我编的程序如下turtles-own [energy]
% L2 N4 c) h% C0 a3 Vto setup
: Q8 p" N$ n* i, u clear-all
" A a% B# r' M/ v setup-patches% X: l+ X2 p8 @2 n- o' l
create-turtles 100- V& |" J) u! x
do-plots
1 v- q O, E* l ask turtles [ setxy random-xcor random-ycor ]
% x) B4 k2 I3 S, [. n9 I7 u% Mend
7 X4 d! ]0 f% sto go
7 e. I( i( L# X move-turtles3 g, c/ G7 f# Z# [
eat-grass
* _7 I y3 R+ c# {5 O reproduce; C+ I8 V' H) M+ R" B4 b7 V
check-death9 \; j& Z9 {0 \5 S: ~7 S; N8 w
regrow-grass
( I U2 |+ z7 t% Y do-plots
0 J. c3 `7 P4 w! y" m8 T- Tend1 q& H9 r5 ]: q ~8 p& X! R
to move-turtles) ? S# v% H8 {6 Q4 g9 q
ask turtles [
' p# R2 y, {# E6 k right random 360
% A: b/ u7 X$ k2 U$ u$ | forward 1, B4 I9 s4 A7 s8 U. ^* R0 f7 Y: R- M
set energy energy - 1
# w2 c! a- R% w: A7 t- W e1 X ]; X# r9 ^# o5 [( H8 [- s: w
end
3 F( X* C, Z* J- }/ c9 W( L& Nto setup-patches, [3 A9 i+ P, }2 y4 D: s# {2 P# @
ask patches [ set pcolor green ]
- c6 c' z2 Z# n% f- send
9 H9 f& y9 E2 F1 R' oto setup-turtles
3 N1 u. T% t8 {4 e0 f& C4 v create-turtles 100
: @- ^! M7 h$ V6 Y/ {7 e ask turtles [ setxy random-xcor random-ycor ], j. j2 M# t1 d8 ~3 J
end4 {9 Q! A. \5 |- p- N
to eat-grass3 j4 h( z/ j2 c, r
ask turtles [
1 L8 F5 F* C: V9 X5 Y4 p9 a if pcolor = green [
/ z, C/ |8 K. }. g set pcolor black. ?: c* C2 f9 v$ C9 i
set energy (energy + 10)& g$ ~. S" C0 k" h& I, L
]+ }- e. U- X1 }4 t
ifelse show-energy?
}5 B& A; o/ R5 o P7 l, `) { A [ set label energy ]8 ?' d! A: K% r1 e0 H! W( T& y
[ set label "" ]
4 {; I/ f: u4 r# N ]4 [& }$ d, @3 r: }
end. p- H- C1 p H; V5 y+ r
to reproduce9 \8 F4 ?% T6 M1 X
ask turtles [4 T. X4 m# O; p/ o/ C \$ Z
if energy > 50 [
+ ?: |" I* U9 L$ [& X; H a set energy energy - 50
) o" |: S, p: z( u$ e3 H hatch 1 [ set energy 50 ]
" M ~4 Y: E6 m7 z ]
3 t, z2 d4 x* ]. D9 z ]( B4 o& Z" H9 B: x" i4 q- |
end
& U" U# K9 B" _6 Eto check-death2 w, M( W8 p& [" _6 {1 a3 c
ask turtles [7 d* Z5 k, q4 ^
if energy <= 0 [ die ]
( _2 M8 m8 y, H; ?9 d ]
G; s1 F& |& Eend \" @$ ~& E7 M/ ^! {
to regrow-grass9 w2 m0 A1 H( w3 x: [' t1 C
ask patches [
; u, @; I7 H$ {* h- n# x6 j4 Y9 C if random 100 < 3 [ set pcolor green ]( f6 `& k! {6 `- ?, u
]
, [. |( o1 ?8 u7 }4 }7 Z2 ?end% N! y# N# S A$ _- H& p+ E1 a
to do-plots
9 m3 ~& u9 E2 h' e set-current-plot "Totals"" N4 f, ?9 {6 F0 Q+ i3 e3 W
set-current-plot-pen "turtles"
: V9 D+ p5 I. Z6 U6 ] plot count turtles3 V* d' O1 N- Z+ R, F' H; |
set-current-plot-pen "grass"4 H. s! y* W& D( f U: b+ {: i" g
plot count patches with [pcolor = green]
, B. J! r" \& e, I5 Bend
T; ~" j, O; d7 K, A可是运行时提示no such plot: "Totals" b& n) C; ?8 C) f
error while observer running SET-CURRENT-PLOT% I3 Z# x0 X, }* t3 k: D
called by procedure DO-PLOTS
3 R3 ]0 O7 u( y$ m called by procedure SETUP
# `5 w7 i. K" Y2 y a2 s s4 P called by 按钮 'setup'
% G/ A0 G+ M0 w* S" q, `/ u求大神解答啊 |