我编的程序如下turtles-own [energy]4 {% J0 [- D" P6 d7 Z
to setup' _' {4 d) L5 A/ _; G! `
clear-all
7 }0 X; K: g) o) _% ^ setup-patches
& i* z6 h5 m8 Z$ O1 m create-turtles 100+ d |/ a3 |9 r9 @0 q
do-plots
- m9 E3 y+ Z2 H+ b ask turtles [ setxy random-xcor random-ycor ]
& ?( g5 M' _: O- Y# X4 D( Dend
/ K# L. X: K0 p9 P0 yto go
8 N$ w: h7 P- T6 Y1 B move-turtles8 {1 Q/ C5 z. v8 h/ A
eat-grass
4 U' ^- G; W6 a: z) i) I reproduce
; y; s" s# m5 E( C check-death- _! S1 T- s4 Q0 g2 d9 u
regrow-grass
& s7 l! L) q: ?" z# d7 c do-plots
# H/ g; L; @) ]' Hend
+ G: w$ H/ s, d4 ^to move-turtles
$ g p9 V2 c5 q. U* x9 d ask turtles [" g; R# J2 `, d' L
right random 360
( j! a& R! O% D' ? forward 1
, N) }) `) Z) [% C0 Z9 | set energy energy - 1
8 T4 J0 G; F, e0 a4 q ]6 p# N/ T9 C( W" ^. s
end2 K6 J2 [. G% r0 l, I( I
to setup-patches1 i: H1 f* K2 _; C5 B0 i' }
ask patches [ set pcolor green ]
' `: t- a' s+ q: f$ s/ Xend9 e" L# A% }8 r8 Z5 M5 d% ?. `6 Z8 F
to setup-turtles
9 t! Y& ?, W! Q" I; Y0 V* \* J create-turtles 1008 t+ W' y1 c( \3 F& q& k P
ask turtles [ setxy random-xcor random-ycor ]
* c, U0 I, S: |: Jend5 A7 M3 x M2 i5 j: Q
to eat-grass
. r8 s8 M, l$ X) ] ask turtles [0 A8 S5 n$ H! Y. C8 l& v$ Z
if pcolor = green [
7 u: y/ L! i$ z7 g set pcolor black6 o& ~: `# L" u( S. G
set energy (energy + 10)$ A) I! U3 f4 @4 S' `$ o: V( \
]( r2 p* \! U& U- b2 U
ifelse show-energy?
7 ^3 \- H) X; ~: w5 {6 o [ set label energy ]6 ?" Y+ f5 G( T4 b3 [# c
[ set label "" ]2 e% p- v2 w) y2 n+ e" S. y8 \
]
' {! }5 U& \& n5 Dend! G4 E) v. ^. T' `) Y4 `3 b4 E
to reproduce
7 t! L1 N; b, Z* s) p ? ask turtles [
* X4 f: ^1 e- R$ c. L if energy > 50 [5 n! j- y J5 O. X! T9 \
set energy energy - 50* `! [4 x( ?, T* x' s' T C, E
hatch 1 [ set energy 50 ]
( y6 O8 R. k7 _# K, W% p ]" G$ V7 e! E# o6 H# W" `
]
, f1 _# U0 ]. ]7 |$ I* @% s1 tend- i+ b' s2 ^. ^7 G
to check-death6 K/ E& |+ a4 h V J( x0 H/ u
ask turtles [
% h4 q4 X5 U7 F0 n if energy <= 0 [ die ]# ` ~! U0 T4 O
]+ r* r) {: O h+ W4 Z
end
4 b; k# M3 a1 Wto regrow-grass1 N: y3 s( V- H$ u$ c
ask patches [
2 Y7 i. K" J& Z8 ]% n if random 100 < 3 [ set pcolor green ]
/ O6 |# Z. n& ?/ h ]- n3 r# e- F' K
end
" f$ ^# x# S: O( ?' P8 Y; A* fto do-plots+ n4 X" k) }, X# B) |
set-current-plot "Totals"
$ [2 [) ?& \' Y1 J set-current-plot-pen "turtles"
( |5 l# ]$ n( M8 W" X) ^* b. m plot count turtles4 v: P) n& a8 |/ s
set-current-plot-pen "grass"/ u4 }! N1 a1 r' ?
plot count patches with [pcolor = green]
! O" J% D2 M' H& D0 Z2 n3 Lend
' ^9 v7 M7 u+ Z! B1 i9 }" ]) K可是运行时提示no such plot: "Totals"
( F' ~4 S3 o. I3 d% e/ uerror while observer running SET-CURRENT-PLOT
: l1 Y) G9 x! Y, @% t called by procedure DO-PLOTS0 C+ D; W, F0 y- _ y
called by procedure SETUP
3 W: |" N6 A: \# N1 j called by 按钮 'setup'- p/ Y3 Q$ _% k: A- `( `
求大神解答啊 |