我编的程序如下turtles-own [energy]+ d) a. e/ o/ ^; c v9 Y1 y8 e: G$ [7 y
to setup7 U2 e( S' f7 p9 Z) F
clear-all
) p4 q2 v3 d* W7 ~! \ setup-patches
- |4 X* O" P+ N G& G create-turtles 100
$ W1 f) _; y d& ]! z8 z6 t do-plots
# ~% r9 n$ `+ h/ e% _* q ask turtles [ setxy random-xcor random-ycor ]5 `" x6 B+ t8 M& R' S' G/ v
end
$ y& T5 c' l l+ q0 bto go
. u# i# O! C: B4 T3 w move-turtles
0 ~5 M% }$ X$ h, v, Q eat-grass
7 P: m" p% [$ {' { reproduce
$ T# a4 o1 h. r% D' M check-death
. k. E4 @ t9 t* Q/ {* r regrow-grass9 ?, B' s r* a# w* G7 G6 {
do-plots% n2 U% W3 m$ n. [5 d& I5 h1 R
end
- k* {* ]) U. ?. @to move-turtles
$ [2 x7 _4 U7 D! n8 x4 m. [ ask turtles [
/ }0 n6 v0 c$ X& s8 @ right random 360* u* F, x8 c; m, ]1 M! U
forward 1
P. p7 t: V- B# C6 @ set energy energy - 18 ^5 l9 {& u+ F* f6 `3 Z9 `
]
; k8 I \/ i5 y8 fend3 K) G0 [0 y+ ^+ o, W+ l; D* K# ]$ y
to setup-patches: c( a7 c d5 f! ^, x6 c
ask patches [ set pcolor green ]4 G1 J' l& ~ [7 q5 {
end
" R1 ]2 k/ l6 e$ k1 Oto setup-turtles5 o6 _: {* X. I! N% ?
create-turtles 100! o9 r; R3 T/ u, V+ @5 T2 v8 ~
ask turtles [ setxy random-xcor random-ycor ]7 Y- i/ f! g: n9 e9 s* c* ?/ f; c4 j
end' G3 `+ m# p3 w3 M' t- f; c) @
to eat-grass$ D% |* U( F0 u, A
ask turtles [
- i/ S% ]0 d. u* B1 r% Z. b if pcolor = green [
4 L3 E0 M, D) K) \ set pcolor black
/ o q- Y% T/ K+ F. b& i set energy (energy + 10)
9 f/ l5 s* m3 c4 G) n6 c, d d+ T. l ]
) u0 ?6 M! t9 M0 o1 K ifelse show-energy?
' e3 `$ V& Y0 G [ set label energy ]
) D' @- j4 o' F" p+ ~: P6 {! h [ set label "" ]
" S. |9 g- {( ]9 C1 i/ F ]
8 Q% y' h" w* S* i$ B' V0 Aend
7 \+ J3 r) v9 V' k8 |to reproduce* J0 m" ^6 ^3 f8 j, U
ask turtles [
& x" k5 t& p8 Q, H+ A4 l0 z if energy > 50 [1 _& Q: p" Q3 z K0 g
set energy energy - 50( }) J' L" Q+ g2 h! v
hatch 1 [ set energy 50 ]
7 H4 g! q5 L% q9 w ]
% i b' [5 [% o9 x5 T0 ]! h% L ]
$ n( \8 [- y* I: G, F- Hend# Q& J; X5 I; K. H
to check-death
# s. Y3 m, e1 ?% C, E2 ` ask turtles [
& x& @! T( _5 G8 H if energy <= 0 [ die ]3 ^8 [/ v8 x- D* N
]* h2 S! H- g* U8 s- o/ |& X
end
$ C3 E M5 |" dto regrow-grass+ v$ Q3 d2 C& a8 ?1 B
ask patches [7 w2 a) d! f6 E K* S- ~' m @
if random 100 < 3 [ set pcolor green ]4 ^2 t2 n/ h- y9 C) z
]
' d- I5 ^9 {3 ^! ]7 f# D2 C8 Pend
% R* P( c/ u: f' X- O+ X. ito do-plots' {" G9 N5 C0 f$ z& a4 n3 T
set-current-plot "Totals"1 E, p0 ^, j4 J K: a4 S2 `
set-current-plot-pen "turtles"* z5 g) e6 @2 W0 B* v/ o6 G. C! c
plot count turtles9 _" O" q7 q$ T7 g% S) H, Q
set-current-plot-pen "grass"
) y6 R7 {8 F4 y4 F4 A- U7 {7 m2 A1 U plot count patches with [pcolor = green]& r: C. j- n, {& ~% A
end- e g. M2 X+ y4 _6 O
可是运行时提示no such plot: "Totals"1 g) L: h8 [5 t" J$ o9 h
error while observer running SET-CURRENT-PLOT, G: [* {1 {, Q$ ^8 V- C
called by procedure DO-PLOTS
4 B* P( R1 ]; N. ` called by procedure SETUP
% ^" U7 T- p: L* o. {* ^2 g called by 按钮 'setup'
" w" g% Y: E0 ?; q9 k/ c M( x求大神解答啊 |