我编的程序如下turtles-own [energy]. |) }% D% e* ` }% V
to setup: `4 C; K! ?( B+ n7 u0 G
clear-all
, g' T$ Z, e( Z) c setup-patches5 U! s% ~' L) e# |0 _( \( y' p! S
create-turtles 100( `4 f6 V, n/ @0 V: Z
do-plots- ^& W: v# w8 X. o
ask turtles [ setxy random-xcor random-ycor ]- m( |* ? X; d. k. l( s
end
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move-turtles) F8 y8 \: S0 N' I1 { R6 i
eat-grass
# Z; h7 X2 t; W( i reproduce
3 i5 b' G6 C4 j; J& A; |4 P check-death
; C+ |, `: ?5 y1 U. P regrow-grass; H8 V8 R, A9 j) w9 G5 t6 ]
do-plots
8 o! q; E4 U: N4 {end
7 w1 y+ A0 l! H7 d% c" Cto move-turtles( m9 t Y! X+ M; T6 x! R F
ask turtles [, [' {1 b9 Y% j- s6 ~' d
right random 3601 Y! U, n! J. C$ m/ X) J& F% m
forward 1' y! p- x8 s( R& ^9 @% Y/ s7 [/ L
set energy energy - 1
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) Z8 \& I) s' M, hend
6 G$ A! P: T8 A9 i. P0 l. D# `0 l& Cto setup-patches
2 {% o, _* r) Y& i& C" {6 [. x ask patches [ set pcolor green ]
9 j3 \) J9 k* nend' A3 x: H% O; ]" m- y% G( N7 I5 [
to setup-turtles5 Z: b+ w" H9 j) `" B! m
create-turtles 100
$ C0 M* x- V: w, v s# T ask turtles [ setxy random-xcor random-ycor ] `& p' g" _& V3 M! `" H$ Y
end) [- I: \% n$ t, K
to eat-grass
& I9 u5 o+ R K# d3 C ask turtles [
- e! s$ l5 e5 `& d3 i) T& ~ if pcolor = green [& `! t/ E* g7 I5 e8 s9 K. E
set pcolor black, r3 A" g# g# f4 H1 L
set energy (energy + 10)% K' R4 {7 z/ x' T
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ifelse show-energy?' k; K! V6 j; ^( _
[ set label energy ]4 e/ i- G! }* _$ i0 L
[ set label "" ]
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# @' b0 q: Y+ s1 h8 R7 s& { Gend: Q$ ]% j/ t- N% m( ^$ f4 t
to reproduce3 X( \: \( H" o* t7 W
ask turtles [
% [( H9 u$ I0 ?# m1 G% h" [1 h' _ if energy > 50 [( P9 \( x3 f+ H+ h5 y3 {5 U
set energy energy - 509 T. b" ^3 [3 C8 j7 G
hatch 1 [ set energy 50 ]
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end+ o% n% j; v9 g1 B7 @+ w
to check-death
" @: T3 j( _. L4 K3 [) z ask turtles [- }+ u: Q1 c8 p9 C* D: V2 ?+ g
if energy <= 0 [ die ]2 I% V; C& [% R( l" t( b7 g) z
]
6 ~2 O8 c! P: Yend$ n% h4 x; L2 u6 S
to regrow-grass4 u, u* `3 W& u6 E( R6 j; X
ask patches [
7 S. N5 v" K5 ?" E/ U+ c+ } if random 100 < 3 [ set pcolor green ]: y" a+ ]$ k0 I5 L
]
+ \, F+ l1 T. H# G# s) uend# a4 |# {$ Z2 Z. _6 X0 s
to do-plots
+ e$ y0 z4 m. [" L set-current-plot "Totals"5 V3 W6 q- _( Q; K) N1 L3 [* R
set-current-plot-pen "turtles"
: e8 y# g' _8 g plot count turtles$ j1 B, v% O$ x7 s/ ?7 i( z T
set-current-plot-pen "grass". A" D$ E! i+ g6 A4 t# m
plot count patches with [pcolor = green], X& J a0 T% o+ g' z8 W
end
& N& X. b& _5 [- I: n4 v可是运行时提示no such plot: "Totals"0 y8 N" d: ?. k6 ]" X: g
error while observer running SET-CURRENT-PLOT' Y S! a' q$ B
called by procedure DO-PLOTS1 X' C$ ~; g! D
called by procedure SETUP0 A& F6 f+ ?6 c
called by 按钮 'setup'' J) i; X- w9 F; \) i5 i5 Z9 i
求大神解答啊 |