我编的程序如下turtles-own [energy]
, A6 y% R* q* h A. mto setup3 B+ {$ }8 U( K, M, E
clear-all, N: u4 z' }% P8 P f, R$ N
setup-patches+ q% g" n8 D' P- a& x& L* z
create-turtles 100+ T! E! k7 V% v" o
do-plots
- o8 g1 g6 N0 b1 [) ]$ E% ]0 L ask turtles [ setxy random-xcor random-ycor ]
% J( d. _$ ~- n+ I$ m1 u0 ~end4 h" T( C* l2 f& P" N0 Z) o
to go1 p: L8 F* j# b* D
move-turtles& b2 T7 r# D5 M r/ `: L
eat-grass
( s z/ K ]7 v+ \ reproduce; Y* M4 t& n2 |0 \1 V+ E; C
check-death
! b: E1 A1 o+ n( d( r s regrow-grass' B# r- ?& D' W2 w
do-plots" I) q0 B9 x# p! G- n2 r: v
end+ I p3 k2 a5 v# P. J* w
to move-turtles) K* l% b4 @3 F( O }. `" I" G
ask turtles [+ I1 a; }, n, g0 x% y, K6 `3 q- A
right random 360
2 M. _5 I6 T* d) X6 F: n! V" M forward 14 f" {% v. o* k! q% a
set energy energy - 1
/ n' A( X2 `1 O/ }( Z! `0 E1 Y ]+ `# t* c( [* K; }
end
/ F9 ]- _- h! i3 qto setup-patches/ ?! P$ o( _# D# H3 |
ask patches [ set pcolor green ]
1 L" b% U4 Y* l4 y9 ]4 |7 iend
! Y% q$ T$ m! k/ I1 O* a& Lto setup-turtles0 w7 n. E# X/ Q7 a1 Y9 t- M
create-turtles 100
& n) v: I2 i1 ^8 m& ^( o8 S/ u ask turtles [ setxy random-xcor random-ycor ]
% R; }" p N& Send
" X8 M2 Q2 u" \6 Z u6 eto eat-grass
3 K' g( h8 B) K& Y+ C1 d ask turtles [
, G. j( ~8 d5 H$ G. d$ c( ?5 z9 a if pcolor = green [( _+ U8 m2 E7 m9 o
set pcolor black- j: ]$ l" Y. ]& Q+ S1 Q) {1 p
set energy (energy + 10)1 z2 \+ b6 |% g# q2 ?: F4 R7 b
]
5 f" W& I; o3 N! J& p# n ifelse show-energy?" U( G# ?% u% q/ v2 D
[ set label energy ]
5 X ` n! J l. Q [ set label "" ]
+ w- [. R+ t* g; M ]& Y) e6 n! J' F2 ?
end
0 S3 M" y: B* nto reproduce+ Y3 H0 q3 r5 z2 M; c
ask turtles [. R6 |% e1 k$ o% F
if energy > 50 [6 l& ]) m- R& q8 w
set energy energy - 50
% g* z/ a/ i6 d- E. W% L hatch 1 [ set energy 50 ]0 |0 e$ A/ F9 d j
]
* ]. ]9 B% J* T b' S ]
. l( Q0 o& w% A) B: x* R: mend# q5 W8 q9 ]4 o5 w9 U, |* `9 Q
to check-death, @% i2 g" D/ y$ ?1 X
ask turtles [9 l. n3 a/ v* q% \2 p3 P' N
if energy <= 0 [ die ]5 a$ h: D/ d/ A5 K o$ S3 w# p& D4 E
]
5 S, c3 U0 a1 M/ l! ^) Yend
5 d1 `2 H. f' @$ |to regrow-grass) m% n$ d) X6 p* A
ask patches [
! B8 R& m/ F6 j5 Z if random 100 < 3 [ set pcolor green ]+ X* `, s: {* B/ M9 m3 Z t
]
" v+ w9 z! z& Z `9 v& Y' Bend
" h& I w* V2 G( i. S4 Mto do-plots
" ~: ^' b! p x7 |4 ^0 R$ R set-current-plot "Totals"* L; R- E2 d+ f' T, Z, a3 k: d
set-current-plot-pen "turtles"
# F- M! D+ c" V+ W plot count turtles' t3 `, ] v; q; M% @8 R
set-current-plot-pen "grass"9 x8 Z* \( g1 y5 u) f. i) Y
plot count patches with [pcolor = green]
- K; e+ F7 n/ M6 ]2 E& B7 Oend
2 @) Z) \* V' w3 n: T可是运行时提示no such plot: "Totals"3 X2 e- P7 g; v2 ~
error while observer running SET-CURRENT-PLOT- A) M' ?0 j2 @3 P2 ]8 {
called by procedure DO-PLOTS) u; @7 T) q# e+ |
called by procedure SETUP- ?/ N) u0 b# S
called by 按钮 'setup'2 _ V) x! X( [/ r' n
求大神解答啊 |