我编的程序如下turtles-own [energy]' V" [! X4 @( G- L5 r/ U
to setup a: ^- e: M+ T& j
clear-all
, v }! F& u3 a" ~# ~ setup-patches
# y5 r) L+ v4 U9 B( l' O create-turtles 100. j" a( y! o, a7 w
do-plots
" A `7 v( C8 d" ?- t8 l ask turtles [ setxy random-xcor random-ycor ]
+ k' ^8 }& @# D8 lend
& V$ u) E4 ] Y1 X; rto go
& Z9 e/ F" F8 P. t6 A, G! s3 o move-turtles
% p7 I; @/ S' M) ^* r/ s eat-grass
8 [' M# x% N h2 K, t reproduce
* Q% w2 u5 V5 x( z5 {* d check-death
- H0 q' y2 g, z+ p9 K regrow-grass" h& O5 m: I4 k e7 h
do-plots' I) L* \1 ^5 g# G; D, n/ T
end
p8 D* C; i/ w2 r* h! Hto move-turtles' }% z" `& k7 ?, H5 A" b
ask turtles [
B- o9 ~+ e6 L# M2 }2 L# W right random 360
3 r+ h7 q% z7 u" H! Y, B% b/ C forward 1
* ~8 a2 k# `3 g1 i set energy energy - 1
$ r# _2 B! |1 N0 V4 U- l ]
/ D: R1 N2 l' Q1 u7 {4 ?' R6 Xend
$ R: P7 _( } Tto setup-patches
9 F1 _; m! V- m+ }9 o& _9 G ask patches [ set pcolor green ]
+ }) y6 [. X0 x( Z& fend3 s$ T8 N# A, u. m: \
to setup-turtles, V2 f; E1 L3 g
create-turtles 100
1 a3 Y( e, n* u% b ask turtles [ setxy random-xcor random-ycor ]% x6 ?5 J& Q" L1 p- n
end) x* e8 k6 W6 }$ D E' I" R, a4 }
to eat-grass
7 |, ~$ M2 Q/ [3 t! w b- h6 n ask turtles [ M' W% v! w$ u( B$ m; h
if pcolor = green [+ `% E* {/ R6 {3 A
set pcolor black0 ~, w. j& o. b9 r1 r7 I
set energy (energy + 10)
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ifelse show-energy?
5 D% C$ H0 y: @9 e [ set label energy ]
N0 M B8 {0 x, a7 X7 T7 ] [ set label "" ]
+ d1 l/ B" w) z ] O0 U5 C, G- U6 Q7 D7 Q' ^! j
end
& L4 n5 n9 G, q) \$ L, J$ o/ w7 Gto reproduce
; y( B/ x" Q K ask turtles [/ i1 y; |) o v+ `+ e& K3 q& ^
if energy > 50 [" D8 H8 y* S9 n3 W- e* [
set energy energy - 505 M7 _. ]& b. t' B; i# j
hatch 1 [ set energy 50 ] O! [; R0 f4 P! F9 ~
]
! [3 y8 e) Z- |4 _6 J ]
: Y8 N: [, V$ a1 q: I( H3 D, s& J0 xend, d1 m' k' F8 m6 V" N9 a" `3 L
to check-death: Q) k1 r* |1 r; H9 O
ask turtles [
: C5 b1 }+ s& `- z' m if energy <= 0 [ die ]6 K4 Y/ m0 e0 x8 ^9 b0 F
] b+ D" I- G1 y
end0 B! z7 T0 `, o! r! ]
to regrow-grass
% j; p* |; C( T/ M ask patches [
2 K/ h$ ~4 S' q if random 100 < 3 [ set pcolor green ]
6 P6 {; z* r8 Z' A ]
3 [7 G: s5 D5 V3 vend. W1 G9 L& s( w4 a' n4 [& [
to do-plots6 m- K& p4 x$ W9 D& m4 f! e; `& }: @
set-current-plot "Totals"
3 o' p- _7 g# f8 \7 m N! ~0 O! H. T set-current-plot-pen "turtles"+ G$ K" O( e r6 f+ j4 A
plot count turtles
: A0 c% Q0 K+ I- ?6 g' \. U; E set-current-plot-pen "grass"2 w2 ~# o. U$ x2 U& B
plot count patches with [pcolor = green]. `& _! Y6 Y# b4 E4 R6 v& }* z
end: B( c& d( Z2 }( O6 ^% I- k
可是运行时提示no such plot: "Totals"1 A' \9 o+ ~7 v0 G/ [
error while observer running SET-CURRENT-PLOT
0 \/ \) v# g: h! v called by procedure DO-PLOTS
; s' h# F! b+ _ called by procedure SETUP
4 w* I7 d% w& f called by 按钮 'setup'
0 _7 T' R I; \* r1 m( M求大神解答啊 |