我编的程序如下turtles-own [energy]
9 P! s0 W2 A. S/ E1 hto setup
& e2 }2 w8 N C9 E clear-all. |9 I7 ] o& m' `* W+ k. F& n& J
setup-patches% w7 E0 B% B9 ~. W
create-turtles 100
. J# B5 Y7 t8 J2 [& [# ^4 j" h do-plots
1 ?& q: M& C6 l9 T" {. q( N ask turtles [ setxy random-xcor random-ycor ]
R! |, I8 f% w8 g. D. {end. z: F* Y9 Z8 Y) [2 g
to go: B4 S% g3 V( L; a7 t
move-turtles
/ g9 M. ?. ]+ G4 ]; r/ |+ X eat-grass. ?1 G6 m* m% l
reproduce
* X T0 t& d" I8 p" d check-death
# d0 i* C6 v% ], l( ~3 |) _ regrow-grass
5 H' \+ K5 M; J do-plots! w% W# L. d/ v; b$ [
end4 P- [5 o6 o' ^$ [) Q
to move-turtles( D; m9 u8 k3 S: k( |) O" C
ask turtles [
9 T; u2 _/ y( c5 g# T+ r6 W right random 360
% U: F9 g# L9 e8 c7 V forward 1* p# w( V) A3 g7 N. @; B
set energy energy - 1$ n" I& ~& ] x. X. g4 u. l; A' Y i
]# k# E# h/ G0 ^2 p8 u" @) o0 z
end7 {/ B+ m' m& G" _& z: F" b8 D+ }
to setup-patches
- `3 ]3 p w" p) Q7 s* Y0 _ ask patches [ set pcolor green ] z2 p/ O2 k4 d9 h& ]% a0 Y8 r+ e
end& W; I' m- D7 h2 {$ F! Z2 |; [
to setup-turtles
0 V- ]. s; E E) M create-turtles 100
$ o" [! p! j1 { ask turtles [ setxy random-xcor random-ycor ]" [) y [. Q& X
end6 c* d: n( e( C, k' A3 h. [+ O
to eat-grass8 _9 @& k5 A( |, X# I
ask turtles [0 e2 J' J/ B" d8 J; {" R3 m% T
if pcolor = green [
, e5 {5 @' y( B set pcolor black* t2 p' i1 R5 K; V0 F9 a4 J
set energy (energy + 10)! z9 p9 ^3 b4 a2 x) c | o, o
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ifelse show-energy?
& R) w1 C! w# o [ set label energy ]
6 u- Z7 F. O$ }* I4 Y1 u+ ?/ E [ set label "" ]
p; B! A' v4 ?- M ]$ e4 I! m, ?' V, a
end
- s' L) d; M, J8 |6 i# N; E3 [to reproduce5 N5 F6 W _ I
ask turtles [
& K2 h6 X2 b; R/ o B; U if energy > 50 [
; B) K4 q1 K- V set energy energy - 50
" j+ v$ Y% h+ _& k: t# x: [ hatch 1 [ set energy 50 ]
& J/ q& ^. k/ u ]
* G( g' H9 Z; a6 w8 a- _ ]
5 }" q" E/ P; [. g# `end/ ~* y, }# u& l [5 v
to check-death
) R" q4 n0 L+ }6 K; a% J3 c% s ask turtles [* h7 H( q% m$ g) R
if energy <= 0 [ die ]
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end
- s2 e V, H* Q# M" sto regrow-grass8 g. b' R3 N) L! W
ask patches [. D; h1 K. C" L, V8 K8 w* \& ?% `
if random 100 < 3 [ set pcolor green ]
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, E6 ^7 b, |) ^end) w4 ^& @) g0 {* J. R$ z+ J" H
to do-plots2 ^3 Q' Z1 e9 k$ O: v6 @5 ~( t4 w
set-current-plot "Totals"
$ x8 Y y9 H5 N0 f) t) k% I/ u" m set-current-plot-pen "turtles"( n' a# m; M. A, b1 W5 F
plot count turtles( k& b8 R, I2 o7 f. {+ _, Y" J, a
set-current-plot-pen "grass"
9 m6 v: ^- G2 k) _9 B2 I plot count patches with [pcolor = green]
7 y# r" e6 K; tend
. X+ ]* u1 J5 M/ R" w可是运行时提示no such plot: "Totals"
/ x% o& F u/ O) x$ r4 h, j& N2 nerror while observer running SET-CURRENT-PLOT
& B0 D/ V6 [( w3 h% @) ? called by procedure DO-PLOTS) I+ ?+ m& I; w* { v5 _' r
called by procedure SETUP# s9 S8 R- ?/ c
called by 按钮 'setup'
6 l* K& P/ z0 y8 A% N6 Q求大神解答啊 |