我编的程序如下turtles-own [energy]# D) S ^% B6 U% e1 M. X; `
to setup
% Y4 m( s, N0 o/ F x ? clear-all6 S7 E% Z9 L- W% @6 n( @
setup-patches2 w' r8 }) {) T# j' g
create-turtles 100
4 ~/ {( C! \( x# n; ^; x do-plots6 }4 B8 |) L( ~% r
ask turtles [ setxy random-xcor random-ycor ]
3 j' O+ T v' Y7 qend/ E t0 U) z% N. W E) ~; M6 ^. P
to go
, x* b' n0 W- m$ t! |- o move-turtles0 v' w2 g. u0 z, D* A B
eat-grass& c+ Z! ~0 @( X' f7 d* F
reproduce8 x, O, {0 f+ C W" @
check-death d5 i# e3 \4 S1 d4 B |: t. i0 i
regrow-grass2 j. T9 R* l" Z8 L \ k
do-plots6 I! B3 c7 O/ W: r- }2 U _% U
end
: e1 L2 o% b, a z: j0 ]8 W& E$ a* Zto move-turtles, t% t8 J9 k9 }6 a+ R
ask turtles [
2 Z) p, O V3 u. Y8 J right random 360
$ n {& ~5 ]- N, O forward 1
4 _6 m; Z+ m9 @5 h! ?" c set energy energy - 1* {6 [2 z3 N, P% a% L
]& D) z$ ]9 w; _0 E% w
end% H/ h4 M) v$ c
to setup-patches$ s* c9 Y4 G9 {/ a/ @6 A" I" S
ask patches [ set pcolor green ]
( V& J; B& h+ L1 K1 y# W- Jend
1 ?2 M* f; T6 P* M6 W9 Eto setup-turtles
, g, }2 l- c2 b7 c& t create-turtles 100
4 s; `1 |! {% Z% } } ask turtles [ setxy random-xcor random-ycor ]& g/ @/ F* p$ m6 V
end* e( f- {" C( w+ Z- [' `
to eat-grass
" e1 o. x5 G! k% x# B v ask turtles [
. \$ Z" ?# n. g4 b3 S if pcolor = green [
2 |8 E5 ~6 j1 S! t: L& f5 c set pcolor black
& q i. r1 O6 @ set energy (energy + 10)
3 x& V0 [9 j* W# u u6 ]. J2 r- V+ f# Q ]
+ X" Q( X$ g2 @* B& L ifelse show-energy?
, X- i. x1 w# Z7 J [ set label energy ]9 [6 v( E: y0 [* k% p( H: f
[ set label "" ]
, c4 W& l# W& g- u5 | m; c4 T ]
; L4 v S' x$ _: d1 ? @! l# fend. W- V9 @2 Q9 K! `' z& R8 x* [
to reproduce' q O! y# c* G6 f; k1 D2 {1 X W% T+ K& h
ask turtles [2 V3 f0 K+ b& A
if energy > 50 [7 P2 A3 r4 e0 ]: I- l: J
set energy energy - 50
* `# A7 E6 A8 { hatch 1 [ set energy 50 ]
% Z, d, J6 `; @4 q( ^$ G! d ]2 c) q& A! p$ U% k- x2 G9 G( [, |
]
/ h Q! z% \9 k+ L, u/ Xend
- B( ?5 \3 F: ]+ |to check-death
9 t7 C8 e8 y. x; I+ b% U" E/ w ask turtles [( |8 E' Z9 Q8 ^( q, ~
if energy <= 0 [ die ]- u$ Z+ F: e! f x2 @7 Z* y* l
]" h! B: i: M/ d8 R8 X+ H
end
* `# f! V5 @1 ^3 {to regrow-grass4 \7 g# {: I* l: f' z3 y5 C* k
ask patches [
: C5 y( y3 M& p. |) k- T if random 100 < 3 [ set pcolor green ]; w/ P/ p& @: p3 r- g- Q
]
" r: W& c% Q. z' R0 o1 J7 t4 W$ Iend
8 V* l. n+ N; D- |+ eto do-plots7 c; U" K1 ]4 p' O1 U
set-current-plot "Totals"( q0 ^* l# m! Z/ J O n
set-current-plot-pen "turtles"8 A+ K8 G& C# Q; i
plot count turtles% v9 s# e* | v
set-current-plot-pen "grass"$ s2 c3 ^+ H3 ?" |
plot count patches with [pcolor = green]
$ t9 `! F* |8 L0 Hend6 \8 P4 A4 ^. y( p
可是运行时提示no such plot: "Totals"
3 h+ G0 ^3 g' a+ w, V2 u* oerror while observer running SET-CURRENT-PLOT
" ]3 q5 c( p% {8 [9 }7 X called by procedure DO-PLOTS8 B J6 j1 s- ^. D& y+ d
called by procedure SETUP
9 ]8 N- [, T- q& `+ p7 K" f called by 按钮 'setup'
4 J) y4 {9 J% A s: V求大神解答啊 |