我编的程序如下turtles-own [energy]
: B3 \: e6 E. `' s4 `- @! t1 u. ]to setup
' @* u$ B' z. F, z5 i5 V clear-all
% k; O" x# c2 R: g8 a; B+ L$ B setup-patches- x1 u5 _6 w' X. B: C
create-turtles 100( c2 m2 e5 s2 q3 N' h
do-plots6 T; q! ~& D4 m
ask turtles [ setxy random-xcor random-ycor ]
* a9 K! x9 J% R6 i8 fend
2 d! {( e6 ~$ l! l [to go5 h2 f) L$ f1 ^8 b; [4 c" L
move-turtles
; t* J% ^8 H% _, C7 L; L eat-grass2 y9 w1 d, Z: t
reproduce- `. Z0 U" J" P
check-death
2 Q- X7 _' L9 i# R regrow-grass
# K& z1 Y) l9 C1 b% ~% ~9 q6 Z do-plots
4 R# z$ v* M: N5 ~7 K$ mend' Z+ k- y3 H2 j4 h; q1 R! g# C
to move-turtles
3 o4 X/ p* L; { ask turtles [* D2 P9 A! b4 m4 d% f( Q
right random 360! X6 k! E t* Q6 W
forward 1
2 [- X g6 v+ B8 v% C set energy energy - 1
9 X6 M" ]# O+ f" a& M1 R ]
/ Q4 c4 V1 K. rend2 F7 k1 I. P; B4 P9 p* V7 B
to setup-patches7 h. X1 b! x& C4 l
ask patches [ set pcolor green ]4 f! I+ C) x% c3 k4 G7 v$ G% g
end
: S! u- W, Z: U2 z% fto setup-turtles" q' y, Q8 X% m
create-turtles 100, ^1 h- ~* q5 Z, ^( u4 p
ask turtles [ setxy random-xcor random-ycor ]; U: p' @' L) n( `# @: d2 [& C2 I
end1 e! V& t7 X' K! P7 i
to eat-grass8 _' n! M2 Z" s4 X# l
ask turtles [; {; N0 `/ W$ v0 K
if pcolor = green [" e+ t6 b0 p/ b/ B& A7 ~
set pcolor black: y; o; c6 Q a: [' c! q3 f `3 h* M
set energy (energy + 10), ]8 l2 j6 C4 {
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ifelse show-energy?: P, n9 _% y/ z6 a! |6 a- j1 @7 ~
[ set label energy ]
* q) ?2 I9 _+ X" A4 S0 S3 c [ set label "" ]
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end
" @& `: i6 t$ @3 H2 Eto reproduce- w) \9 U" d' s$ n
ask turtles [
* g' l {- M* r. v' ` if energy > 50 [0 x& o1 [6 C2 W2 E' O' g
set energy energy - 50
- A% b: w0 E9 u2 m u hatch 1 [ set energy 50 ]) Z5 Z, l0 o3 h& A; i: F( Z G3 v, l* w
]
9 N- g m. c. g5 ` ?4 i- m7 l ]
M) m1 f" S! b$ {. W3 L1 Dend6 ~: P, b7 L. Q/ D+ A) h" S s
to check-death4 ~( q g1 f- B* n% F5 V" A
ask turtles [
' f7 `& k U$ N if energy <= 0 [ die ]! Z1 N$ p% n! ?, E
]
5 _$ y' c% x8 j$ j3 v; i2 V2 Oend
4 l" m/ U% ~9 j$ \to regrow-grass j% i9 ~* b& D" {# | A) W5 N
ask patches [
" L* W- v7 h) i if random 100 < 3 [ set pcolor green ]9 o. t' F7 D7 e' M3 g3 I
]
& w! Z/ i" i& L# Lend
$ [0 O7 {. M& y& eto do-plots0 d: P" M' J: C" L) L, Y+ K3 w
set-current-plot "Totals"4 x4 f' c) Y0 w G- @
set-current-plot-pen "turtles"
: d- E3 T u( X' F/ {* o) [! ? plot count turtles
1 f! p1 l9 K p% s/ K' R: O5 p% _ set-current-plot-pen "grass"
8 A0 ^: B) M& O2 D' C, E* C plot count patches with [pcolor = green]
& t4 ]$ P# @9 j4 i- qend6 j# k4 l5 g; B; ^! Q
可是运行时提示no such plot: "Totals"& g8 \# a: x, r* a3 G
error while observer running SET-CURRENT-PLOT+ c6 e9 i8 s, R/ D. Y4 `9 D
called by procedure DO-PLOTS
' o& L% [+ Q# f# z% Y/ y called by procedure SETUP
$ L+ P. Z! O+ W( D called by 按钮 'setup'2 a$ g3 ?2 g" k1 J* C5 N/ U0 g/ l1 g
求大神解答啊 |