我编的程序如下turtles-own [energy]
" Z/ g9 T% @& Kto setup7 W( b8 h2 g% m, {
clear-all
; p# O/ N1 \( R, o setup-patches
+ ~; z1 D9 \% c3 K( \8 X) l: c create-turtles 1001 f2 P' J+ u7 w* @( f3 H6 I) w
do-plots
9 w1 i) I7 }. l! Q4 B F% K( k ask turtles [ setxy random-xcor random-ycor ]
* {# x$ s0 f* p$ h1 Tend# L% i3 J, u2 \
to go# X4 V* q8 G1 h' }+ E
move-turtles
3 g5 k- f9 u/ }$ O, t2 Z eat-grass! {: l4 S- p4 e0 m
reproduce
. q) i& B" k. e8 f- X4 C8 H check-death
. O0 ?- k: L' H3 y9 H regrow-grass
; |5 l D: e; R do-plots$ R/ a$ _5 P" e( d0 l4 v! T
end
$ X" d" a0 e# L# l+ Q1 fto move-turtles+ O6 r$ e z$ {1 [
ask turtles [* X: D) a- E0 W4 ?
right random 360
0 o, F2 j! T( h. h4 ~4 _# w' h forward 1
, Q# o& a& l' ~1 H& N: C set energy energy - 1
' W: W+ K$ C0 j1 z ]
& I E# T- G) aend
8 w) |1 q) W' }# h- n5 m7 Ato setup-patches7 f3 i: E' O6 c- a# [( a7 ]. ?
ask patches [ set pcolor green ]. a& _7 p( S% b& M# u
end
5 `5 q+ A5 p* \0 ?7 ?; N1 @. Fto setup-turtles1 a: Q( s+ T. c* D& B" O" v
create-turtles 1002 g9 [5 I% l- f; Z! A6 e
ask turtles [ setxy random-xcor random-ycor ], Y3 c4 ~9 W! Z" W
end
3 ^- E8 }$ V, T8 g0 p. V3 F1 `" Pto eat-grass
! A& A6 }/ ], _$ g0 b) r7 C1 o ask turtles [
' Y+ y/ s3 b. ^, U6 G7 a! { if pcolor = green [) D% I4 q- z) e* L3 s/ M1 h
set pcolor black
- u0 ]8 _6 D2 |! `% _1 e: G set energy (energy + 10)
7 A3 ?; Z+ t: k& g+ z0 i ]+ W' n* z" b h& e
ifelse show-energy?
9 p' T+ r, G/ _) v) K3 C [ set label energy ]
+ M! o0 E: j9 d [ set label "" ]3 H7 D) a3 Z& T- i0 k; n _1 \
]
2 \/ `3 i% B! W2 H, G: p' [end" x0 M: g4 W: S; g
to reproduce6 Z. ?$ A7 p% U9 [. P z w; n" A
ask turtles [5 \, }. r0 t) t4 _% U* q/ e3 h
if energy > 50 [
; h& M2 G8 o' D4 w set energy energy - 50
( h @: {1 S' }# S$ P: @3 q$ T hatch 1 [ set energy 50 ]. g& B" E. _5 ?- U" E. |1 i
]1 K8 q4 q' K' p* [# F- k5 @7 v. M
]5 A$ ?) j1 Y- j, J, R
end
) [% B' n0 t0 B/ j" x& J1 oto check-death. A! x3 {4 C0 a6 X
ask turtles [
* V4 i( n1 ]; @+ Q if energy <= 0 [ die ]7 \6 p6 Z8 a, s6 `/ e
]8 ?1 P) a5 Z8 ^* m1 N3 |/ X/ q: V
end5 v- m4 |/ f1 g, G6 C
to regrow-grass
6 v" A& |' H7 s8 C6 U6 R ask patches [+ U/ o4 W! I. T/ {! ]) d
if random 100 < 3 [ set pcolor green ]3 W& W; r6 C- S
]
! O$ d9 }# S5 {3 }8 dend
* `2 Q( ?' X7 ` `3 Rto do-plots
3 x( J7 P7 X" ?+ v/ I set-current-plot "Totals"% ~! {. _. K) `, q* K7 F5 u
set-current-plot-pen "turtles"$ z3 J) Q( b' }
plot count turtles
9 w. [- @3 |3 W3 E1 K j) t1 z set-current-plot-pen "grass"
+ k1 q* B) O1 x: O7 y; @9 f plot count patches with [pcolor = green]+ B1 L! v0 f5 a: m% S3 i
end1 F9 ^6 R8 _+ Z" P y5 t
可是运行时提示no such plot: "Totals"6 c0 c0 C# @* \7 k/ l9 e4 J% c( A
error while observer running SET-CURRENT-PLOT% k w& I, U+ U6 i, {3 ?
called by procedure DO-PLOTS; W9 l$ ~$ \; M1 Y/ Z% a
called by procedure SETUP
i" Y* \ a6 o, W0 y1 n: | called by 按钮 'setup'3 q+ @/ h, @- N4 V( g0 N
求大神解答啊 |