我编的程序如下turtles-own [energy]
6 O% b! }* ~ ]8 s! y9 Wto setup
2 J# C6 e4 R% m clear-all4 U# i- t7 t4 q' L: e
setup-patches
, T6 m; P- Y7 i) J3 | create-turtles 100
2 z6 {! ~$ V: p) j do-plots
: Z0 a. D5 E# R' g ask turtles [ setxy random-xcor random-ycor ]
6 a! t0 @# s( V* Q9 k% \end
: I3 `& G$ ^ n l/ c( ^to go/ @. U/ G$ n0 x/ y3 t
move-turtles
; b7 ^3 S1 m$ n( m0 \ eat-grass
0 t e/ q7 v& `7 C* ]7 v6 R4 _ reproduce I4 l4 y# G' @( H5 S
check-death F7 f8 n+ y9 s9 t
regrow-grass
3 B. U j2 `0 ^0 T7 D# q do-plots* P9 b' m/ ^' _2 ?5 G6 V; c1 j
end0 p _, ]8 Y! Z! e( X: T( y0 H
to move-turtles; t/ Q3 { X$ P# g/ ]# U
ask turtles [
2 H( Q/ I. Z, u$ ^& j% Y* f right random 360
# ^4 J" y1 H/ O; J- H forward 1
; G. C6 |3 ?4 h' b L$ f8 |0 s( U& U set energy energy - 1
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end& z8 W! [" H3 ?: U9 X; s
to setup-patches8 J8 g7 {7 V v4 h
ask patches [ set pcolor green ]
$ y% {' X- ~1 X9 ]end9 {4 j; n4 ~) M8 k4 ]1 T
to setup-turtles
3 e0 y) e7 N- `& {; L/ j" A% w; n create-turtles 100/ E2 ?1 Y! h4 I v
ask turtles [ setxy random-xcor random-ycor ]
) y& n. X$ i$ p+ G3 qend
3 A) l ~. q+ X; ?to eat-grass
9 o/ V' H; V" e- X( M ask turtles [1 \7 M! S" E4 F' G. C& g6 L1 K
if pcolor = green [( P. M2 ]% }1 `; a! q( n+ N
set pcolor black
; n/ L& f8 [* m" \8 K9 |( i9 B. C set energy (energy + 10)% G5 A8 Q4 D" _: s& ?
]8 [; L* s2 H b) ^ [, {- Y
ifelse show-energy?
- s& w/ X3 T7 n) r% h [ set label energy ]
0 w5 O9 n9 r( G2 \# _ [ set label "" ]+ v- W; n5 g# C, K8 O. Q
]
9 {# u. ^9 N" [9 C0 dend
+ E) M* q, t; I! ito reproduce
+ I/ I5 c2 O" s3 c7 [0 B ask turtles [
+ o* [# J% \' t& _5 [4 h8 ?! P$ n if energy > 50 [
! T1 b4 ?* G- e4 H$ s; V. | set energy energy - 50
# ?" G3 |; b8 Y' b hatch 1 [ set energy 50 ]
% S9 p& s% b2 e9 d7 e ]
( |4 m0 o( v R( i" u& I4 c8 F ]
0 D% z7 J+ R) F. |0 C+ [end
, g' f# J/ ^6 J7 yto check-death2 S% V% p- d8 `
ask turtles [% J7 `7 U" I: F" [5 ?) `
if energy <= 0 [ die ]
/ m. S6 X9 x+ _4 q- @4 Z0 W3 b ]
4 G+ x2 A! Y1 I6 Pend3 W* m( \! R: R
to regrow-grass
' K/ C4 {. K, W r ]5 o- m ask patches [- S9 A, @: E/ {8 q5 r9 u
if random 100 < 3 [ set pcolor green ]
, U! E, O0 A0 i* d# W5 g( r ]' M8 V% n. |: Y
end0 N3 }. x$ s3 f/ j+ z# p& f
to do-plots
) v3 Y" T$ G K A: q set-current-plot "Totals" ?/ [+ P+ {3 n) n
set-current-plot-pen "turtles"- i+ y F4 i" |+ Y O9 E$ i
plot count turtles: x0 |" Y( p& v
set-current-plot-pen "grass" a; U' |) c( [$ K4 t
plot count patches with [pcolor = green]) t' V% g! P' Z; V+ j' U
end
( @9 {# Q2 ^6 k' ~8 [7 N可是运行时提示no such plot: "Totals"
& i8 m3 N6 q S1 R: b, L/ p! Merror while observer running SET-CURRENT-PLOT; H! V# o8 [2 O! F
called by procedure DO-PLOTS
; I1 ?3 v) A3 M% K) o+ T; C' B8 ` called by procedure SETUP" R( S0 S$ J6 {8 W) U
called by 按钮 'setup'
/ K1 }+ r1 o0 q, f* @求大神解答啊 |