我编的程序如下turtles-own [energy]' ` M* z; x% |$ p6 Q! B2 V
to setup6 ~9 T, L% H/ u) n
clear-all
, {0 F' x. B, ~ setup-patches
2 g( O5 q1 {( P! Q. B7 B( G create-turtles 100) `4 d4 `3 a) x5 Y
do-plots
# N( c! @; Q$ w! ~" d5 n. r ask turtles [ setxy random-xcor random-ycor ]
5 ?6 X+ y7 }- M9 k7 Gend* B/ K: U+ {; V- A. N0 K
to go
$ m# G# P" w& T4 b* o/ }* ~ move-turtles
$ W! Z3 F4 P" l, h eat-grass
+ ]. n' [% i' ^" R, R reproduce2 K6 L! E6 I$ [5 g: s6 s
check-death
9 ^1 c( \2 ]* l$ [1 W& |$ v regrow-grass
" I; K# o* D& G3 d: W do-plots& p9 `2 w0 b. n. r$ f
end1 L2 W. Q m9 C e, \ F% h' M! r
to move-turtles1 f- m5 F7 p. d u: H
ask turtles [
' `9 k' y) v7 o# U right random 360) y4 X6 O) V# q$ i
forward 1 d9 {0 T9 H& o$ A! B& R
set energy energy - 1
7 O6 [3 n) D. C ]
z" t6 m0 f4 I& Nend
+ w1 z+ h7 Q" G. zto setup-patches0 z( {6 L. D3 {) z
ask patches [ set pcolor green ]
8 C4 g% ^& K/ |2 Y% w$ `2 f2 n4 K$ vend
, N0 }6 R- v: _8 f! X6 B& M, rto setup-turtles! u- H. \7 `3 e' G
create-turtles 1007 _0 ~' s- M& U+ m- ~5 k1 z- r
ask turtles [ setxy random-xcor random-ycor ]! Z) T- [& R; D" i
end
- J# ~' q2 K; `" [7 r2 hto eat-grass
8 i& r4 p5 V5 l3 a& ^$ d ask turtles [" T) I: M6 O, H: u+ I
if pcolor = green [
: C% i' t) K3 Q6 M- U set pcolor black" I+ X5 t) I4 N: g, b9 j E, V' A; Z
set energy (energy + 10). _% |4 X4 x9 P% i/ r; Q! r
]6 g; K& l8 O8 h+ S, o
ifelse show-energy?
& O$ l' V9 }9 U$ X& G [ set label energy ]0 Q2 ^6 s* z4 P2 l7 C
[ set label "" ]9 E; s1 q3 \' o0 Z$ ?
]; ~3 v" L- [5 ?( u+ U
end/ |8 k/ E+ H w* n( p
to reproduce: C" r8 ~, ?, F
ask turtles [ ~$ D4 d; u1 }0 m. v5 K- Z
if energy > 50 [
6 h! U! X# ^' m0 w: Q T set energy energy - 50
, e+ [+ f* {" e- S' H hatch 1 [ set energy 50 ]7 V4 Q2 X, [2 E1 `' T
]
5 v3 r: Y- w: M9 J# N ]
! {* h' S/ l5 V$ n! I7 xend
! Q8 p! [, B4 T$ c( H$ \to check-death
: R1 [$ p# f4 f ask turtles [0 V+ \) S# B* R) j% H
if energy <= 0 [ die ]
8 H2 e% M) c% `/ `2 ` ]
6 ^. r( }/ u6 @0 ?end
/ S' ^8 u& E8 y/ h, ` Hto regrow-grass L1 C3 s# |+ _/ ^
ask patches [
& S2 y+ X" z. W/ i if random 100 < 3 [ set pcolor green ]
- J, R. a# D9 ?8 U2 P1 Z ]
. c4 s7 a, I$ n1 z: ?1 k" ^7 c6 iend
& ?! Q4 {4 {' bto do-plots: S3 y3 W/ A! j' |; H5 {- M
set-current-plot "Totals"
# D" g& M) @+ T" _ set-current-plot-pen "turtles"& o; L3 ?& ?- @$ ?9 \ Q4 ]
plot count turtles3 Q. [! d+ X; Y0 Q* x! x) M5 ^
set-current-plot-pen "grass"
* i. l4 {5 u. C plot count patches with [pcolor = green]
( U8 U; \$ p% h/ V( |. `end# x7 F1 b' C: v0 y2 {7 m
可是运行时提示no such plot: "Totals"
& z/ j# G5 Y! _- u. A A5 Cerror while observer running SET-CURRENT-PLOT; X. C3 j6 z2 J: l" g
called by procedure DO-PLOTS
* C$ [8 N/ k0 v- b* X9 o called by procedure SETUP
p* |4 B0 O6 z7 d called by 按钮 'setup'1 B: m9 L l% v& [
求大神解答啊 |