我编的程序如下turtles-own [energy]# W+ R' ~7 l: V2 M( E3 e
to setup# o4 z0 K3 J, o3 @6 o
clear-all
) n3 A" Z, w& c5 O setup-patches/ j) w0 T- i$ K ?
create-turtles 100
$ Y1 I2 m- O+ |$ K+ T do-plots+ _5 V0 E3 I* G( A% @
ask turtles [ setxy random-xcor random-ycor ]
~+ G6 q4 e% Z7 [! p+ Iend
; r" J: ^! B7 Dto go; a; `1 A7 S0 f+ `# r3 R9 [; z
move-turtles
: M$ p+ w" N9 n5 ~4 n, O* f eat-grass
. D2 w3 t1 c6 B6 \6 D* n reproduce: d+ v! E) h' v
check-death7 B, r" g/ C, x, K5 T+ v' S
regrow-grass( z0 R: j# [! b: A0 V) x% n
do-plots! e5 P" I# q5 w8 L; d
end1 H/ ]3 m* {" ]3 k
to move-turtles
' y- ~, q- V% d+ b ask turtles [
5 |7 I3 I5 n) o* j right random 360/ p8 B: n# {9 e. [0 r
forward 1
' n! l' g" |7 X2 H set energy energy - 1' r5 i5 {5 p( }4 v, R% C7 x
]6 T& }* O$ V% d; D; }, d
end. ?* p5 ^7 U4 ` F% q, N6 _
to setup-patches- j+ O& Y# @$ l* \) g2 w- @# u* Y
ask patches [ set pcolor green ]; c) S5 R+ m3 B' ]; D9 n% i% w
end* L& M# y: i. F4 R. B" a
to setup-turtles
5 F, P# q/ H7 G- Y create-turtles 100
( w" K' t$ o$ d/ H" c6 ], a. f' s ask turtles [ setxy random-xcor random-ycor ]9 J! T( u5 L3 x5 h% \; }
end
z6 X9 c t: [( ]to eat-grass, l2 Z+ Q3 {# ~2 F" W7 u
ask turtles [
7 x I* A6 }! h0 m" \/ X if pcolor = green [$ {& S4 U; A$ c. s* ~( X
set pcolor black
! n' L* l$ M, M- g( p8 v/ _ set energy (energy + 10)
& C B4 h$ v b$ R ]" p, A$ f3 K5 [3 d5 I4 b) ]) [
ifelse show-energy?! Q K. [" C g
[ set label energy ]" Q4 i( s$ T: ]- z" ?5 Q, S8 y
[ set label "" ]
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end8 v/ N, d5 i3 S
to reproduce4 V7 M5 u; J9 K: A, M
ask turtles [
; ?% o6 v9 a3 A( i" Y- H' \$ W if energy > 50 [5 }4 {$ ], X8 A! P- P- Y! E: ]
set energy energy - 50+ @! F0 E3 ]" V* g/ C
hatch 1 [ set energy 50 ]3 \* r& t6 W1 Y/ p5 o
]
$ d- \7 d) m, p) [2 p$ B- w! j4 v1 E ]
, h, A) A" e' {5 `: y3 Fend% k0 {! y# B: M- U% t3 o' S
to check-death
) F) A2 ^. [* I ask turtles [0 ?5 }: w% N$ ?* m
if energy <= 0 [ die ]
7 @* j6 z9 y' {! K6 y3 O) s! R ]
! c1 C; P% v- Z) B, ?3 I: Xend( n# \! J) ?5 ?; t
to regrow-grass
" K: F9 t9 q; H$ y5 K ask patches [
4 ~5 u4 j/ J, F6 p if random 100 < 3 [ set pcolor green ]8 t; z. `+ s4 X7 V
]& B( c+ ?. H) ~+ ^7 p' P0 `% i( j
end: }& r$ f! B; {8 y) {& C A
to do-plots5 b; r) v, Z# ?- S, _2 ?; S1 s x
set-current-plot "Totals"
" L- U4 L1 k7 u ~9 [, H set-current-plot-pen "turtles"
: N0 C" A. w. Q& ~" L) I5 L$ x plot count turtles
" W) q: Z2 `: S4 a8 E* K3 R# \ set-current-plot-pen "grass"
4 h- N3 n, A$ L) }# D* F plot count patches with [pcolor = green]; F; R3 j* \( }) j
end
& l4 ^# W4 _1 l可是运行时提示no such plot: "Totals"
' H4 y {4 y! M" S! Rerror while observer running SET-CURRENT-PLOT
: l( ?# \5 `. i- L4 F/ f9 |/ | called by procedure DO-PLOTS, x, W; x6 ]2 b1 j* B
called by procedure SETUP
) ~( H- ~) J1 `6 ^. p called by 按钮 'setup'
% ^4 H2 J6 A1 M求大神解答啊 |