我编的程序如下turtles-own [energy]; |5 ^: D$ V' E+ M7 {7 i1 P" P
to setup9 J4 ~0 h1 m) B9 I, {. ]
clear-all$ {* v% u$ F" o( x0 h+ {
setup-patches
4 a3 H7 K; ?" y: X! G0 C create-turtles 100
8 q. y0 y& }4 H: [' Z2 Z, S0 L/ Z% r do-plots5 m# ~0 L+ i0 ^' e; ~
ask turtles [ setxy random-xcor random-ycor ]
3 l% y" X1 i- m7 q9 D( mend) K6 a7 K9 A" Z7 N; g' V3 l
to go
% \# ? Q/ Q. p9 h, q move-turtles
- M0 W' `/ R0 j6 y' B: ]* c$ x) R0 h. j eat-grass
: J+ ~8 }( }; D- W$ R. _8 l reproduce4 M( O9 \$ _) A/ r
check-death- q9 W7 s. v: z) @! ]; N1 `
regrow-grass- [, R4 ?5 y* \( l
do-plots
X5 d: X* ~3 u# C4 ?end
! E. D# E. W5 C! |9 m. Rto move-turtles
" v' f: X* |% W& r ask turtles [
O0 H7 f; j* i! k( U: I4 q8 V right random 360
6 \, P1 ?7 \! l forward 1" {. v0 U) Y% W
set energy energy - 1' v$ N' N7 S3 G# H" i7 X
]9 i8 M; c" ` P- P5 O
end
' s3 C5 E" B: D" h/ q, C/ n' ^to setup-patches
; {2 O; S$ e) J" z, i ask patches [ set pcolor green ]
* i8 X' j. R! \' Nend# J; N8 I9 h1 h4 I% K( S1 i- o
to setup-turtles* K7 o Q# f# g' W: F; Z' w+ N7 W4 e
create-turtles 100, p: k7 ?" g1 v, P
ask turtles [ setxy random-xcor random-ycor ]
5 t. j/ A, d# w. r; Gend
2 l& g4 ~2 E' D" \to eat-grass
! I7 u8 @7 K5 A2 R4 A- A ask turtles [7 }9 Z1 W. h p' n
if pcolor = green [
! N, H% u0 V3 A& `; @7 B5 X: g- H set pcolor black8 |0 L3 i. ~! m; Y: O$ }2 o1 f
set energy (energy + 10)* @- e6 I5 p( `$ h8 z9 C
]
7 U9 E/ k8 o1 L3 A% G9 e ifelse show-energy?
# f. s. B" ^" [$ }6 ?' e [ set label energy ]
0 U. W5 R9 ]5 W [ set label "" ]; y- k( w% P6 _( e
]
0 Q F; Z9 Q# }8 ~0 ~end
* {; H: I/ N1 K+ {to reproduce1 {; P9 T3 H8 b- q ]3 I$ z0 m. ]; ^
ask turtles [
) a3 i, F* e' W if energy > 50 [
4 f6 }2 [- {4 R Z! P set energy energy - 50! E" F3 q4 b3 Q4 l# t
hatch 1 [ set energy 50 ]
5 T0 E: W; n R6 D! C ]' s7 V; O, D( H* @
]
! ]9 f0 a, ?+ B/ ]end6 f! h u2 E8 ^8 R/ s
to check-death7 u9 i9 p7 h6 f9 |* E
ask turtles [
6 ~" a3 R8 J" y$ | if energy <= 0 [ die ]- g4 U/ _& c3 J2 l! R
]- ^+ p @8 G' }( n3 w7 X1 }1 ~
end
+ X: Y7 Z/ P7 D! l7 \1 p% _! Tto regrow-grass
5 o, y" i: k" E ask patches [
% C9 G( n& G, H8 M8 {! z8 E if random 100 < 3 [ set pcolor green ]! U6 z" t/ g2 M4 d- ~
]
/ Q. L4 U# }3 j% M; o1 I& Yend
' y; i7 K( h2 _# n: D. H! [. Uto do-plots+ d3 x' ^' U# \+ p( }& L% w; t& N3 ~
set-current-plot "Totals"
6 u {: d' H( a1 Y: Q; h+ x set-current-plot-pen "turtles"7 Q/ N2 u* {8 T4 |( T8 |
plot count turtles3 A+ M6 j4 T5 ?& O
set-current-plot-pen "grass"
" n( Q8 ?+ H1 ^! R6 S- n P5 P plot count patches with [pcolor = green]" i: C U& S. A( z& U
end
) I" j) s7 F' g& c8 ?可是运行时提示no such plot: "Totals"; R' S+ k$ g [1 s8 Y
error while observer running SET-CURRENT-PLOT% j( ^& K4 V u! d }4 n
called by procedure DO-PLOTS; i! A# S4 \0 V! G* r- K$ `
called by procedure SETUP! F, c9 P8 j: }* U2 e
called by 按钮 'setup'
4 j. U4 r& _* v, {; ~求大神解答啊 |