我编的程序如下turtles-own [energy]
( {4 @. `0 I' Gto setup# B9 z7 L3 \: \- y( B% F( T
clear-all j7 }0 ?) K. L; }
setup-patches
5 x; W* z: y+ o8 T% @& V7 \ create-turtles 1001 k1 y) ] D+ t: A6 @
do-plots
L1 v' z9 B) P E ask turtles [ setxy random-xcor random-ycor ]% `+ D' g f1 n- \( u% J
end6 N' W7 i8 ?& T: h: ?
to go
% E ]6 T* w3 X! f move-turtles
/ x7 H# R/ W4 p2 h0 d3 M$ R eat-grass% G* b6 f8 t& q
reproduce
3 {3 [; h/ @1 n! S6 D! H/ X$ [5 u& K: L& p check-death
$ p A* Y+ O3 y& S9 G" c regrow-grass
7 k% D, Z( q: z. m7 G }4 X1 h do-plots; e. z, G+ ~! H& F# k
end
. u. s g$ j9 T1 D& ]* y# J/ Tto move-turtles; E/ d6 V9 W8 ~6 S* V; J
ask turtles [8 N0 g0 E8 R/ T/ B1 a ]
right random 360
# w3 ?7 [/ F/ ` forward 1/ [! R) P! m! y# h' H8 s
set energy energy - 17 h: Z% v; C a- N
]
# \/ ~/ x; d8 [5 `. qend
" `8 \% @ W! W% k+ N" Z% _0 _to setup-patches
) S; Q5 d3 R" G# X Z e# e) { ask patches [ set pcolor green ]8 p% Z: L* l3 s) Q6 D! ?- n3 w. i
end3 `6 _* A0 C. J8 I
to setup-turtles
; [6 k- k# p7 o4 v* j# C create-turtles 100% I, P6 Z7 }( J0 |; C
ask turtles [ setxy random-xcor random-ycor ]: i D8 @6 p3 \2 `& i" j
end
) H, y: N. `3 f, X2 zto eat-grass
- D) v1 Z l; l% L ask turtles [* Y. z0 M$ j R# z! I. S
if pcolor = green [
) t6 B9 A' E \2 o7 h* S9 Y9 | set pcolor black
3 J& Y" `0 h, ~" k set energy (energy + 10)
7 f k" Z3 M6 z5 T ] V5 p; q" S5 P
ifelse show-energy?' K- e8 o, V/ C. k! _* l5 F1 w8 I
[ set label energy ]" ]% U$ ^+ C# ]/ O( [+ c
[ set label "" ]
( ^ w! X9 T& T' Y! M1 v" P ]/ L. d/ [9 y. F4 T& @8 \1 m
end
+ v( |; `$ C6 L7 ]5 G+ \to reproduce
' y6 G8 Q `- W* B ask turtles [
; P5 o8 c) V+ R z$ e if energy > 50 [
9 g$ `6 |2 m, S7 } set energy energy - 50
, C$ N8 k7 P8 p9 C% j$ ? hatch 1 [ set energy 50 ]
+ o4 s: c, n: j/ X4 u3 D ]
. A# T5 Y7 Y2 f: H5 L7 v+ g ]
# G/ A% F& q/ d" A2 L l; _6 |' L; s" Wend ]9 ?/ p `5 l% q& Y5 t) A7 h+ ?
to check-death
" V6 h# K# m2 X# e) l; Y& @ ask turtles [
& y; [5 C7 j* \8 g/ ]6 R0 L if energy <= 0 [ die ]
: F+ Q; J% ?; F) j5 D8 M ]1 y* k) q; V8 M( T
end' U' i$ {. ]$ e v) g, ^
to regrow-grass
. m/ ?* A6 P( S2 v ask patches [& K1 `7 V4 n" C4 p% p7 |
if random 100 < 3 [ set pcolor green ]0 o$ J7 \) [, ]- ]7 w7 }& R
]# J/ L" j0 m2 c% u
end W6 c$ |- f0 p4 l
to do-plots
8 v* C' |% o: T; P; [4 |* L; H set-current-plot "Totals"- ?" J' S$ a0 o" H$ x) G
set-current-plot-pen "turtles"8 K2 c$ h3 {$ h* n; T0 L
plot count turtles
. a5 S) L% g M3 j/ ^+ L% i; n, z set-current-plot-pen "grass"
7 x- `+ Y6 l9 J: p) _ plot count patches with [pcolor = green]
* B& ?5 t9 S$ J& ^" Iend
# |% ^! X' L: U$ W可是运行时提示no such plot: "Totals"
* w3 `8 F! ?5 cerror while observer running SET-CURRENT-PLOT9 Y. a4 T( H% ^
called by procedure DO-PLOTS
9 V. e) J2 A3 P called by procedure SETUP
# \5 U" q' M9 F v called by 按钮 'setup'
9 x* k# R) O: i; z' W求大神解答啊 |