我编的程序如下turtles-own [energy]1 ]8 I7 ~- s. m- |+ }# z. Q5 j$ k
to setup h# \" \& Z/ g% Y
clear-all
: J6 {6 k+ W2 m2 d( a/ ]2 x+ Q setup-patches6 }8 Y7 s- `- |/ j/ W; p
create-turtles 100: y& ^+ r v& t: o& j5 m/ ~6 X5 L
do-plots
/ o8 e8 g W: [, t; s ask turtles [ setxy random-xcor random-ycor ]* \8 z3 E+ B$ g. [
end
! ]+ a6 ]* G8 l7 N6 G, V8 j3 nto go
7 S, v, j/ c$ I& {& t8 G' v5 r move-turtles- [* H/ G& |9 M4 _" q9 h3 i G' f
eat-grass$ `3 u% X: m' b }# l! ^5 h5 s% Y
reproduce* d/ J; W; ]! Y+ A. H5 S/ g: z
check-death
* n$ C5 Q4 s" i9 N" V regrow-grass
( ^% I/ Y7 s! {7 Q7 I" ~ do-plots
( v+ f O1 w7 pend
, M; y" a7 r; a4 Z( V9 G' Uto move-turtles e4 w8 m0 \. p( S8 X
ask turtles [
/ |* U, R3 Z* N, e8 ~' h \6 t- I right random 3606 R' p" R0 p, O+ B) W3 `
forward 18 p# q$ P, O/ x; B
set energy energy - 1
; g( Q: C4 N2 O& o3 ? ]1 f _2 ~! ]! g. h5 c x
end m. y' [, d8 j. O# m& T' C
to setup-patches
' i& }* r/ t: I; v- R: z: S ask patches [ set pcolor green ]
R. g. ~6 y7 e9 F; lend
% Q& m3 c5 y |8 l( R4 H0 r/ a/ fto setup-turtles% ]! @1 Y8 d, I0 v5 {
create-turtles 1000 S3 g# Z4 T; Y' v% s
ask turtles [ setxy random-xcor random-ycor ]
! H3 k/ v) Q% R8 B, o0 jend' D6 J/ {9 p+ z3 ~
to eat-grass5 z+ f B+ q" W6 z$ n. W
ask turtles [$ l6 M5 P& b/ j4 @
if pcolor = green [5 A8 E5 |; ]$ Y7 U+ C A' ]
set pcolor black
4 {* m+ | p: ^6 Y, L/ {; h set energy (energy + 10)
2 c5 H$ q e' ^* x* j+ v ]
( @. X; i T% J5 y0 o% j ifelse show-energy?
5 [- d" ^; i; D1 I [ set label energy ]8 {/ q. |0 S2 z
[ set label "" ]) {! m$ T, q# Z+ A
]! B/ ^$ n, @# J# o5 v- V
end
8 q& ], w; l6 K; S4 _( ^( m" cto reproduce
# ^3 ~( y; z { G6 r' O ask turtles [' r$ T# A `8 G: S+ F- {- L
if energy > 50 [
: B' v9 n* C$ f G1 H" ?, g: o set energy energy - 50
4 X6 _3 I. g# \+ G hatch 1 [ set energy 50 ]
1 d; P x- F5 C# Q$ j: P4 Z, p ]
6 n, R$ `: O. [5 n( V, N9 m& W ]1 P4 G4 p+ b6 N
end
) e! y" p( c( [$ A5 I5 wto check-death
' X3 o8 I: j0 X; b. L9 J( O; ] ask turtles [
0 A2 F( F D1 w if energy <= 0 [ die ]+ L/ i; d5 o+ z. y
]& ?7 D T9 }( r; ]; o1 T( y; \) H
end% o2 c) ?# N2 ?* k; k( f1 p- o
to regrow-grass% S8 L5 \7 @5 p" A
ask patches [: G9 ^& j( i1 U* M3 `
if random 100 < 3 [ set pcolor green ]% d) U, f, u& z" A6 O
]
' q0 ?7 l/ n3 N2 Z5 Dend! y- }+ z* E" C( t3 q2 Y3 `2 W
to do-plots* m) y+ t- p l9 e& R1 K
set-current-plot "Totals"
8 i- K4 l! q1 }8 o2 k3 o set-current-plot-pen "turtles"
1 |. k3 l; s1 d/ }' X plot count turtles
/ @" g0 P6 k4 ]' i7 K set-current-plot-pen "grass"" x% q% T- [# c' O
plot count patches with [pcolor = green]
7 @. ?% x, v$ nend- }) ]2 v/ S! R& W6 R! {
可是运行时提示no such plot: "Totals", U% G8 d: k: q7 Y1 r8 i' N2 A7 x
error while observer running SET-CURRENT-PLOT
4 k) c; I9 _6 f called by procedure DO-PLOTS
6 K7 d: b6 V& H2 n called by procedure SETUP, r; a2 y4 g. t8 v0 _4 d
called by 按钮 'setup'9 _' K$ W; j# ]; X' G: B
求大神解答啊 |