我编的程序如下turtles-own [energy]
: O1 Z% L, E6 u5 Gto setup/ P3 h- r! B3 s- M* m& H1 N' j3 d
clear-all8 ~8 I/ ^7 y: x% c j& E c
setup-patches
* z1 d' a: s- e1 I3 F( H* T create-turtles 100
L: O: T* N6 T: G$ { do-plots$ ?( u4 a3 N* Y- d
ask turtles [ setxy random-xcor random-ycor ]
n5 X3 K/ k2 g4 iend7 y) r, X3 t: i( m. q3 `! ]4 P
to go6 o& O8 t+ c; W9 o
move-turtles
1 i) `" X1 J# C4 ~3 g0 z: D5 u eat-grass
5 c7 e$ A( m# ?# ]/ I, z reproduce
# _# H6 n* B; ^: m) t: q check-death! E0 g. [' w# f9 s2 y
regrow-grass
$ R* {+ ], J' ? do-plots" g7 ~* Y0 F- n* i, I+ |
end
2 D' e% R0 O% p& V* Q: q- zto move-turtles4 X7 o H* z9 \- G; ^; q! j8 J. f4 |
ask turtles [: W; Z8 j9 Q# e6 k
right random 360- q# a/ ^: O5 \4 A9 E" q8 Y. a& `
forward 1
# i5 w+ D1 L, w' ` set energy energy - 13 H, q/ M; v! H
]
, I# `& m" X( x* {" h/ h% Fend
% P! N8 o$ [$ s8 y2 q" e+ Z# J* Uto setup-patches
6 G- K% H, Y+ Q# d1 v ask patches [ set pcolor green ]4 ]# n) Y5 N4 o* o
end
& F( W1 @- k& q* p0 B- Y$ _to setup-turtles
. W$ D. ~) _0 R3 c6 K* W0 a6 l create-turtles 1006 p t7 h# r& B. g
ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass" f: C& O8 H7 {
ask turtles [
( t) g' E( `- j% O7 b: d1 V if pcolor = green [
: @: k& N3 _0 x! h set pcolor black! {& `/ V# o' d) a+ F6 w
set energy (energy + 10)
* u7 }7 s- `; U' O# O" a ]: y2 [+ `0 I/ e# O+ W* f
ifelse show-energy?( `" r# R1 e% Y K
[ set label energy ]
6 g: K/ \) y2 R( ` [ set label "" ]+ c$ R# c+ B U
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end
/ U+ F( w% p/ E- G: t" Sto reproduce
$ V, B" F0 y- Q3 s* R ask turtles [
M1 p; M. J1 ]/ o# ^ if energy > 50 [- t* s( Z9 T7 M7 F- w
set energy energy - 503 ~" N- }$ g7 i" j
hatch 1 [ set energy 50 ]5 {2 a+ |3 B+ _5 P" l
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end
$ Z' U/ u: X; E( M4 p( G, W# ^to check-death7 l! c7 L p3 @: q2 c6 l3 V! x
ask turtles [
2 a# Z: X% P# M s3 N. b8 A if energy <= 0 [ die ]/ g# z" g& f B
]5 Z& V' B1 O9 t; c* \8 W
end
* X* `4 [/ U8 }$ G. `7 M5 ?to regrow-grass# Z( k& D7 j% H% s
ask patches [7 e/ g% K) B. Y- d5 @' K
if random 100 < 3 [ set pcolor green ]
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end2 g/ h. ?% C% {0 W% c' W/ v6 o& V( b
to do-plots
; i0 Z2 ^% |# l( c$ I2 X: t+ l set-current-plot "Totals"& F! r9 `* J" N: N6 @
set-current-plot-pen "turtles") B8 K$ i; S. h% {. Z. E; J
plot count turtles( T3 n8 P& B% e. X4 x1 s. c
set-current-plot-pen "grass"2 I4 {/ o7 o% I% \6 c
plot count patches with [pcolor = green]9 v6 E, p {$ D3 ?7 J
end
. M' B+ a }7 i可是运行时提示no such plot: "Totals"8 |' l# K8 @5 Q- v7 W
error while observer running SET-CURRENT-PLOT
' b% }$ i0 Z; K: ` h8 `8 J called by procedure DO-PLOTS
- s% l& [( d- g- K- a4 e called by procedure SETUP
, H) n8 r* c& a0 M; m/ [/ ]* C7 U O called by 按钮 'setup'
- j9 I5 Q1 t0 \4 C求大神解答啊 |