我编的程序如下turtles-own [energy] A+ J8 k4 O, ?) O
to setup, Q* N& h- C! F1 @+ d. ^6 j
clear-all& S) S. d& P. `1 H' \
setup-patches
( |! x; w- R, F5 l. r, b: A create-turtles 100. f5 ?0 s+ T# h, \
do-plots! l8 B# ~. o* e |4 g
ask turtles [ setxy random-xcor random-ycor ]* w* D7 L. Y7 A9 C2 d
end, o/ s& R* a9 T) k
to go B$ S+ V* ^, i* _
move-turtles5 _& V: Q) v8 C
eat-grass
% H- @) t* G1 x reproduce
! _ e2 a7 q* a7 P: k check-death9 q/ M/ y' \8 k @& n
regrow-grass
4 o" b0 U+ F% n( o3 p+ I do-plots: ?1 P2 g( s) @
end! Y2 y+ k; v- @7 H R
to move-turtles
8 x- L. [9 p' s, O. t+ t3 { ask turtles [
6 s, C2 P7 C6 U( e$ W right random 360! [ K$ V- h& t0 Z
forward 1" Z# [) `3 _( m2 o$ `+ A, A
set energy energy - 1
/ c* T! X- K+ p2 Q ]1 ~6 I+ ?7 @( H5 _2 a
end6 b, K8 j, C5 ?8 X: s0 S) J
to setup-patches+ j4 P' Q; T; R* t
ask patches [ set pcolor green ]
7 m! c F% E' o! L1 a# A/ d) send
# l7 j( x3 K5 ?# l' b9 J0 uto setup-turtles3 `5 [; U) F' B9 _& L$ ^/ h
create-turtles 100+ B# Q9 T4 h' V8 \* |
ask turtles [ setxy random-xcor random-ycor ]
% P% w7 L y7 V' G4 Aend/ v( ^" |6 `- h% p- U' }/ H, L5 S
to eat-grass% d4 W% L9 Q0 K: P9 z3 F( W
ask turtles [
9 [, Q% X! ^0 c# S9 ^2 a0 e if pcolor = green [8 T6 H" U- M' ^8 x& J' D$ }, D
set pcolor black# o9 h+ i k0 N- R3 E! V
set energy (energy + 10)
* d) d ^3 b2 {6 d$ o* x ]4 Z% o( P6 j# L3 q0 O
ifelse show-energy?' q) X, v$ n: r' ?2 g: |# v
[ set label energy ]2 ^' J6 g1 ~- w' ?4 j
[ set label "" ]
9 Y+ B) h! a5 x* D8 h, h: s ]
9 ~: o D$ Y# K# M+ I* v- qend
, q/ v3 m0 |( N* p w! x' Dto reproduce
0 N3 T6 H# i2 |9 T ask turtles [$ e( u; S6 n$ m0 s$ H+ C% H7 o2 I
if energy > 50 [& u/ b: z) I4 [$ y6 m5 g
set energy energy - 501 ?3 E1 B3 D1 S# a. ~, ~
hatch 1 [ set energy 50 ]* u) e$ X3 k5 L
], {+ Q/ o4 j3 ~: `9 b$ q
]
}% T Z$ V- ^' G3 S" W U4 tend
2 V0 o9 k$ g# k- {; R. R2 e9 _/ ]to check-death( l+ F/ |+ x+ |' r8 M2 h9 W; _
ask turtles [+ K- [# ]+ V* l; P& c
if energy <= 0 [ die ]
# e+ N+ W: y: h ]
0 Z8 W8 Q T* r3 ]end
1 ?; I% S) l5 m! b1 l. kto regrow-grass
6 u' N, o- R6 q$ l2 P, T ask patches [
$ f+ _0 k8 O7 Y5 ^$ w& u if random 100 < 3 [ set pcolor green ]) U8 `1 g2 S; B" [* g
]
; S, }) e! A7 c& q) f5 yend
( e+ |, l0 g/ wto do-plots
9 P9 [$ {9 u/ x; m: Y1 p set-current-plot "Totals") O4 u/ i# L* ~3 d. N% a
set-current-plot-pen "turtles"/ n4 f% T5 g) t: U
plot count turtles6 ?$ ~- x8 \+ e
set-current-plot-pen "grass"' e3 q- w4 G/ o) y& b
plot count patches with [pcolor = green]& @: _% P7 o q8 u' [3 `5 k+ U
end7 {; Y1 k1 n: D3 a& n' x
可是运行时提示no such plot: "Totals"% D" X0 V+ Z+ t% j) W
error while observer running SET-CURRENT-PLOT( q, h7 X# ~% `
called by procedure DO-PLOTS9 r L6 B5 _0 J0 U
called by procedure SETUP- w& v4 h: T- p( V: G. p
called by 按钮 'setup') X6 g9 |, n) ^8 t) n
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
