我编的程序如下turtles-own [energy]
5 x$ x8 Z$ v7 m. x* G7 p! Kto setup8 `8 P: Z) m8 h3 ^: c
clear-all- ?4 o+ t6 \2 e% d
setup-patches
, Q! t, ]' M5 i: ` create-turtles 1007 h; Q1 H/ a$ A3 p2 E0 l8 Q' @
do-plots2 b) n" o# s4 G( f
ask turtles [ setxy random-xcor random-ycor ]1 I( p9 P% B* F& s- a8 E
end7 T* B9 c+ s4 \6 O) P1 D
to go6 W2 @, O0 o1 X6 j8 E1 f
move-turtles+ ? F7 G1 ]6 E) N Y
eat-grass( K9 h% a$ @8 F7 d
reproduce
( H3 Y1 l2 i+ I+ X( B( x( z check-death
" N3 d2 A2 D# b E. x! |9 o6 w regrow-grass; A& {4 P7 }5 u9 Q
do-plots
' j! r3 e" K8 d. D5 Oend* d$ B- x5 z# V* ~* ~" }* X
to move-turtles1 \. z) L* A y: i
ask turtles [
7 R3 g8 O% M3 B% R/ }, q right random 3608 M2 @6 I6 Y, n/ f3 n
forward 1
( _ G0 C, h* V0 l set energy energy - 1 v6 r4 |0 z( |& Q3 v5 r# t0 @: v1 q
]
" n5 p$ V. Y6 i! v! ~1 N4 yend0 U+ Z' l* R9 A# d2 N. C/ U
to setup-patches% G6 J9 M! I. m6 U' K
ask patches [ set pcolor green ]; l, q y+ j$ ?4 ]- ]
end! N, _/ G, t0 S/ r; ^
to setup-turtles6 V c; ~: W) R8 Z J( A1 R
create-turtles 1006 r! U& w8 ?6 `+ b% Y
ask turtles [ setxy random-xcor random-ycor ] S& Q; \# r, G* m8 `
end6 Y" k7 |+ C8 I6 t' p( r+ H
to eat-grass, s# x6 T8 R- U( V; @ G* P
ask turtles [
1 k3 R/ U( s5 i5 W, D* \ if pcolor = green [3 o; t- A7 D' h4 W7 L7 A! V
set pcolor black
' t0 q \# L. L set energy (energy + 10)% D( r. K: S, T. g: o2 p) P
]
~$ h8 x" Q9 P' p ifelse show-energy?! n! M! z: b$ Z4 u
[ set label energy ]
8 E+ j7 c/ @( {' c. g [ set label "" ]$ H$ V; y3 @+ ?6 e, ~) \! u
]9 T( w% r8 I8 S- [5 K3 c
end
& H- J: q/ s: v$ l J! C% zto reproduce
5 {$ t9 t9 I2 g m, j6 x ask turtles [
# g- M" t& {/ [$ B, Z if energy > 50 [5 S+ ^6 H' b, g
set energy energy - 50
* h9 @0 K. y$ e7 R4 K. ~. C hatch 1 [ set energy 50 ]* I- g% y+ `6 q1 ~# _" L; C9 k; T. X
]
# k4 X! `, J" N4 } ]
8 R$ m- X- _' F, Dend; f" [! {6 L; c6 [5 J
to check-death- s4 c$ [' r j7 g
ask turtles [9 \( g Q) s- a# V3 l: W
if energy <= 0 [ die ]
5 v+ i7 w$ N: o$ N4 B, F7 H ]! i" l) O m; d
end, G5 p% T' Q- Z8 R3 A" ^
to regrow-grass* _ |1 R ^! T" r6 |/ {
ask patches [: U& v6 I, M) T! d9 M1 w" s
if random 100 < 3 [ set pcolor green ]* k3 u; a0 j$ x4 G0 z2 D3 Z
]) J7 V: w x6 s# t' N/ L9 t8 ^$ w
end4 K$ F7 z/ z! P& _
to do-plots
$ t3 b) y, |( K2 a% |; V set-current-plot "Totals"
0 U4 D* D8 V- }1 i set-current-plot-pen "turtles") A5 _* M3 \( V6 R$ K! r; G v7 ?/ U
plot count turtles) ?4 R4 [: r2 f5 [# j
set-current-plot-pen "grass"
* {, x2 H1 B% X! b$ F3 v: ~ plot count patches with [pcolor = green]
/ s( k& h1 y; \) G9 ~/ Tend
( a! j6 m4 W! @7 }可是运行时提示no such plot: "Totals", G5 e" H* x4 g% }
error while observer running SET-CURRENT-PLOT+ `. E# k4 O7 } r9 G. \0 b+ [
called by procedure DO-PLOTS# S& s0 Q1 H! M' A k7 X- y
called by procedure SETUP
. W2 R: g1 @+ Z$ s called by 按钮 'setup'
, p2 Y9 y2 {0 E* F5 ]求大神解答啊 |