我编的程序如下turtles-own [energy]) _4 @( @# ?( \+ D; A5 i8 s
to setup2 |& R7 ?/ f$ u6 z" ^/ {
clear-all
- l7 [6 [1 o* w) u& f! j6 K; W" Z) V setup-patches
+ D; N/ S4 L& M Q( _ create-turtles 100
' i3 X ], ~" @3 g1 q* I do-plots
! O8 ^% [8 ~+ y- R. X4 z ask turtles [ setxy random-xcor random-ycor ]3 r9 a3 \* u2 b4 t6 O5 M" G
end
, u! T- N) h) [. r3 qto go' ~1 H& s6 U7 D* ]
move-turtles6 M2 k9 l r. k- g9 F# S/ K
eat-grass
- G% V5 d8 u$ {, ]" V5 F/ ~ reproduce
" s. {7 F' t2 |) H# H/ Q9 { check-death
" n: ^, Z) O- }' w L regrow-grass/ ^2 d+ h3 g- x6 S
do-plots
+ U* [5 _! R/ [3 [, d' oend
) V, \; m) G# U; c" W" S+ vto move-turtles
' o5 J# R, O/ m. t" k6 C$ O ask turtles [# [3 p& e' _: y2 w# {# q, s
right random 360, J' c0 @5 p0 g1 q
forward 1
5 i* F/ p3 ~. N9 v2 J: ?0 V set energy energy - 1
( _- E0 D5 t9 g, Z2 d% t6 _; w ]
: z1 w- t5 R& b; m* }end) D; X' f6 h/ z* ~+ v- u r
to setup-patches3 O8 i3 R5 V7 l& ?" \* U1 Z# C
ask patches [ set pcolor green ] ]: }, Z7 c6 y, I8 N& p
end
3 a9 |6 i9 V' Qto setup-turtles
5 z" |; D! O% l+ _ create-turtles 100" m8 z% {9 _5 V
ask turtles [ setxy random-xcor random-ycor ]
* v3 F* z& v; g% k8 vend* E- ]1 t2 F: I
to eat-grass
6 `! r; F( L+ R( ?1 O3 U ask turtles [ }5 `9 {* K' J$ a2 y7 r
if pcolor = green [
0 x# k- B0 C7 b set pcolor black
. Q A; v' {$ K- P9 K set energy (energy + 10)) y5 B1 F6 J/ m: r* K# \
]
( O$ Q1 H1 R* u9 z8 _% j ifelse show-energy?% r* J0 E) y% R; r9 K3 q# \
[ set label energy ]2 U, p! j5 P4 S# J' k6 ?: O
[ set label "" ]" l. t9 U) D" I9 V
]
4 c- V3 D4 V0 \6 }9 V6 {end
! w* J6 I; _7 ?9 B* u+ @- t8 Xto reproduce
% r* I T J. s' P* a, \ ask turtles [
; x7 H F5 [. Z7 O$ a if energy > 50 [
/ N. g9 I- f" h' B& l3 B- G set energy energy - 50
" c! C* l. J. Z7 l c5 u hatch 1 [ set energy 50 ] m- h# h# q3 m- u
]
, o1 P( J& I3 Y8 s/ W. L; ? ]/ P& B; J* H4 H2 ^
end
/ b4 }. u1 I# G- kto check-death9 p( {$ J( x2 ?, M* d
ask turtles [
. W9 @# y+ I- q K3 h if energy <= 0 [ die ]: u. v! ~; d7 z6 `, E+ H1 C
]! `; M, T2 S; U$ s2 }
end' t) m3 y |& `% ]
to regrow-grass# K, V% w5 H6 [
ask patches [9 _% n& x# k% g2 u
if random 100 < 3 [ set pcolor green ]2 t! d) K$ T0 S4 E4 T0 y4 }$ h
]
& I' F4 C) q( a# B4 D7 Uend
* w3 S8 X% M7 b2 Xto do-plots- W6 T2 Z$ c6 ]- x1 ~3 P% ?
set-current-plot "Totals"
6 V7 a+ U$ y9 V: P. ] set-current-plot-pen "turtles"2 K; j6 s. p3 W, |4 W
plot count turtles+ Z7 j1 h5 P/ d t9 R% Q# N
set-current-plot-pen "grass"8 b/ ~- t) ^7 `, [8 ^
plot count patches with [pcolor = green]
& G/ l7 ?4 X) i! J* ^end9 G& [ W- K: `9 D d- R
可是运行时提示no such plot: "Totals"$ Z* q) l$ u0 c. c- n4 n. D
error while observer running SET-CURRENT-PLOT
" |; Y( D1 G( j3 Z9 Q- f7 p called by procedure DO-PLOTS4 ]) C# k3 `1 A) l
called by procedure SETUP
+ g* A& O: k+ y: S" M6 A' d called by 按钮 'setup'
8 P6 h* w6 r8 L9 l0 T- F5 \+ h求大神解答啊 |