我编的程序如下turtles-own [energy]
: i, @+ @# `+ U+ b8 d( C) w7 Ato setup% ^' O' {! A0 |3 {* e# W
clear-all6 x/ _( F) C% `% F$ M7 m
setup-patches
d# E; t3 _) S9 Z, Y/ K create-turtles 1003 z+ ^& k1 Z: d, n# a
do-plots
( D/ B+ S% y N$ P" G' @- P ask turtles [ setxy random-xcor random-ycor ]6 e4 f% ~* G \/ m" Q. [; P
end
6 q% n: p8 M+ u) Eto go
3 r, w( M" Y6 x) Z4 M4 u7 { move-turtles2 C0 }$ W3 ^7 y* A: I. D
eat-grass! S5 v; T; E) I% K$ v( t
reproduce
" g" |1 y7 l9 S4 U# \4 w check-death
6 H1 f0 p3 m) `: s regrow-grass1 N- W+ ?6 c; F: L
do-plots/ }% O D8 K0 D: H
end
1 N r! u$ B0 e5 k5 P4 Eto move-turtles
) o1 P- d1 R' V1 |; b8 K ask turtles [2 S% o1 L D' ]9 O) E7 v9 v8 {3 f3 s
right random 360$ W& z5 u% u$ j0 V- M9 _3 R) ?
forward 18 z' k) d U& G4 f6 R
set energy energy - 1
: D: ^$ P1 d' r0 \, C6 ]1 I ]
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to setup-patches
( I8 Q( V2 Q$ S* e3 ^& L) F" m ask patches [ set pcolor green ]! \6 R2 [& E' p: L' y( K q0 q" Y
end6 P2 a4 `' E6 H6 o) q
to setup-turtles* D8 }6 \3 ^2 B5 C1 I3 S' H
create-turtles 100
+ _8 H! X4 W- @* N. G$ B ask turtles [ setxy random-xcor random-ycor ]
/ z, U' b9 @* R* aend0 D$ _; s* G, K1 m4 ^+ A6 C0 Q
to eat-grass+ B2 Q1 u! N& O. O
ask turtles [, K4 @! b% k% _
if pcolor = green [
. d$ J+ a8 H; S% h! k set pcolor black
" S: j" c' n7 P0 o n1 W set energy (energy + 10)- ^' o7 { y6 j [9 N
]
3 g0 H1 Y `( s9 s ifelse show-energy?/ F2 C% \2 o+ ]+ K! g: S
[ set label energy ]
4 V( {. h% F: q" L# c [ set label "" ]
) K( S% R; P& C/ _ ]6 W- _+ |7 S% e; j) V6 V! o9 ^
end# j& [* p: p" ]/ K( E: D
to reproduce; E* L) b2 A; V/ I1 H. d, B
ask turtles [
, v- K. K3 }- ^ if energy > 50 [
7 O& f9 B- Q/ l5 ` set energy energy - 505 z9 c! g( l, `. u: I
hatch 1 [ set energy 50 ]( W$ P% R2 C+ q# O
]" v# y4 G/ q6 N6 k- d1 _0 m: `% c o
]+ N& }! h6 A% f1 Y; u$ I
end
# d1 }0 K; c) ^9 T/ \2 W# w: e lto check-death
& ]* G0 g' K" F8 i9 T ask turtles [ [7 A9 f- @% p: X3 J" g% q+ P
if energy <= 0 [ die ]
+ N2 i; Y r1 f4 J [; v ]
- ~4 a: b, {* J" z8 C! Gend
0 p% T3 [. I/ m1 U; ito regrow-grass- u$ U+ v3 Q+ l, ^0 y
ask patches [
# u0 i- x$ @9 Z! F' a. s if random 100 < 3 [ set pcolor green ]
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end4 A- _) e- K( ?6 X' P* q: Q
to do-plots
$ P8 d! i' I6 J+ `4 {; D% T set-current-plot "Totals"
5 m2 y% Y5 v( t$ G, Y set-current-plot-pen "turtles"% S; {7 s5 `, y
plot count turtles
; ^4 N6 p4 ?& l+ X3 C8 A set-current-plot-pen "grass"
5 Q( \0 n' j+ P& W' n plot count patches with [pcolor = green] h* @( a z/ q4 b, d7 I
end
( k9 d* G# W; ~2 I, \4 S可是运行时提示no such plot: "Totals"7 _/ w7 K$ I9 J: K, t8 s0 _. P
error while observer running SET-CURRENT-PLOT
5 {0 k4 p4 w! g called by procedure DO-PLOTS) Q. w' [/ y; @' d$ V
called by procedure SETUP
( ]8 Y2 E* \" k4 j+ _1 ^) V4 t called by 按钮 'setup'
& c9 Z/ ]; z2 [, i: F. j; }* t求大神解答啊 |