我编的程序如下turtles-own [energy]
4 z# g" k3 P; p* v4 M k2 p3 U8 _to setup4 k) v" I r N+ c! K
clear-all8 w3 c6 u* L6 E) M
setup-patches8 q- E( T n o5 v
create-turtles 100, g5 k6 V0 d3 @
do-plots, S/ @% j3 H- J1 H& ?
ask turtles [ setxy random-xcor random-ycor ]
6 o( V5 \1 m O; {# Y" C O% zend( _; z X* Q- d9 K; Z3 H
to go
8 g: A* h- U3 F; r move-turtles" F! [4 b: w/ N3 L! A: @
eat-grass! z% S1 k$ N1 j) _! ~ ~
reproduce h" G0 m5 _1 n/ n
check-death [' @1 I8 }( y$ y
regrow-grass
6 a6 U% U. i, m& K8 S do-plots9 _$ A8 ~) X( u: _) p; c
end
; P6 z9 R5 W% w( K1 eto move-turtles
8 V( I" p6 s/ u2 D: p0 M- D' G ask turtles [+ J* C9 c, [3 m) ?3 j0 L: [
right random 3600 j1 D4 z; K3 ~' ~7 H1 \/ M
forward 1
+ Y( J0 {% A7 d& U set energy energy - 16 Y, i' P! U" Q, Y# X
]
6 u( g3 I6 ?$ @; qend
2 o X; b3 a" l, H# zto setup-patches; d: F! T1 \- d) k4 k f, [" y9 _
ask patches [ set pcolor green ]
7 H8 U8 J3 v' M8 o- l+ K* oend
; ~9 Y# c/ ~- e, {1 A# d9 hto setup-turtles6 x: ?( z3 k, ~, w/ d8 {
create-turtles 100
" l8 v2 j7 ]: b+ P. x: d ask turtles [ setxy random-xcor random-ycor ]6 j# l% k$ |1 ]+ h% u
end
" L9 Y/ `7 V: C2 e7 S& F% nto eat-grass
* f5 z5 K8 |/ T% ] ask turtles [
9 c c# x5 R, h: H& ]: D3 V. F if pcolor = green [0 a3 z$ H5 Z) t3 Y7 p- V
set pcolor black. C$ b9 c, r2 ]) H; u! Q
set energy (energy + 10) p. g4 U8 t) L+ q
]% t$ ` o, q% ~) A9 \
ifelse show-energy?
& S. g: Y, _. x+ I [ set label energy ]) W+ n, S, @) U& T" V7 z
[ set label "" ] S' r* K5 `. [
]
; x* D+ C4 [/ T# b* a# aend2 K" x( s) L. ~- Q. O! v' V9 g
to reproduce: y7 f. `0 W) k# Q- x' y* H# p
ask turtles [
; @: j. l7 X: R3 T0 l" f if energy > 50 [2 ?( y: C, |5 G% g# `# S
set energy energy - 500 M$ i- G% a) P/ k* D) t2 l$ K
hatch 1 [ set energy 50 ]
- a" x6 M& g+ r3 a ]! H' L7 X* w& x8 `+ y
]
/ z, N8 J8 ?, z$ H" Z/ Iend
- C* V" J* D2 c$ X2 y8 C% nto check-death
; U, i' X* e: h7 _ ask turtles [1 z' |, A; y+ V9 `4 ~- O% Z
if energy <= 0 [ die ]6 d- x6 f: V3 t
]* O- t; Q5 L8 x3 ^# m& D
end
! A0 W; X' C9 e; B- k8 R! Dto regrow-grass/ k9 x& I) ^$ |1 D$ V( Q1 c* I" K
ask patches [
9 O4 u4 J p2 n* H9 Z if random 100 < 3 [ set pcolor green ]
7 K7 v4 s/ ]' V9 F8 j1 R" p ]3 ^" L: l2 Z+ l7 t* a& p
end
3 {& s$ d0 A# c+ x3 v9 mto do-plots
& r0 C/ ]. E: [4 v( n) Y set-current-plot "Totals"( f0 J' A \. f% l8 V
set-current-plot-pen "turtles"
G$ Y4 W: [1 g- M4 X6 j! f plot count turtles
; {$ X$ H! T5 l$ h& }5 h set-current-plot-pen "grass"" o) B: n$ ^: D. B9 U
plot count patches with [pcolor = green]
: d @6 M2 }4 \3 ?, Oend
, B; o2 V* D( }( b& z可是运行时提示no such plot: "Totals"
8 ~& l, W* _2 g: v- C6 f& y/ {error while observer running SET-CURRENT-PLOT- s4 o* h" V, m6 ~' o
called by procedure DO-PLOTS6 N& p( A ^2 Z) }, M
called by procedure SETUP/ G" ]% r# I0 i+ u* r2 E; L
called by 按钮 'setup'5 h3 X0 `) ?' a! R% x( F% f
求大神解答啊 |