我编的程序如下turtles-own [energy]! q, o, p2 y8 i n) |' o0 \
to setup c0 r" y# c: }0 A" R9 s0 }
clear-all. Z( J5 c9 G' y# U
setup-patches. z9 n% _: i: i0 ^1 d2 ^
create-turtles 100- d0 W5 d1 W4 `7 J# o' D3 [7 y
do-plots
! K( J4 _9 ~- s6 g" n7 A' h ask turtles [ setxy random-xcor random-ycor ]
+ D6 g, m# V9 p5 z3 F* n/ f+ ?end W U. H2 Y; s' `& A! O+ M
to go1 n f- J! `3 Y" M- ]0 b
move-turtles" K* K) s1 K/ ?* _% L
eat-grass1 a/ x+ y; s, b& t! d
reproduce: Z3 ` W# Y" b+ V3 ?* \
check-death v9 u( b4 B0 z5 \& {. m
regrow-grass5 y6 I# {$ T1 c! R2 Z" h# q
do-plots
P0 j+ r2 R$ H& R6 F: z0 Rend: D2 B% R. g. p Y8 a, A
to move-turtles
$ U& m4 {; n1 a0 `- f e, ^1 |3 z ask turtles [
% `6 G G U2 m5 M& X! j# Q: B: X right random 360
8 D$ t5 u! M+ ? forward 10 C$ c+ c/ P' Z* i6 E
set energy energy - 19 N: f0 C0 t% |2 @: Z$ \
]
+ A! }- t& m2 Dend" V: R* @) H* i: ]" s7 d
to setup-patches" {+ c6 @* [1 u' S8 D: M. c
ask patches [ set pcolor green ]; h' O2 Z) o, C( k* x
end
0 v" ^' `* p/ f, u9 M4 V1 kto setup-turtles
4 s( ]$ b @0 L2 T create-turtles 100
! r9 [1 r6 t* b7 m2 q ask turtles [ setxy random-xcor random-ycor ]8 J: q% R( ^6 i5 f+ |
end7 j3 B" ~3 k# S; E) N1 D# {" E
to eat-grass3 e" L% r8 _$ N# {8 U
ask turtles [9 S0 Q0 d! d1 X% L: I- Z+ d! G% Z
if pcolor = green [
8 I1 m1 |" A$ W! P' E$ n- c2 N set pcolor black- E* w! } S' E: |+ T
set energy (energy + 10)
2 l; ^9 r! y4 i ]
$ L7 v0 Z' {$ W% W6 j1 V, R* f ifelse show-energy?
$ u$ j( H% Z- i/ z [ set label energy ]+ r& l z& E: e* Z
[ set label "" ]
& d3 b. p) s& l$ o- r1 g! | ]) S$ P& w) C0 T; t: _/ I
end
9 m! E2 }. ~$ Jto reproduce+ ?- X% q2 l; V N: J
ask turtles [0 r" A4 x5 y- [
if energy > 50 [
7 Z$ C$ @- Q( j set energy energy - 50
1 ~! v* ]8 c) h2 E& X! J x; }9 u hatch 1 [ set energy 50 ]
0 ]; h4 \, V+ p% D ]5 ]! x+ J6 G8 }$ K
]! Y, q: O, H! o) q
end7 ?3 W" n8 [0 f% C5 k& |& p
to check-death
+ T9 I8 F/ L7 u, R ask turtles [& P: Y1 C, t9 W+ f" Q' Q
if energy <= 0 [ die ]
0 g& u( o/ x( h7 \0 b4 U& d' J ]
. M* h7 h9 u9 i, U, {' M4 ~; Iend
# v9 _' m( n1 C% S# l, n: |1 Z5 W: ]to regrow-grass
5 e! Y1 e# S' D2 O/ C7 Z ask patches [
* P* l8 P; B* |: i! B' o9 X2 | if random 100 < 3 [ set pcolor green ]
( k$ p! x/ k S3 a$ p, \& s ] t6 T3 K$ A) s3 u# a, t
end) H8 \5 Y, T4 z4 N
to do-plots
6 b7 f% M8 s0 S+ @ set-current-plot "Totals"4 a: A* p5 A% E$ f1 |' b+ I
set-current-plot-pen "turtles"
) S* u* Z' _ u plot count turtles
. I7 U+ M- g, Y7 y1 p( @ set-current-plot-pen "grass"
/ |( a7 O. ]# E: ~2 S# l; [' Q: L plot count patches with [pcolor = green]
) b; M8 `! n Z; `, q8 bend; }* [) T4 q6 j3 f4 v1 J5 o5 a. c
可是运行时提示no such plot: "Totals"/ F$ f8 J8 x# S+ ^, k4 q6 C
error while observer running SET-CURRENT-PLOT% U9 Q# _) Z, a8 ^0 n. d
called by procedure DO-PLOTS# {% f& n% z, S7 `9 Z
called by procedure SETUP
2 W$ l/ L5 r" _" g: j called by 按钮 'setup': A/ D/ ~0 I" G# d5 i* B
求大神解答啊 |