我编的程序如下turtles-own [energy]3 ?% {# a2 T1 G+ L( I) m
to setup
$ j' {3 z7 u0 }. W! S4 z clear-all# I, s$ K# h" S4 Z5 p. B5 J5 ~
setup-patches
( v% ]. B" `. T7 ?( p! u! K1 M create-turtles 100
, m- K$ P8 a4 O1 R do-plots0 S# {# [1 x$ ^# f: w+ u
ask turtles [ setxy random-xcor random-ycor ]
; w! k* s5 m1 ?- k+ H/ D8 m5 Yend
; u! W, i! J# c0 R) kto go
9 X" B$ f- d! |5 e/ u6 W# s4 [ move-turtles
8 C o# g, y2 i3 g8 H eat-grass
+ z4 n u% u0 E9 T. }/ C reproduce
. l$ s# X4 C6 \8 V check-death
3 F1 A9 Y- R4 U2 U% f regrow-grass0 ]9 m! {+ y8 w9 H) _) i
do-plots
8 I; `* U$ V- e5 l8 ?end2 ~+ J! X D! t7 D: Y
to move-turtles8 P: }- g4 g( z( w5 u
ask turtles [
9 C# h9 a! e8 ?/ r8 y: I s right random 360
) A5 }+ X; n" s" ]: ^& r forward 1, Y8 I, H! q& F* R' u6 @
set energy energy - 1
& D0 G2 Y% u" a4 e" w# k* S ]
+ ^) `* t& _( ~( i: v0 q6 }" uend
' N3 y7 m( n0 ]to setup-patches' I$ C6 V' U0 R# t' n1 h
ask patches [ set pcolor green ]& Z% L' r2 h2 _$ r# I/ e6 a" x; G
end8 _% i' h7 A7 o; W+ L7 _+ p
to setup-turtles
! c+ d& Z" I" k1 ?; ]7 B& {4 C9 x create-turtles 100
5 j5 s# J! T, Y- `4 H( p" f8 P ask turtles [ setxy random-xcor random-ycor ]
* @9 B& l* h: e1 Tend
" g. i$ h; L! f7 y$ Ato eat-grass7 N/ ^8 X, V( c+ n; `; g
ask turtles [2 E) h Y# h% K; Y' I( g! b |4 C
if pcolor = green [; u7 z5 t) Y2 G6 E4 p$ u: N7 H
set pcolor black4 B. @5 `3 ^+ q' w4 l& {: w
set energy (energy + 10)2 V4 k/ W, J/ m1 F
]" R! ~! T% p, ?7 o2 W0 {
ifelse show-energy?
1 j6 q- y( C2 {. N' [8 G6 c, E [ set label energy ]" B+ ^$ N' r9 i5 l- q9 N$ ?
[ set label "" ]- S; ^6 C/ o2 B
]
6 `1 V. Z/ D7 ^1 s0 Q0 r4 I9 vend
1 n9 R$ V% _6 g2 a1 l0 S+ o( M' kto reproduce
& S" j* E, y' ~! s ask turtles [! u) k7 {3 ]3 j, E& M# i) K; [
if energy > 50 [
3 v9 l( Z# b) ~. L; `4 b0 D set energy energy - 50$ S' T, U6 v& C. t5 U" V
hatch 1 [ set energy 50 ]
# k! K: m4 J( x+ f7 k) d ]4 a5 P* q% G3 E9 E3 W, S
]
! a$ g: w- {* n; a# S4 Bend m G6 [ ]1 U' L4 [
to check-death
: ]% ~+ H @% g V" A# h% y ask turtles [
: s7 q6 A) j/ I8 }6 ^ if energy <= 0 [ die ]* M- k. r: e, h1 U8 \* C. z
]
' m; [; P: W& S( V Aend2 z% h5 h+ T9 k
to regrow-grass
' q+ \: ?2 V! n6 O7 [ ask patches [; f& s, h! q$ A8 l# i
if random 100 < 3 [ set pcolor green ]& ^9 h& G4 d. u
]
' z* v2 K* Q: cend8 @' k2 L3 \# p5 J! x! X
to do-plots
% o/ y- \+ s* k/ W set-current-plot "Totals"/ {& v" R _- f D, n
set-current-plot-pen "turtles"
( Z* z3 g5 H# P' w# o! C0 d M plot count turtles
6 W' S2 c1 z+ K- @; \ set-current-plot-pen "grass"1 R; v3 N/ L7 K
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
0 ~# Z7 l. p Y# I2 E% terror while observer running SET-CURRENT-PLOT: H: w/ |8 v; D2 z
called by procedure DO-PLOTS# s& T7 w# q! l2 W/ G3 R7 \
called by procedure SETUP+ [) F3 e4 ]4 q, ]( n6 [7 e
called by 按钮 'setup'
7 a" _2 N% R8 j: Q求大神解答啊 |