我编的程序如下turtles-own [energy]/ m! N* W" M: ?, ?: U0 t- V% J
to setup+ R. j: j( Y C; h% D
clear-all1 i) l' c l2 B! N0 r: B% {0 e
setup-patches
, _' @ `/ K- K# J create-turtles 100
& L# I" r' F& ?+ n do-plots K/ W( E$ A/ {/ }0 y+ ^
ask turtles [ setxy random-xcor random-ycor ]1 c6 j$ W9 E! y. t3 N
end
" b z6 V& W0 ?% e3 T0 [to go
* _1 A2 ^: Z9 k move-turtles( f: M7 A3 g8 a( b4 b2 N8 m" q
eat-grass
0 \6 ~) W6 N) {7 R reproduce& S6 E/ z0 o/ e7 l0 m6 H o: c" K3 j
check-death* y8 U+ k0 Z4 U5 r9 F! f
regrow-grass
' ^, y1 C4 M" {9 E. j# r* s2 y3 } do-plots3 h9 ]' b8 y. l1 ~
end
. N& F' d" ?# U2 j9 [to move-turtles
& d1 y& L7 t# H& S ask turtles [
- T X+ r6 M2 L* V- V$ ?" X D! p right random 360- ]$ k2 N+ I. o
forward 1* j' M0 q$ X0 K- ~0 o# ]
set energy energy - 1
" T. U5 l5 b5 [7 f: }' j ]2 b8 b9 ~7 `/ L6 c* q4 o! K
end) Y! J$ e. _! {( s7 d9 C
to setup-patches
t2 Z+ e/ f3 e( V. S. c+ _ ask patches [ set pcolor green ]
( U8 F# R n. w5 yend! l' j( Z# M: U9 W; u, N1 r
to setup-turtles9 R+ {, Z- f! P
create-turtles 100
6 N/ J$ c% g- ~' F" s ask turtles [ setxy random-xcor random-ycor ]
. P, X0 @7 [ T2 hend! l) S0 _5 m8 [
to eat-grass
" x9 r+ I. B, s! r# s! a ask turtles [9 G x4 C- d. J, r2 F; p$ X
if pcolor = green [( {6 }/ Z, X* h5 W
set pcolor black6 g! E; Y9 m1 }3 p' W E( y8 f
set energy (energy + 10)" r/ U4 o8 S& f& k8 f) B
]
4 w1 Y$ Q' w3 ?: P( ~ ifelse show-energy?' [* H: J% g* V' j
[ set label energy ]+ ]) q/ }- q; K, g. i
[ set label "" ]1 C6 Z. l; L, P5 j/ [& X
]+ ^% ~" m) p2 p, z2 c5 V- Z
end
Y" a) P# W. U+ p" g4 N2 B5 vto reproduce
2 w# P) Y) c: b( o$ Y ask turtles [6 G5 b" B4 z: u$ R8 K U2 o7 v
if energy > 50 [3 i, B% v) y$ t [# F; n
set energy energy - 50
; D' f* R; O1 C# `) } hatch 1 [ set energy 50 ]" Y- K1 `; V7 ~# u
]
3 B s" W, Z0 p. h ]+ C ?6 U; c. h: b; ?7 F( c
end
. U+ l0 m7 `. s& w b9 ?to check-death& R0 [2 n! U, G
ask turtles [( V9 E2 i: L# D7 i4 D" R2 G
if energy <= 0 [ die ]
2 n6 k0 n4 R7 G0 q/ C9 i ]
, b! t/ p& L. ?% X% Dend
1 a- H3 i) d$ V. ?: tto regrow-grass
/ M) L0 L4 ?6 K9 N. s) e ask patches [3 |" ~& X, W3 |* T( U
if random 100 < 3 [ set pcolor green ]1 P! s! o" p7 g% K, y t3 d5 ]. p
]
- V7 z B) V/ A& {end
& G8 J4 B2 Z' y9 _" eto do-plots
3 J2 q0 U. C! s! H, G) y7 C set-current-plot "Totals"! N2 k- w7 r% r, J# X2 f$ q# P; ^
set-current-plot-pen "turtles"# y3 ~" f- [; B; }; Z' G
plot count turtles& Z4 R! l' D G- w! V* A+ ^& R
set-current-plot-pen "grass"
, g& [" I# n: g" e: P plot count patches with [pcolor = green]
/ E0 Z0 N2 S( w! ]7 t" y. qend* w5 j$ ` O& }' R+ n& g
可是运行时提示no such plot: "Totals"
$ M8 B8 T+ O' O7 x* y) Q9 w1 |error while observer running SET-CURRENT-PLOT
, o: ?3 H4 o" A `& q5 O8 j called by procedure DO-PLOTS
, m! L' }; i |: L called by procedure SETUP: O5 M. l5 \1 `; j# p
called by 按钮 'setup'
p* S$ j1 y3 a) J* P( R3 b求大神解答啊 |