我编的程序如下turtles-own [energy]! ~9 l" e$ c2 A+ x& n- |8 |! X6 I
to setup
; z- w$ W8 [4 h" [/ @ clear-all
0 a: e( |4 T, o& i1 e) z setup-patches
3 @* M1 a4 x3 }. J6 { create-turtles 1001 K4 K! |0 Q2 R/ z+ R) @
do-plots+ n6 l ?! {* n8 } ?% {
ask turtles [ setxy random-xcor random-ycor ]
/ D- x6 b+ E! { w5 K( Kend1 S4 l* i! T; s+ k! B' O9 G
to go" |- ^! f. |3 ~9 K+ w
move-turtles. r/ v/ Y! d5 `0 N
eat-grass
4 R3 M: s8 }6 e% {& Y reproduce
. i4 z! {) N" [4 s% r check-death5 ~1 V- X/ h' f/ X, }
regrow-grass
7 X$ s! B: B" x- L do-plots: B4 ^. [! g7 M9 f4 |
end
8 ]1 ]7 M. H* f4 P" y0 I. Ato move-turtles! @5 [% Q! m- x* }$ m, X
ask turtles [- W& P& S6 H' @' n2 d! ]* I0 o
right random 360/ w: g. v' V- D# f& b4 e
forward 1
0 s& e) M8 ]; \- d8 Z set energy energy - 12 y- {& B9 |6 F% Z
]8 t1 A A8 d1 `" E
end) a: T1 E0 M+ s0 c* w3 T8 i
to setup-patches
# v; Y, s' [) h- P$ k- O" o5 @ ask patches [ set pcolor green ]- i& ?% L8 l/ B+ { H; U5 ^
end! R& w" t. t/ S5 X$ G# X
to setup-turtles
# V0 a" G9 Y9 H, C5 L6 C7 T create-turtles 100
1 z4 D9 c6 B( m ask turtles [ setxy random-xcor random-ycor ]
; m/ q8 C! M! Y' Dend- T$ N) d+ o! o8 I; P5 {. }# T
to eat-grass- u+ D+ K7 p: w* l! ]% k
ask turtles [
; P9 j( }7 p b5 c. o if pcolor = green [
$ @. y& D5 u! \0 |$ l P% } set pcolor black# J4 L4 W" R, b# J# c% Z; F: N
set energy (energy + 10)- t3 q1 q7 k+ I+ h+ e n( S
]
6 `4 e7 X1 X9 S$ D: G* j8 V2 D. v/ r# W C ifelse show-energy?8 A, K# D* w1 h3 G! a
[ set label energy ]1 }$ D# S" G" _* D- B
[ set label "" ]
$ a) E0 k, S8 k ] _: l0 Y0 K; I8 v% F
end
4 z8 F$ A* |' A! O/ R; mto reproduce
. V4 L; u# ^8 B2 y/ X ask turtles [
$ g! Z0 z8 Y6 J+ D if energy > 50 [( D, A. k8 \) z% E' ?
set energy energy - 50& I5 Y$ {1 E* |7 H6 A) N$ N3 f, [! C
hatch 1 [ set energy 50 ]9 d: M, O$ i) ]( f& a
]
+ I) F# C$ r0 i& ?/ w ]7 A7 I! }0 n3 k/ S/ o7 K
end: J" Y2 j; x! E
to check-death
. n/ w$ S3 s+ _" X$ s ask turtles [
7 W: S9 ~+ |( l3 K) N if energy <= 0 [ die ]
4 K; X4 z1 i$ i! t7 |' T ]
7 o. S+ v# t! G, V! [end
N: I% h( @7 v. L. Wto regrow-grass4 e$ d& c1 a; n! c0 ?! e) u
ask patches [# m6 w( t3 A e! {, W
if random 100 < 3 [ set pcolor green ]
# h. m2 M: Y- f5 ?3 K3 i ]
5 R6 N7 c) P V0 vend
# r6 |. V9 p1 tto do-plots
, d; y, i" a, W5 @3 j0 r8 y set-current-plot "Totals"; W9 Z: m( q9 I7 i) R
set-current-plot-pen "turtles"1 r; i9 I: x0 e
plot count turtles
: D0 Q, `+ R/ o set-current-plot-pen "grass": d7 Z/ L9 B5 w4 r1 h
plot count patches with [pcolor = green]: X" S* i, p5 }, F6 }4 ]; u
end
) G6 B- T Q7 c% g可是运行时提示no such plot: "Totals"" b: L. h/ L! s1 n: y. k
error while observer running SET-CURRENT-PLOT
4 w" w4 G1 y, l% s C" k) D/ o called by procedure DO-PLOTS9 B$ S8 _& m. C# G3 M- R% b6 H. B% e
called by procedure SETUP
/ e& a9 p* e+ d) p& E; l, D called by 按钮 'setup'' e2 n* z \$ \; ^
求大神解答啊 |