我编的程序如下turtles-own [energy]
5 ^0 k* U" H: Q' Tto setup) x0 Q% U; H4 D6 h" ~$ |) F8 e
clear-all
# X9 E" N) w1 ]2 q setup-patches9 m0 D# j* ]- A5 Q" y; p, a
create-turtles 100
& q6 ~- Z7 x& `! p L8 M4 k do-plots1 L1 D2 P- t- Z- ~. ^5 p
ask turtles [ setxy random-xcor random-ycor ]6 `* f/ L3 D5 `! a7 B
end) {: |* {0 U) k: u9 Q3 R+ M0 O: Q
to go
2 U/ s# K/ E L2 [* | l move-turtles
+ \$ x# Q7 }% ?3 c% a eat-grass
, w# ~! ?2 K6 C+ Q3 g8 c reproduce S3 U5 i- h' g# G1 @, q) n
check-death1 ~ F& F0 \5 h5 h7 _5 ~
regrow-grass& {3 J0 z; V7 y0 t k9 \1 _- B
do-plots
9 ^0 `' T! e+ T( C( u4 O, x2 Tend
* i/ L- T+ e) ato move-turtles+ u- S. F( t. _, ~* x, `
ask turtles [9 |4 H3 u! x! P% D- K
right random 360- @: n2 h/ r' {9 a% Z
forward 1
% S& d; B9 y0 s. Y3 X! s set energy energy - 1
( L/ X! W& i t E% ` ]
* \' d# y8 j6 d7 Send
% E A5 L: e: K0 Qto setup-patches2 o$ O9 N+ a" T% o
ask patches [ set pcolor green ]
. ?1 E& N- o \% [ ]' e1 V4 hend
0 C! ^% o5 S8 d2 a. I0 r( eto setup-turtles
; q# J3 c5 q( h) F# A3 D: N' n create-turtles 100% c* S' b4 ~) S0 w8 M2 @
ask turtles [ setxy random-xcor random-ycor ]- v( E ]* A( h/ k1 `
end+ H( c: v1 d0 j/ t3 [
to eat-grass
% Q5 d" Z! c2 x( s0 S4 m; ^ ask turtles [
4 _* W" F, Y- h( d7 Z& m" J3 b if pcolor = green [
2 Q8 c6 M: |3 r% ` set pcolor black) O, m$ a) G$ q! M
set energy (energy + 10)8 l8 I g9 K9 m& h5 O+ q
]; [# O, T* w) _. d3 m5 \: |
ifelse show-energy?; x: ]* @0 w# @# X
[ set label energy ]
$ z7 _' c& X2 s. r [ set label "" ]6 v. J ?. @# `
]6 U2 W' G5 [$ I1 R' v/ B
end
% G' N# E2 i% P, ?to reproduce. \; L) l% E& e& v! k- n
ask turtles [
& ~, W# I& i& A" Z3 R if energy > 50 [' S, a3 x. d- v0 F9 _5 X
set energy energy - 503 Q; I5 x; P' X
hatch 1 [ set energy 50 ]1 u) a* W ]4 `) a
]+ m0 d% M$ P4 Q6 o$ p
]
- g1 [# j. v/ p4 `6 Gend8 S/ r& v6 ^; X# J! u* i; L9 \/ c
to check-death
3 h* U5 H1 q6 b$ X; F' u0 o% C ask turtles [3 u! ~, V1 z+ [0 R2 h
if energy <= 0 [ die ]
8 i/ ] U: i4 G3 a! S ]$ M0 F( H3 I# R
end# z) a. [# e% {
to regrow-grass/ d0 N8 t7 m; d+ o' p, c) _; n
ask patches [
7 _0 V; f: N/ v: A5 }# [! w if random 100 < 3 [ set pcolor green ]
+ H3 {+ B7 N8 U/ u ]
% u( s1 `7 }4 |0 Cend: B' l& c' U1 N! L! d: x
to do-plots
8 |8 B6 U* U- D2 B1 @& q- k1 x- L set-current-plot "Totals"7 i7 r1 N3 }; i
set-current-plot-pen "turtles"! \3 t9 S3 v6 l, w. I4 ^
plot count turtles
* g- v8 |1 b; P1 p2 k9 z/ h set-current-plot-pen "grass"
' ?4 K+ O# y4 `7 [0 [ B6 M plot count patches with [pcolor = green]0 B' g' m4 m8 |6 S% r
end$ j$ }9 w1 ~ C8 |
可是运行时提示no such plot: "Totals"
7 b# R3 o2 o3 ~! gerror while observer running SET-CURRENT-PLOT
, x2 `# _* u; F0 y" g. { called by procedure DO-PLOTS
( ]/ S( c0 q( Z- j# K9 F called by procedure SETUP
8 h5 I) u& z4 N1 f2 V, y: ~: n! p1 J$ ? called by 按钮 'setup', F0 v$ H9 f0 R. u5 n8 |
求大神解答啊 |