我编的程序如下turtles-own [energy]
; {" U6 \- z! mto setup7 [; [* D1 H1 `4 [3 i4 L
clear-all
$ d8 D# @/ x. D. W U setup-patches: P) p4 @8 v! H7 b0 B
create-turtles 1002 N! H2 X6 `' P$ S$ J
do-plots
( k- Q$ B5 q0 i ask turtles [ setxy random-xcor random-ycor ]/ _; U3 @6 B0 ]) h
end Q' C# L+ ~6 S% o, h( w+ u! e6 i
to go
! x) O& G9 g8 t4 V! G0 j/ p move-turtles# H3 i% W4 F$ P. h- P# _0 m$ ~/ w4 |% Y
eat-grass; H/ J; s' C- [- ~/ a$ n1 a; S f7 L
reproduce9 l) \0 I+ X, v' I* N0 T, ?+ u
check-death
. P. F4 _. \: U regrow-grass
% a9 E) i9 X6 X% }0 b& F; @ do-plots
) X, T5 W _& s* uend
$ A [3 l% z) q: `8 Y( Ito move-turtles
$ Q6 h( O7 F, G3 Y8 f4 Y" D ask turtles [
+ N5 k3 H% [" v/ K. A right random 360' |* P0 o( S6 c8 X7 h3 w% q4 ~& r
forward 1
% _. I3 K1 s- @( T set energy energy - 1
# q# [: G! M/ V5 T ]
8 I# P: Q `. k& ?end
& y8 Z' b) ]) qto setup-patches* t1 ^/ ?' t5 z8 v
ask patches [ set pcolor green ]+ { m$ q' s/ y# ^$ [
end
8 {; K! R1 i2 U- |9 J# ^ hto setup-turtles$ C; D3 k8 I, x+ f1 S
create-turtles 100( H& P% Q8 e/ Z% b2 E# U
ask turtles [ setxy random-xcor random-ycor ]8 e* S, g# y' s% G
end$ }! ?0 K2 Z& ?$ x# {" b9 @. w
to eat-grass7 g* o5 o$ p, }( T% v7 l+ k
ask turtles [
+ L" J& l4 q. E if pcolor = green [
( D& Z- L8 l, S, V8 I set pcolor black
. L W7 a3 @& q0 i: r6 @ O- N" Z set energy (energy + 10)
% V% i7 J( O( C1 p ]& l' f+ e/ K( N& J! x* i8 ^
ifelse show-energy?
! v2 E5 w; T4 h3 Y [ set label energy ]
. ?2 j3 Z; w( |0 R [ set label "" ]) [' z' y) m. y2 R" h, l( I
]" o' d& q" T% }7 h1 W! K# T2 O
end% w* e7 k$ q+ A6 F
to reproduce
( X) F# ]$ j8 J8 o ask turtles [
8 U# Y+ v& g( C( p. a2 J. ]2 a2 \ if energy > 50 [
3 f& ^# M" {$ q) \ set energy energy - 50
; s3 {4 k4 Q% _2 P6 N0 I5 W hatch 1 [ set energy 50 ]2 j! H |3 O4 S1 h, k7 h
]
& t2 S4 C u" z/ D5 K8 Z J5 X+ L% P2 E ]
) e' _( s% t; ~9 d8 gend
/ E$ E( d/ z% z: L6 b7 V' f* p4 pto check-death
& M% A$ _, q Z) \. @ ask turtles [
/ P' I% a! _. t- o4 Q# S0 o if energy <= 0 [ die ]
+ P9 q- H6 }5 C& }& @ ]
- _& @& y! }7 A$ _1 o zend
/ m* W! C- R% s: r8 m. }5 A( Xto regrow-grass( N$ z& c0 I& z; P8 u
ask patches [
4 Q# @- ?3 ]- ^ if random 100 < 3 [ set pcolor green ]
9 e9 A0 r3 H- L/ B* f' d% m ]6 X1 `' P2 a+ m
end
7 \, o& a4 ?% J, q4 |( ^' j& Y) Ito do-plots: g) L" f3 ?* b: ?
set-current-plot "Totals"
" `0 o$ F3 r# _4 F! t! w3 p set-current-plot-pen "turtles"* p4 W# K/ P8 x# {6 M. m
plot count turtles1 t) C4 i# i- a: z9 U
set-current-plot-pen "grass"
: V3 ]. n' k/ z5 d3 A( q! I2 v plot count patches with [pcolor = green]
" E8 I1 O# d; `" yend+ I# v" [" E' W4 t- T
可是运行时提示no such plot: "Totals"8 O. T8 L3 s) g- [
error while observer running SET-CURRENT-PLOT
' f! X: W2 o* I$ k; K, O- T5 C called by procedure DO-PLOTS
) D# E4 H, N9 J2 s called by procedure SETUP. I' } y1 A8 z. W+ Z8 N. t
called by 按钮 'setup'* \ r0 S( y9 ^, w5 N% d3 A9 F
求大神解答啊 |