7 K7 C( ]2 r, n+ s" ~8 v check-death2 C5 ^% N" v9 M5 N# X# I
regrow-grass# X8 I7 L1 ^5 l9 E( G$ F: _
do-plots
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to move-turtles3 C U$ B x4 l! T) E# L
ask turtles [* J" |6 C" m ]; b" _$ `' n6 c7 C
right random 360; h. t" p0 ] X k
forward 1! t. o3 W/ ^) m. O3 n/ } y
set energy energy - 14 i: W; q5 M U5 B
]
: i, \: y r$ D, m M6 _end
/ |/ U# T0 q) V+ s a4 Z. Pto setup-patches P. U j2 ?( q( u6 S# `& b( M
ask patches [ set pcolor green ]5 b$ |# U U" P9 i- B) N3 b
end
/ s* d. w, a1 h6 H$ ?, qto setup-turtles8 ?/ ^* P( R$ \% _7 C& @6 ~
create-turtles 1003 e% E* s/ \0 c! x
ask turtles [ setxy random-xcor random-ycor ], `) s) [3 G5 e* @) w
end
) S' h5 M2 K8 z" Sto eat-grass5 _; w% A4 V9 X4 s+ l
ask turtles [
* u& q: q# A5 W& C7 t) W9 ?7 Y, C if pcolor = green [) P2 P/ l: i' o
set pcolor black
, H$ `: g9 `, q0 D5 ? set energy (energy + 10)
A; T- N& t4 [' V2 a1 r ], \7 E8 O: X) ], h8 g# T% d9 c; j$ M
ifelse show-energy?
9 x% i/ R* n: r. Z2 Q5 j6 Z [ set label energy ], G6 u( `3 x% @) A! A
[ set label "" ]! U' i* d0 U2 D, z6 j0 m! s
]+ q- V7 @# P( A" y3 c0 B& R. y
end
( V1 I3 \' Z( l9 \0 Y& zto reproduce9 R8 `+ B6 b; E6 |
ask turtles [
& Q$ s5 P5 j& L: B8 P* S if energy > 50 [
% s. F$ a6 I4 t0 l8 A set energy energy - 509 z1 m* G0 T- \+ r0 ^
hatch 1 [ set energy 50 ]
+ Q5 J/ k, K* v2 z0 h& O! Z ]
- ]+ T" Z$ c4 j, e5 ?: E ]
+ |; }2 M# o" e% i ~end
, T* p' A! q. X4 L+ v( S0 J) wto check-death; x& [: V' A4 h/ X" U
ask turtles [
4 k: z) J5 u' f8 X if energy <= 0 [ die ]
8 i) ]( u, V& N/ y- i: q/ D ]
9 b9 A- P: R) Z/ Y: N7 j: Wend
: P% t0 Z8 h+ l! n3 C' R/ P; Uto regrow-grass
0 |. z( n: z; g7 E* k3 { ask patches [
7 C9 q8 n5 r8 B4 i5 T- h, j if random 100 < 3 [ set pcolor green ]3 l0 o1 c/ o6 `6 C3 z
]
s% a6 C f: Tend8 N$ G$ Y% k/ c U$ f/ l2 W
to do-plots; o. ?! e) D0 I; Z7 o
set-current-plot "Totals"
4 i, v+ P3 ?: x3 ^7 M; O set-current-plot-pen "turtles"
* h% x% S$ t$ j" Z" L+ C plot count turtles
6 G- O7 w1 T" _- L set-current-plot-pen "grass"$ g& n; f3 n+ r7 u5 O7 F- c' h! Z0 x
plot count patches with [pcolor = green]
1 m* Q6 P( G6 l! G Uend8 x3 k }; e' d( ]7 m
可是运行时提示no such plot: "Totals"5 A' H+ ~ g# H ~
error while observer running SET-CURRENT-PLOT
7 q3 Y% K% o' M8 C called by procedure DO-PLOTS$ g \) w/ V: T& T
called by procedure SETUP
2 S( K0 A/ K# y Z6 R1 t called by 按钮 'setup'
( k! ~' p# K1 F$ X- `2 d2 d求大神解答啊 |