我编的程序如下turtles-own [energy]- {3 {; _9 i/ k e: w% ?' o/ _
to setup
! p% n# `$ ]/ O! Y2 }* E& T% I8 S clear-all
. w" ]3 g6 c( f1 z setup-patches1 Y E$ r2 U' S( |; W$ W- U* c5 Q
create-turtles 100
% \% g# s1 k p6 a7 | do-plots4 G* S4 q) ^0 J
ask turtles [ setxy random-xcor random-ycor ]
0 L9 ^2 ]& C: M" \end
2 i/ J( F3 T) ]to go
# |( b3 U# n$ ^ move-turtles
0 f3 c$ a I, \ U0 r, a, Z9 M/ R K0 w eat-grass
. K h5 a1 w+ `; [; t5 m1 l& w% q$ [ reproduce
7 k$ ~9 \$ \& _5 N6 c check-death6 G- F& `) i: A0 S( l6 ?( C% _
regrow-grass
/ t* }- A; ], d6 B. X+ j$ X& F do-plots) Q- ^* e0 U% a( D g1 F$ w
end
8 I: L0 S7 B+ ^( y% A% f7 Nto move-turtles
0 N8 j9 n7 r& `2 [2 u' ?$ d( B, e; G ask turtles [
6 A' h4 l# _- \2 ]4 |( r right random 360
# |8 R+ v' t; k* |* z7 q: p forward 1
% S8 R k) _$ C$ C1 S G a4 X( X set energy energy - 1
8 b: X% k6 q* ]4 P- |7 i* J3 ? ]
, j4 [6 V p J3 B$ ^- a0 cend
" C" K/ w! h8 y# U; r, ]" x& xto setup-patches2 C8 h+ k9 g' c8 o. n/ Y$ D
ask patches [ set pcolor green ]
, k0 s; O' J$ p U& Xend$ r# [8 i" m8 C0 P7 D% h1 G' J9 n3 Q
to setup-turtles) W( n3 F0 u8 P
create-turtles 100$ w) h" n" p* w& \7 v
ask turtles [ setxy random-xcor random-ycor ]2 U9 X9 r% t5 V
end
3 W# K- `! D$ u7 f2 y0 y) [to eat-grass
0 D" U$ ?: }0 k1 x ask turtles [. r, w! y0 W( w5 O! _
if pcolor = green [
: X6 T) N _6 d- Y4 O8 e& Y set pcolor black( [4 ^- q& W8 |8 l* u
set energy (energy + 10)" V6 W D, {5 u
]
/ c8 W& g4 C( U( n9 ^/ y ifelse show-energy?; i+ J" U9 ~% c1 M3 H6 S* ~( u
[ set label energy ]
, y" f0 Y3 Y1 r3 z9 ]4 i2 f2 \, d( ]9 j! C [ set label "" ]7 ?# z- B* j' L$ O$ Q8 w7 Y) S% ]+ }
]
: z$ }( {% {7 u6 z$ ~4 Uend
5 |8 q9 x& s* x2 O) K/ x; |to reproduce
% Y' s8 t/ Z m1 M( O* ? ask turtles [$ Q& M: Z$ \- l. J7 ?8 b+ m5 F' \7 S3 f
if energy > 50 [2 z/ H8 G6 D; m+ D0 D2 J0 ~
set energy energy - 50
6 T# r; m4 n8 Y! p5 u! a* L% k hatch 1 [ set energy 50 ]
+ v/ s# U$ U* p# ]- z ]
J0 {8 J$ E* x3 f1 r0 J ]
' c: w& O! A) J$ Tend
2 Y: R1 Q& K8 Z# l: q( uto check-death8 N# W X5 ~7 ~; S6 J
ask turtles [6 t# [+ ?0 @- c) n ]2 n
if energy <= 0 [ die ]* r/ k, |0 \: [6 z
]$ h) v3 j3 P" U/ I# F3 k
end
( d2 I' T' N7 Y1 o, ], y6 @to regrow-grass
9 _% l9 Y, D0 j+ V$ q6 q ask patches [. R$ T+ k( W, Z7 b2 s3 {
if random 100 < 3 [ set pcolor green ]
) S9 G3 m( M3 r3 @4 j' s% i ]9 E: p: u; Q" Y
end
2 V& s5 ^4 v( d _2 W2 lto do-plots& ]4 X$ u* \% t2 n+ d. P: z* G# w
set-current-plot "Totals"
; Q3 a& P/ i8 ^/ O* q2 t0 u( w set-current-plot-pen "turtles"
; y% j4 G8 \' G* u' V plot count turtles
( x, s, p9 }9 ?6 y# i2 H& V k5 ` set-current-plot-pen "grass"
# J# B {; k! F; k0 c$ ~1 p h plot count patches with [pcolor = green]
, u- S9 p% ?. Z% Cend
- Z7 V+ W7 q' Y$ ^可是运行时提示no such plot: "Totals"5 y3 `& I/ A# t% n e3 j7 V9 V
error while observer running SET-CURRENT-PLOT
3 x7 r9 g1 v3 y) s4 Z called by procedure DO-PLOTS
M8 g/ F! p2 E; P called by procedure SETUP
6 Q3 l; o$ ?; }, h' m1 T called by 按钮 'setup'
+ u. ~ ^ X. z0 `- V+ w求大神解答啊 |