我编的程序如下turtles-own [energy]: D% U/ F- z9 ^+ m4 h) R+ D
to setup* K/ S' N2 E% R9 v
clear-all7 h7 `4 H* [4 L" Z2 |- B" j
setup-patches
! b4 A* i4 X, B* S9 D$ h* J2 ?: O create-turtles 100
& }1 @8 x% {) P- c do-plots
# y, _3 N3 q6 q' L. U& ? ask turtles [ setxy random-xcor random-ycor ]' Y7 M% D& C6 c B6 s
end
. s6 N' r' j8 M( h$ Y' I- Rto go
2 |8 k* x* \! Q- G move-turtles: E& F& o2 q8 P5 |8 l+ B3 p
eat-grass
! p! b, E% t- T reproduce
0 H% ^% P/ i; W, _2 i% E% [6 p check-death! ?6 b2 e$ m1 t1 X
regrow-grass
7 P2 @; p! f W$ c do-plots
% K3 I# U; Q7 `# _end3 w1 R) o: w4 H2 x% n; N8 S
to move-turtles! _* @6 p: i3 S" I
ask turtles [3 X) i/ ~, T/ |
right random 360$ e+ |1 A& I0 U0 A3 @
forward 1
- ^) `# z# B, x( s, F' p set energy energy - 10 f; k% j% L# r% c' {1 H
]* `9 \; Q/ G+ r( F1 X
end
' R, _+ S& q" wto setup-patches/ [6 ?: f* |( m9 V! {( ^
ask patches [ set pcolor green ]
7 _4 U3 d- c: R8 J6 K- ]8 S3 Dend0 \. ]; w: B/ o, P
to setup-turtles: j4 n% J: D v
create-turtles 100
# \( p# I# ?7 a5 _ ask turtles [ setxy random-xcor random-ycor ]
) L5 ]! {- k/ x0 r2 iend: E \. j0 E f3 X9 a& i3 z3 D
to eat-grass
: `5 i7 a' g- M5 L. c* Y! o/ k ask turtles [4 [5 y V5 k6 F" ~% L/ O& }
if pcolor = green [5 g. x2 i1 @ X; P
set pcolor black' Y, L7 L+ d/ {3 M# p+ X
set energy (energy + 10)$ j4 T) _. @, O4 P0 {" ^- F
]
9 G8 [! o; \& s8 ~) X ifelse show-energy?* [% s% G' ^, S9 @) P9 T
[ set label energy ]3 \% l5 W/ P$ q* q6 x
[ set label "" ]% K! H. m! E8 S) T
]
: F3 V+ I6 D, m- l# Pend- L2 W# s. ~" C% E
to reproduce
; L! X" r0 ~5 P# h* m" I ask turtles [
# W1 Q" m, y4 f* M+ \& C5 T if energy > 50 [
% [% }& a$ q: `2 W* M set energy energy - 50
; B% \! C8 ? w! ?6 c, V9 w7 f hatch 1 [ set energy 50 ]* [8 T, q9 h3 o N2 ]/ p
]
5 Y7 e' q' ~( g ]
6 h5 i# e/ m0 A7 ~ v4 Y" _; P: Vend
0 y) f- U6 c4 Q) @to check-death
1 B' d7 A7 ^- k+ ^ ask turtles [
& v1 a' s' A' B; _+ U if energy <= 0 [ die ]
( [ M" `! M9 ?- ` ]* M# z' C7 h' ~+ s2 @1 _. O/ s5 t
end& n! n v* `7 A$ t; r1 S
to regrow-grass
! V& n* t* ? d0 y8 L: _ a ask patches [* h6 n: C& b/ S. O
if random 100 < 3 [ set pcolor green ]3 A4 W9 g/ ?" |5 C
]
5 y# y* p* n6 p! p- Z# h, Y! p7 @0 zend# R; p( C: d" V# D/ U
to do-plots7 @: v6 Q# j, O2 Z: N4 z, O+ F) n
set-current-plot "Totals"0 _* f( t4 O# x, i. M8 }0 ?* H3 {
set-current-plot-pen "turtles"2 |! P/ {1 R. O) _* f0 y6 B
plot count turtles
, F8 H5 l& f" [4 D# l set-current-plot-pen "grass"6 @' |3 ^) {: w8 h% g" o
plot count patches with [pcolor = green]
$ h+ B7 ^6 Z" j& c4 m. I/ qend
" @! b# R2 E8 G' h可是运行时提示no such plot: "Totals"- k% ]& t% T7 B
error while observer running SET-CURRENT-PLOT2 \' ]$ x3 E( i
called by procedure DO-PLOTS
: v( ?0 {* A4 q, y8 k% z called by procedure SETUP% }' o: d% U/ B% ^% a' l" V# j
called by 按钮 'setup'
. i5 _+ J$ D" B: K8 O" f7 p; G求大神解答啊 |