我编的程序如下turtles-own [energy]1 M. E3 ^* c7 Q' c, E! |4 C
to setup
% q. r/ H% w5 b) P, L6 `0 g1 S& V clear-all
! J# D d7 s4 s4 T* q5 j- j9 @ setup-patches/ q. _. g( m" e
create-turtles 100$ C, X* Q' I: x, p/ `4 t+ ]
do-plots* `: Y, e, s x1 J# N
ask turtles [ setxy random-xcor random-ycor ]
! N7 ?' y- `) d9 o# g9 W8 qend
; O8 t$ F$ M: E4 L4 }to go+ T( C1 ?8 ^ U" T0 W: B& H
move-turtles5 V8 S! \7 T+ [
eat-grass
& u$ l0 S* I/ n% ^# T, p reproduce
; A2 R" P* W. o( G check-death5 C' z0 w0 K5 y& r' o- \6 {: V
regrow-grass
3 Z+ e5 X5 E; w) `) p+ O5 [ do-plots8 G4 u5 @* h& N. i5 P- j8 Q
end
% C+ {2 X+ b1 E: Dto move-turtles/ Q" Q1 `7 ^8 t P9 L
ask turtles [
/ S* T. M6 v, }- {% i9 _5 N right random 3608 ^& ?: }, A/ v) X( N& N8 O
forward 1% W& d; {4 U5 Q1 x
set energy energy - 1
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* v% T% \$ q ]) u+ iend
) P5 E, |/ v4 q& k: }to setup-patches
9 `' I+ e- V/ S0 m. Y; r4 m: R ask patches [ set pcolor green ]& r- C; X( a M
end
- I5 T5 z" [6 q4 ?to setup-turtles* m# \8 z* t! a# j P
create-turtles 100
+ z# v: l$ t: x# G @4 X ask turtles [ setxy random-xcor random-ycor ]0 p$ Y# f6 [' w) m5 v
end- Y- ]# l' Y$ |2 V8 ]) x
to eat-grass
9 Z9 e7 B' V# z2 E ask turtles [2 Q8 f# F8 k3 f* d* X, r: Z/ p
if pcolor = green [: k6 g+ W. \; |& {5 o4 `( ^6 R$ o) _
set pcolor black, Q$ G. x5 @; m- m8 v: s
set energy (energy + 10)
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' b5 O* e' s& a3 {# }# `% d( U ifelse show-energy?
0 R7 } W- I- B& {$ ` [ set label energy ]4 A- v* o, e/ U1 M4 p: _5 Q
[ set label "" ]7 o/ J- T! \: b$ W. Y5 [: {
]1 y& ^( R. G4 x% J, }0 i+ t
end& V K2 T! T' b3 t: |. r; `* \# y
to reproduce
- e) @( D$ E% C! T& H ask turtles [
|) r: _# T) u+ I) \7 R4 O! V if energy > 50 [
$ ]& z; O; m2 f; N/ m; N set energy energy - 50( {" p: }, U& y. j% H/ L! h7 Z
hatch 1 [ set energy 50 ]
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]. b# M2 |2 E/ G" y: p3 c. X
end
0 B$ ~; Y0 e- P: |) W- `to check-death
- O# ^6 a+ G- i7 w ask turtles [9 x- D0 o" A5 B
if energy <= 0 [ die ]
8 G/ }* c- y& m4 u/ ^5 h ]
3 ^$ Q- Q; G0 k7 n7 f2 Aend. s3 q& H$ U9 }8 m$ \1 c
to regrow-grass
1 L$ y" E$ K& O& c/ j/ w5 A, d- {; A9 { ask patches [
, Z! V% U7 U" ]+ ]) ]1 W, K U0 t' N if random 100 < 3 [ set pcolor green ]* j; z) Q5 W% R
]2 k0 y) b+ p! K E8 b" z: ]
end$ \+ u# U8 Y, d" c8 ~) _" g, [
to do-plots4 E. }! z' w# y5 N. ?% \
set-current-plot "Totals"0 D" ]& X3 {, N4 g5 ?6 e% M
set-current-plot-pen "turtles"7 b9 i4 d7 ?4 j
plot count turtles- r0 N' s5 ~- {! [7 Y$ E
set-current-plot-pen "grass"; s4 ?* h8 ]9 h' w0 l
plot count patches with [pcolor = green]
4 j6 Q5 t6 ^7 A7 N# kend
3 A( z7 k$ i: I可是运行时提示no such plot: "Totals"
8 j3 |- n' o7 l/ [error while observer running SET-CURRENT-PLOT
$ O% ]$ \& V. E, {) F9 @! Q/ u' K called by procedure DO-PLOTS
$ q" _5 O0 F8 u% V called by procedure SETUP- w- c: g9 \' I0 n5 [4 T
called by 按钮 'setup'' e: N8 \0 @- D2 V: L
求大神解答啊 |