我编的程序如下turtles-own [energy]
) G9 Y& G/ U2 D1 M* D+ mto setup" y7 X0 e# E7 v4 c7 o
clear-all; R7 k9 d2 A% ?2 V+ L
setup-patches: a S: C0 {0 g1 A
create-turtles 100
. n/ O# h2 T$ B* g- W$ s' }, P3 m do-plots* O2 B8 x8 X) I. J- `
ask turtles [ setxy random-xcor random-ycor ]/ S5 l; d; H; h; B2 C
end
6 D* z. M5 v! C; Mto go
- n. T% T, e) I( `1 T0 J6 n* ` move-turtles
) C' w4 V* [9 W/ ` A7 i1 u eat-grass! _* h1 |# {, |' l8 n3 v- \4 d
reproduce' e4 L" f5 P3 g( Y% n
check-death4 u. s1 @1 R# i/ f
regrow-grass
+ `7 o0 C: L3 O$ W/ w! d" B9 S+ T do-plots. P; I. g5 E5 T* t N/ \
end
8 B- E0 c; C( L6 `: nto move-turtles i; A9 g" B; F
ask turtles [ u" G4 f2 c, F7 q! _' L+ p
right random 360/ ~) g2 R) a E
forward 1, T5 V5 g7 u, p1 f8 A% X$ S$ A% i
set energy energy - 17 C3 t F3 @: H$ k: k [+ V c, f6 x2 Z
]9 G. D' n6 W. i4 z5 L
end
. p/ U1 x2 ~% \% B0 q- E$ Pto setup-patches
. g4 K/ b* g# O5 R3 c- I; E/ s ask patches [ set pcolor green ]
1 H/ A& \( h# i+ l5 Q$ Aend
, ~2 x# C* j; Q" [4 vto setup-turtles
0 R7 a6 A' v- z! W- Q2 N( q create-turtles 100
8 ^3 R& g2 A n' j$ j ask turtles [ setxy random-xcor random-ycor ]
7 O3 x9 C, B. X2 p4 \7 send: V1 L2 `& a$ V9 p
to eat-grass
, w7 {+ P* |1 T- R ask turtles [# f, b# ]. [6 n- G- j* C0 l2 i
if pcolor = green [4 e* E2 x- B- i. s
set pcolor black
* V# l$ |* L, N5 v set energy (energy + 10)1 v5 m/ Y6 S+ \
]
5 k0 W2 R- ?% }" I2 b ifelse show-energy?. j1 O! M3 C) n4 ~1 A' [8 G. J
[ set label energy ]# C4 H8 w. o* J6 Q: `$ E
[ set label "" ]- Q5 U {/ J4 l: D8 s+ a& U
]8 y7 v1 M$ f* `% N8 b6 j3 t
end/ D$ |! u0 R( N- g1 w$ ?* H
to reproduce
6 p/ G1 T( J( p3 B9 P2 R ask turtles [
) a: W$ O. R6 x \ if energy > 50 [3 K4 d) ^2 Z9 h2 ?0 e! }# A
set energy energy - 50
- P8 v7 L7 h. g2 Q) H hatch 1 [ set energy 50 ]
' k" l6 C7 K; H0 M" r6 ^; | ]
' I7 B6 g5 E" A ]. r% ?- N6 x1 c* q
end
1 k/ x% J3 C% _" i) c( ?to check-death# F; V) u% `7 U/ u, ^
ask turtles [2 _2 t* p3 K& m" i+ G+ @
if energy <= 0 [ die ]
+ n- { \# f) |- a5 `8 W' {- I ]
* A: ~# o/ I" z* Gend
4 A5 n- x3 l, kto regrow-grass* `9 t5 Y) z5 X* ~' ~4 U
ask patches [
* J6 t& R+ u" J0 L if random 100 < 3 [ set pcolor green ]7 y& `# z" d/ k' {& O* o
]2 |, k- b* T! {4 `
end
# K- _. o L$ U# p$ Eto do-plots
1 N7 @% t$ D$ E8 @" l) l set-current-plot "Totals". J: @7 I1 F0 R C) P) e# y' X
set-current-plot-pen "turtles"# [& r( e9 j3 X% J7 C
plot count turtles
( [" G* r5 K2 b) p! \, ? set-current-plot-pen "grass"$ ]2 X7 {1 {8 h. }: {
plot count patches with [pcolor = green]2 A- a: y; t+ R5 Z
end/ R4 ?0 }( ]0 x. a& a, i( G
可是运行时提示no such plot: "Totals"
& n N3 N( k2 r7 O8 S- xerror while observer running SET-CURRENT-PLOT- N A( ~ ^# M
called by procedure DO-PLOTS( Q' ?$ n& j3 E/ ?# R( g
called by procedure SETUP
5 N) d) l e6 N. n5 }' G called by 按钮 'setup'
; O7 ]; D1 P4 Z1 Z' `1 q# b8 N求大神解答啊 |