我编的程序如下turtles-own [energy]& `5 o7 ?/ ~8 ^0 J {
to setup! D% v# J T5 o: l1 L
clear-all9 f3 n* {7 k6 {5 ^% ^
setup-patches0 W0 |5 o9 Y3 x7 N
create-turtles 100
$ G" k' ~5 `; d% h. K/ e2 ~8 ]1 I% s do-plots
0 f4 e. p1 h5 c ask turtles [ setxy random-xcor random-ycor ]" B6 N L: W# ^1 r
end* I1 l8 \- s) d3 @% Y$ l
to go
- V" b* s$ b8 d$ j. M4 j move-turtles7 ?6 K3 ^3 o( r1 E! e6 ?% b: R
eat-grass
6 ?5 b! H2 H& U3 ^* e+ u/ J reproduce$ q4 Z+ M2 }2 P+ u
check-death
" v! F b3 N/ K regrow-grass; T% V7 e' x1 ?$ G
do-plots; e/ u* Z( A5 _7 F+ j7 t+ g
end6 P! R# L" q& N
to move-turtles. A9 q5 z( a, M- T' ~! l; Y
ask turtles [ t9 m" _, G7 h8 O& ^) k. l
right random 360
( f& n! w3 b- v. m. ~) _ forward 17 ~! S, D0 y- K' Y% o
set energy energy - 1
5 S6 I0 n4 P: u! ] ]
4 F+ h; K! Z& O4 D7 _end
! n3 i4 W% m) C0 G% O9 sto setup-patches7 a) W) K: s' A5 N) d& w8 A* p
ask patches [ set pcolor green ]; Z( }5 x, z! E, Q" C8 H# \
end
6 q3 F& X' F: k2 c$ I w) Z4 cto setup-turtles2 a$ x B7 g2 a7 j3 E/ A
create-turtles 100 Y2 P2 q7 F t( n+ g* ]: ^% g
ask turtles [ setxy random-xcor random-ycor ]
' D0 g6 U+ x7 Z# Fend
' O" A; S4 ]) E1 P8 s( |to eat-grass: e3 K; x: }- K( R+ x- ?- G
ask turtles [6 z" ?, o6 X4 b' x3 k
if pcolor = green [, p3 W$ `) r$ f2 D2 `) v h
set pcolor black
* K& v* n# E. ^8 \- @% G set energy (energy + 10)( c" y) L k4 W0 w
]/ S8 s. N J; a5 @6 z. v) t
ifelse show-energy?8 Q" G/ R' J8 l" b* G; G% ^
[ set label energy ]( E/ J" E! _1 O: w4 I; N% n) O) j/ _
[ set label "" ]$ b6 t/ g! e" `9 {$ Z
]
) g. t x0 {4 B a9 Bend- j' H* Q0 @. G; _- b5 I
to reproduce
) y+ o* g* J* w6 V8 x: {4 `: u ask turtles [ y' ~. P$ t! N* G! i
if energy > 50 [
! y M5 N2 z1 w# @" X set energy energy - 500 h7 S4 I! Q; b ~) R, Y
hatch 1 [ set energy 50 ]7 l T$ l8 I. Y- @ y4 n
]
4 @2 q: T& k1 x2 J ]
2 Y) P8 R+ x8 S! nend: l! N4 s/ D( U8 [% M: X4 Z9 F
to check-death) f+ P3 k0 i, G& k/ z1 D
ask turtles [
1 J0 T+ R- b2 t$ g if energy <= 0 [ die ]! L- W/ N2 `: f; n0 B+ O0 O% M, C
]5 n5 W+ V2 p( I2 }
end- t& e8 P$ o7 H. z
to regrow-grass
0 U* z& n" S; K% I1 q# U ask patches [
. x1 U! g. c1 t2 v9 f- I( }) Z7 i if random 100 < 3 [ set pcolor green ]; B6 t/ a8 Z$ c, e2 D
]
* }* Q, {) e/ C9 j4 iend
, _" b* h( [% o+ Z3 oto do-plots# J: m- ^, r( v+ b/ C7 F* }
set-current-plot "Totals"
7 T# J: @: K" a) C4 u, b# c set-current-plot-pen "turtles"
' D& E" R) n- k" C. ^ plot count turtles
2 [9 ~8 ^7 T' _% i+ W4 H set-current-plot-pen "grass"- y: L4 Q$ i6 A. P) y$ f- j% v
plot count patches with [pcolor = green]5 f/ K9 s' i/ }! n, j
end
/ R8 B9 w% c/ k7 r* q- K. L可是运行时提示no such plot: "Totals"
. W/ G7 |2 I- l* I# M3 `9 ^error while observer running SET-CURRENT-PLOT. E/ m( W+ f: ?* }1 |- ?* J2 Z
called by procedure DO-PLOTS# @. Q; P& {9 B
called by procedure SETUP
7 m/ d: `" y8 ^+ N called by 按钮 'setup'
, c7 x3 @' |" j4 k6 B$ `$ w, N8 s7 k求大神解答啊 |