我编的程序如下turtles-own [energy]
0 V. f- V0 ?/ f" ]$ Dto setup, v1 D8 T+ }" k v
clear-all
8 W/ `& U0 N9 P6 y setup-patches
& o/ `' R5 Z* I+ ~# n+ t6 b1 i* z create-turtles 100 \$ y+ O$ B! N$ i4 f W( |
do-plots
0 e5 e3 Y5 M+ d9 y ask turtles [ setxy random-xcor random-ycor ]
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to go
- h- J: @- H7 J% T+ b) q$ f$ p move-turtles6 A9 m2 z! D+ |
eat-grass
- u6 e- ~6 }; g reproduce
8 l& r; D6 `; S3 X1 f& a; V! u check-death, `4 [0 |: Q2 D* x+ `: H
regrow-grass1 f/ I- N1 W" B
do-plots
/ Z% i6 R J2 C8 h% Rend
0 i& c s$ Y: b8 `to move-turtles
* O! {7 ^( I% L1 H( r ask turtles [
7 U+ g- L6 E% f% T5 k" S3 g right random 3603 ^: w; g/ k& G
forward 14 P( n# S$ e, \0 d1 P& ?6 U9 f
set energy energy - 1
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end" i. Q* t* Z, D+ N5 G; ]; X% r) k
to setup-patches
% I; V5 Y6 Q F7 k: ~ ask patches [ set pcolor green ]
) U( G1 C# q J, ]- O9 s6 wend
( R. t; V- W, }/ V- }/ rto setup-turtles- ^% K( a: j% X; Y& h( P6 e
create-turtles 1003 I ~. s3 L; ^, t3 U. M0 R
ask turtles [ setxy random-xcor random-ycor ]
5 r+ s2 A# k' O+ x2 P0 e' zend* H* l4 o) v6 N% F5 X/ B
to eat-grass) D; I. [7 y* J) {! o8 X$ J& p( U
ask turtles [
" i* @" A* W; b' ?( p if pcolor = green [+ E! B: U( `/ ~2 c; U
set pcolor black8 O* i; d" K8 V4 k. w
set energy (energy + 10)
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ifelse show-energy?
' q5 e$ g7 W# K9 K" y+ I- [ [ set label energy ]9 T: p, Y7 t! l& S5 `
[ set label "" ]
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end
. l" k* T; Z" \) Z f4 `$ eto reproduce
" f0 y+ C4 m7 R% l8 O0 ], ]" C ask turtles [
. m: F- Q# u% R if energy > 50 [" M. P% i; Z; S+ H" I
set energy energy - 50
$ a( z+ c: W: P$ Y0 ^' C a8 _ hatch 1 [ set energy 50 ]& j& T. C$ I5 i! j
]
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end
. ~" s# E% M2 ]7 R6 ^( ]to check-death$ Y: w d& d) x7 `$ v, X
ask turtles [* J8 R) r8 z3 s6 B; L0 Y
if energy <= 0 [ die ]
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end
. A3 a* O: A: [4 y, ?/ T3 tto regrow-grass
0 |/ \/ I; h7 j$ }5 U; W1 |$ |' R2 z ask patches [
: }! v8 k5 \* t* A/ }& V7 h if random 100 < 3 [ set pcolor green ]5 a$ @! J& H6 c" `( g1 e! U! ]
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end
2 l$ c# G2 Q9 n" p" dto do-plots
' e8 D" A" Y* {$ [1 Q1 C: X set-current-plot "Totals"7 H8 P9 p9 M1 n0 e2 ~9 ?
set-current-plot-pen "turtles"& T$ D' m5 a2 F, Q
plot count turtles
3 h/ c5 e& O- _! w. e P set-current-plot-pen "grass"
0 P3 _# U; t% x, K plot count patches with [pcolor = green]
W, k0 Q' \! C0 D! m. ?. ^# `end
h+ [- H1 X* M, z. C8 h% d0 s' E! `" P H可是运行时提示no such plot: "Totals"
( U$ j1 [; k. X9 [5 B! |- r6 ierror while observer running SET-CURRENT-PLOT8 N$ D& [6 Z9 \( F6 D8 O
called by procedure DO-PLOTS: Q# [4 V5 D: \2 t
called by procedure SETUP! @1 T2 E1 K* T( H- L( R, y
called by 按钮 'setup'- A1 v( I$ c7 e
求大神解答啊 |