我编的程序如下turtles-own [energy]: |$ ^( ]) L' Q1 a, O) j9 n
to setup
3 U9 P) {/ J; e2 I8 M1 R( ]% o clear-all
! k# W9 O) |" h0 }# ^0 F) Z. I setup-patches
+ A E& D6 B3 w& A3 u, R create-turtles 1007 {) A+ o0 d4 N7 G& u" P& S: @! _/ W
do-plots
: h. {3 D5 g4 h# p+ s1 l% L ask turtles [ setxy random-xcor random-ycor ]# C' l- O* n& w3 V/ H& a. V& p; C$ C' J
end
% p, ~' M( s1 H) X5 D" f; _# Gto go
$ j8 ?( L9 t, z s move-turtles* z; F7 u( u5 |. b! G# m
eat-grass5 U- r& P0 J6 L. k+ g1 @ b% i# W
reproduce
/ n9 l8 z0 b$ ^$ R: t$ D2 ~ check-death
' _! _/ r$ q6 L6 g regrow-grass6 W% `3 M, a9 T' g! m
do-plots- t2 I( U" d% d$ J! N
end
( y4 p% o5 N7 H& }! lto move-turtles: w" D7 }5 f- m' a( ]; J! T
ask turtles [
5 i& [. T2 O" F* z; p' [ right random 360
" Y; A* e: c+ Q e8 @ forward 1( k+ P, _; T3 I2 ^9 V' P
set energy energy - 1' m/ a0 K8 L, l
]7 A ^ [4 s$ ?
end& l! a3 ]- b: p0 ]6 b6 b
to setup-patches @( G# b8 {# g3 s
ask patches [ set pcolor green ]
" w( x- K1 s. e: U$ eend4 p7 \+ V* l- g" s! `) K; y
to setup-turtles
' {8 Y ?' r3 b6 d3 L% _ create-turtles 100
7 `8 O; |9 G2 O$ B ask turtles [ setxy random-xcor random-ycor ]
; J( |0 R9 [3 o' C" D k- q7 Dend
, `9 @* k8 J. a' g" ]3 Nto eat-grass9 s! u% L1 X6 y' j: q
ask turtles [
2 s0 {/ S, _& O d: K+ v8 F% q if pcolor = green [
1 s6 K' V% G) Q# U) H set pcolor black1 D% r9 Z/ S7 M$ x7 C! m! G$ Z) c; R
set energy (energy + 10)
) R# P& G5 ]4 U4 ?' e ]. F+ ~8 r5 W% V/ u* s" U
ifelse show-energy?
, H9 X0 y L+ u4 h" v, u [ set label energy ]
. u+ a4 g8 |" z2 c, ` [ set label "" ]* f) c6 t: u6 ]5 o+ ~8 ^
] T1 p H) O7 t
end2 w b6 @% I# A3 l# e
to reproduce+ H8 ^7 y3 t* i% S& P! f
ask turtles [
' H) D" M$ }5 ?3 |; {# \ if energy > 50 [( P9 x) ^; T$ `7 A
set energy energy - 50
/ g w- L/ c/ }# R hatch 1 [ set energy 50 ]- p0 m; z. i7 |
]
; I l1 f3 D9 f6 l3 B3 \5 Z% u ]# f c7 V% r. ^6 u6 M3 G6 N3 x5 f
end
; @$ i7 r8 ~$ i- r6 D# Z1 lto check-death$ l8 M5 s0 V/ \, J2 Y1 R
ask turtles [
# D5 W$ t r) D5 @1 ] if energy <= 0 [ die ]1 D7 ~9 [% t$ t# V! `
]
( n5 Z4 Q6 d2 u2 O6 I }$ dend
8 Z' z5 C7 B- g4 Rto regrow-grass
' C+ _2 s6 Q0 q Q ask patches [* L% z; M1 X& x9 o& v; S6 s
if random 100 < 3 [ set pcolor green ]
U& c% {. ]" i$ G; _' Q ]% I+ `' V; P% z* {9 R8 [8 t# T3 W
end
4 a# F) S2 B, r- [2 n# mto do-plots1 q+ E, d, q% x0 G' n4 P
set-current-plot "Totals"
+ ]; O0 @/ |; v _) G% X2 n set-current-plot-pen "turtles") _+ q1 z% v2 N8 d
plot count turtles. h: M1 Z" Y! x7 v) e% O% A
set-current-plot-pen "grass"" R; ^" J2 S/ _/ ?- A' B
plot count patches with [pcolor = green]; z& E5 j, I1 a3 O+ {* ~( P
end
( n, r. } P5 o, D3 B0 J可是运行时提示no such plot: "Totals"
& V4 m8 U9 t% a$ g7 G" \! Ierror while observer running SET-CURRENT-PLOT
4 D4 v9 F5 B# o, a3 W' H called by procedure DO-PLOTS# w5 d) |% z! I$ i2 u/ _
called by procedure SETUP
3 L( H5 b' x. l9 ~# H called by 按钮 'setup'! \* L, Y9 S$ Q* Z: Y
求大神解答啊 |