我编的程序如下turtles-own [energy]
4 }, B1 N3 G; Uto setup* Q6 s' `& ?) i' f
clear-all
: c5 z1 I5 b9 R& d+ J setup-patches1 H2 y, W9 z) L5 B4 ~/ r1 R- {
create-turtles 100/ g3 ^6 m2 w/ S4 D( ]
do-plots, n, b Z$ ]. `$ f
ask turtles [ setxy random-xcor random-ycor ]! s% m" b' @* U! d3 v; `
end
8 l1 Y$ D% P3 r9 k& |8 a- Wto go4 U' m# g; y7 L. H+ j
move-turtles
4 U: |! r4 J8 ^7 I: V" U, z) H: n eat-grass2 B# h0 ]! E6 V
reproduce* |1 n3 i) L4 K7 [4 o2 ?0 x% y& ?
check-death
* c7 E- P: x% X) P. C# J2 q% o regrow-grass% D* E3 Q0 I5 C+ P g
do-plots% b/ @& m" b1 W" p& R, f4 k1 M% d
end
/ f* X0 ~8 q1 `to move-turtles5 e: t) c. H/ ^" Y, \6 d
ask turtles [( o6 i* b# G% b7 ^
right random 360
4 _ u: `2 k3 W8 v7 N* g forward 15 c$ n/ n) u; G( A' C
set energy energy - 1
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' M" I# N/ H( ~2 c8 aend
B/ K6 ?! O( xto setup-patches z |8 o6 j0 c
ask patches [ set pcolor green ]
% l2 k5 `( \* q# L. a+ k% o% Y4 Rend/ L* n4 a7 q9 o
to setup-turtles3 N! e* j4 S2 X% B# R0 k
create-turtles 100 s, e, \' z k+ X- c& F
ask turtles [ setxy random-xcor random-ycor ]& g* D: m6 w/ }% D }" I3 t. Q
end
1 i1 }8 l" K3 C5 Q* Mto eat-grass
% {0 O" T5 H! V8 K+ D) T1 G; @ ask turtles [
8 J+ L4 m4 v- i8 f, a* m if pcolor = green [
0 @$ l5 P: C, d8 }7 {6 p' `) d; w set pcolor black
7 m4 n; i1 v6 N# f3 r$ D1 T set energy (energy + 10)
$ y' K1 [1 [0 K0 N; \+ g ]
( C9 B+ t" t1 {) h$ o ifelse show-energy?
2 q; B% ?, U& F5 L8 m [ set label energy ]- \& k2 O- h" r- o3 L
[ set label "" ]
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2 P, _: \+ v5 E0 f9 ?) I' T% E! Aend9 @7 t( V, M$ P8 b
to reproduce4 `' U8 I+ b* s; g
ask turtles [1 _1 g9 L0 g/ y7 \# X* Y A
if energy > 50 [: o2 v2 ?5 C$ s+ J5 m
set energy energy - 502 G+ }" x6 W/ e* E/ I+ `
hatch 1 [ set energy 50 ]
; j) }) I! Y+ n5 x ]
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end
5 R+ ?% D& e/ R/ }5 ito check-death
! w, y! V3 F9 X ask turtles [
% L& P5 {) H$ m4 J# H; \5 p$ ` L if energy <= 0 [ die ]
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end
) a( P8 q, F" T# Z1 l, r% i: yto regrow-grass( z* o. `( G6 y5 z e
ask patches [7 c; P6 [. k! E
if random 100 < 3 [ set pcolor green ]
8 }, P5 ]4 \4 B7 G7 m ]
3 K" O0 V! W8 \1 n1 }end
6 |5 |: L0 j1 o U. Z+ fto do-plots
. ^7 Q5 ^* V6 x& A/ H n set-current-plot "Totals"1 f, N' g6 t* R+ P
set-current-plot-pen "turtles"
) v# \9 K# a. M( Z plot count turtles( n# r2 a( p& R5 p5 O, X
set-current-plot-pen "grass"& c0 l' R! y; K" I# h6 q
plot count patches with [pcolor = green]
3 M* f7 S q8 {) `) Dend
. c+ N5 g9 F4 d# p- }6 x- ~可是运行时提示no such plot: "Totals"
1 H$ W- A9 o/ Herror while observer running SET-CURRENT-PLOT
% m4 q8 U2 e/ r3 B called by procedure DO-PLOTS
6 @- G# P5 ?3 a called by procedure SETUP/ O. g- C% m: M: l+ I# t. n
called by 按钮 'setup'8 w& T) Z) x2 Z: T: t+ K# s' d
求大神解答啊 |