我编的程序如下turtles-own [energy]
5 w8 F& n2 i" \" z8 {% d) i/ c" gto setup" m4 @7 d. ]" {) ?1 w3 E0 x
clear-all
6 S# h3 u z* L; t3 k1 O. w setup-patches
/ K/ T! l5 b( ^$ o1 p; M/ x$ K2 H create-turtles 100% f8 }/ g7 w6 W, ?, o: g( o* Q
do-plots
/ n4 r: S# o# G$ l9 ]6 u4 x; M ask turtles [ setxy random-xcor random-ycor ]! a4 {( J! }5 R0 b; X- U6 O
end( u9 g1 Q- K) j+ ^* [7 M! B. d
to go
! R; R4 S" y; N& l# |5 [1 j move-turtles
5 ^* s8 ^( _4 x! k E eat-grass
/ a3 T& A K9 s: D( W- t5 I( a reproduce
5 L. \7 \( P3 R* L4 s" O7 y check-death
# ^+ U# k9 W" z regrow-grass8 H& ~9 L$ p( W# [7 h
do-plots2 h d) x7 N$ L9 ?7 ^& T9 }* }9 ^
end
9 t8 A. g) v3 Y" d0 w" Z; Z- Ato move-turtles! f) u. o& H# i2 C9 f1 l5 }: r
ask turtles [" `; c8 Z" a& O. U$ S
right random 360
" Z. X# L$ I$ c- \# y; X forward 18 m: ~- H8 s |, @9 n. @+ Y
set energy energy - 1- [5 I" ^) h! z W9 n2 S: u3 T
]
, z, U- s2 Q! ?% |; _: Q# B5 S1 R& v5 rend
3 i' m% Z; I1 d! z' @% Bto setup-patches
4 p8 p; P0 l* k3 D2 O0 @' } ask patches [ set pcolor green ]$ W& D) E- C, K7 L, Y* T: {1 A7 v
end
! O0 {! O* Q- l" e; Q9 u. c* hto setup-turtles
+ i- K7 u# A# S* o5 W create-turtles 100
' ^( ]! v1 M# y5 B ask turtles [ setxy random-xcor random-ycor ]
( W% ?( r$ `, I2 U+ U( [% f3 `end
/ h. m9 N! l9 D# v7 r6 Wto eat-grass% f; [ ^, E1 j$ s
ask turtles [3 h, H/ c, \3 U4 L4 |
if pcolor = green [
6 Q& {8 ]& R0 u- |7 H set pcolor black0 \3 n* R, e% \/ L2 v
set energy (energy + 10)1 Y2 v) U) t' l' y$ u
]% v/ |/ \! E+ j' n
ifelse show-energy?5 [2 ^$ b0 b3 v, b) G N
[ set label energy ]* c8 \. ?% A5 ~* P$ ]
[ set label "" ]
+ N4 |8 q" \ p& F9 ] ]' z8 G# Q$ a! {& c
end& ` E) d# w! L. p2 [5 N
to reproduce
7 d: `$ Q0 G$ B n4 y9 p6 j ask turtles [0 A0 \( _. m4 C
if energy > 50 [: G* V7 k5 w# X, d3 }+ R S6 _% n8 ^1 Y
set energy energy - 50
) A( a" E" a$ M hatch 1 [ set energy 50 ]3 E0 T& p5 @" k% }! v$ f
]
+ c2 `! A8 e F; W% { ]
9 ]9 L2 J/ v8 f- rend
R e$ T0 u! n" I8 tto check-death
" U9 d" s9 o, H; x# Z; U ask turtles [* v* E) q* m7 ~ r! {4 H. E* w
if energy <= 0 [ die ]4 |! P* A5 n/ d) @
]6 \+ G0 ^8 O7 b: m
end8 {& q# V$ a) u. ?$ n
to regrow-grass
( t+ @ X" M2 b3 w ask patches [
! Z( u8 e9 v! o4 B if random 100 < 3 [ set pcolor green ]
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end
# C# a) D( a- m0 j* U! R+ e ~: p7 Hto do-plots
9 S0 F/ o+ `: K0 z/ E; ] set-current-plot "Totals"
0 L n5 `5 C- ` F7 v L set-current-plot-pen "turtles"& a7 T/ c# a l: [, `- K+ P' h
plot count turtles3 I T |' L4 A4 U0 F% N# k
set-current-plot-pen "grass". ^: k) f# P2 o
plot count patches with [pcolor = green]: s9 |' B2 v; r1 b, b4 f+ u
end
; m( U* ~, G+ j' i. m+ ^可是运行时提示no such plot: "Totals"- e* i- A& J& y
error while observer running SET-CURRENT-PLOT
" x+ O1 M( a, w' k& n: x1 t called by procedure DO-PLOTS
3 O9 e8 S/ o+ @; W( [" ]7 d5 B called by procedure SETUP# q4 Y( j& O* L7 h6 u8 j1 n: e Y
called by 按钮 'setup'* s w3 F6 O" X" R
求大神解答啊 |