我编的程序如下turtles-own [energy]
g, r$ @! m* e# y5 i" zto setup! q. R8 B' N: l
clear-all7 N4 _' _0 X2 U6 E, G' q
setup-patches% e3 U# n9 ]4 ]" N
create-turtles 100
( n: V: a, T Z% @: X2 X6 ] do-plots
/ e! o9 T% y' X+ l. w ask turtles [ setxy random-xcor random-ycor ]
& y& b0 U# w# v( ^. P$ ]end
. ^ B3 ~5 s' n* \" K( uto go
W5 {# R5 z* k* z* @! |/ \ move-turtles
" ^0 W1 m& Q$ R$ `3 x eat-grass6 P- a! M F5 y2 T0 C
reproduce
- t8 F4 S2 B1 D6 o& u7 c5 Y3 L check-death
) U0 h3 Z& C! D/ d% x% ~ regrow-grass( {3 N2 U+ O. o( j) S
do-plots
! |* A6 e N2 T* {9 Y, U9 A) N: m9 `end6 ]& U* R, V+ N+ O/ v. _
to move-turtles
) V- p3 \) @: r: `& P+ @1 d/ [# q ask turtles [
: n3 r) |1 V5 ?- X+ G a right random 3603 r( {# \$ h/ j; r
forward 1
7 w7 d' k/ p& K set energy energy - 1
% @- g' S# `7 K# \# j* M" W) N ]. c$ B8 `3 V% g
end9 _2 j1 U' Q$ Z) I
to setup-patches+ ?1 e% I6 |- G+ |, Y5 k C
ask patches [ set pcolor green ]
2 D! ^' ?9 M' @5 i* M* Eend
, X/ A9 t* o: |0 v5 M5 Ato setup-turtles# C1 D; P6 l9 G# y/ a. y
create-turtles 100( B( t. h4 f g) P; p. Y( \
ask turtles [ setxy random-xcor random-ycor ]
' W: f c9 y9 ^, z# j/ J. zend
! v5 g* F9 X0 L& |4 S+ C+ @to eat-grass2 U* z& A- Z' Z5 N W1 O! w
ask turtles [
- y4 h* ~- P: v if pcolor = green [+ ]; a8 D( `2 W+ S
set pcolor black8 |8 v" c+ N; V3 {
set energy (energy + 10)$ ^# i3 U! p' w; ?& Z, S- U; b* Y
]
1 ~8 f% b( o. N4 O0 @# }" z6 k7 G ifelse show-energy?
# ]) W9 a9 g5 ]+ y9 Q [ set label energy ]
1 R9 z% z( D; l [ set label "" ]
/ B H$ v* P6 B9 o; _ ]
& o: d6 _1 m6 g+ e1 a# N/ H! i9 I: Hend& S3 l& O+ M1 V
to reproduce. U( ~- d, Z/ v6 y
ask turtles [
& c; I1 F! @7 x' u4 b! Y, C if energy > 50 [
& s. {% _# R6 d8 R5 J: V" S set energy energy - 50
# x. S' m0 Y; [& A1 [( A8 f hatch 1 [ set energy 50 ]; p# d* ^( f1 f
]
+ g9 j4 \1 R$ n' P) e0 r ]
; K2 n4 d! O+ `$ c \) O8 d& k& {end, R& Z* T' c& H5 w' a: |
to check-death, S7 I+ @! ?6 Y2 L. G+ j
ask turtles [; R6 L6 d8 g6 E" p7 e2 e
if energy <= 0 [ die ]
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end
2 ]4 ]1 _0 a% Yto regrow-grass+ P D, r; b' E
ask patches [
# b( ~" j* |6 W1 C" l if random 100 < 3 [ set pcolor green ]
: N' m/ _. K2 S5 q$ W ]/ N" z) f9 E+ C% O' M) h% X
end
& e( _# }% I/ B1 Q# Fto do-plots
: e% d/ ` P! |- Z ^ set-current-plot "Totals"0 s# g3 r% U9 M* S+ `/ O2 W$ }
set-current-plot-pen "turtles"
( K. l! _* u7 M8 u3 _ plot count turtles
9 ^ R1 H5 w! @4 R! N* e7 d set-current-plot-pen "grass"
2 a6 u% a! U. M$ M5 G' ]' H plot count patches with [pcolor = green]; ]% a' n3 p2 Z8 p4 d9 T
end& D) k& M4 U/ B* C9 P
可是运行时提示no such plot: "Totals"" Q8 \9 j8 ?' e$ N. S9 z
error while observer running SET-CURRENT-PLOT
. C; s/ m, x" @; R called by procedure DO-PLOTS! d/ o0 F( r! r- p t! I
called by procedure SETUP
4 ~8 d/ E' C/ m# f. |0 ` called by 按钮 'setup'
5 }* M! ~5 w) E9 c6 U1 N* Z/ m求大神解答啊 |