我编的程序如下turtles-own [energy]! S3 n P+ W! N# @' s
to setup
; d' z4 e+ V4 w! u clear-all
/ Y' w3 F' f; B setup-patches
. C, F+ m# e; `( S/ q create-turtles 100
9 V V+ b1 t2 L' P1 V do-plots8 C% v: `0 O# ^3 h! J# c6 _
ask turtles [ setxy random-xcor random-ycor ]
2 m0 h5 U/ E) S# F% Pend/ [6 d8 u! L1 D1 q% `% j
to go
5 V% r0 |" H; s% j H6 U& i move-turtles2 _# F2 h9 \) k7 W
eat-grass* V+ j c. N( x9 i. s
reproduce
. ?0 b3 m0 c: f! H& n8 \' V: e) Z check-death
2 p$ z1 V3 p W: J6 m: U: i/ [ regrow-grass( P; r( j$ V4 y5 ~6 K+ C) c$ z
do-plots, v; X# u; v6 y: Z
end7 D0 F1 {7 i2 e- _5 R0 o
to move-turtles8 q- m F% z1 Q6 T* F/ l
ask turtles [0 U% W# L+ q* x$ S) ^5 P$ o( m
right random 3603 Q) [& O9 I5 F3 z/ n. O2 J6 ?
forward 1$ H, o* V+ }5 P, v( _! g, x
set energy energy - 1
# ~8 I8 G4 p/ Y5 b ]) z5 R' D2 x& o3 X
end2 l1 M6 Q/ [& ~" m5 q% b
to setup-patches4 E7 [3 d# G9 [% S; z
ask patches [ set pcolor green ]
b% N6 \) Q# Vend
9 N- y1 ^( e: M. G' Z; Z1 [# Rto setup-turtles& S- r9 M+ K, D+ _
create-turtles 100; u+ g" A' }$ S5 j$ r% C$ B
ask turtles [ setxy random-xcor random-ycor ]' H6 m) ?7 J# M9 _' {- E* f+ x
end- E5 T, ~8 O& i- f0 o) |; V( V) O0 }) g
to eat-grass
1 }& r3 j! x& i ask turtles [2 f1 d5 r9 T$ G0 \5 `( P% ~/ V4 K
if pcolor = green [" U9 w$ R. W) B
set pcolor black4 F: J$ ?' h3 z& b! |3 U
set energy (energy + 10)+ G' F- C3 W" j& B6 _6 ]! a* R; }
]
* X( p6 z9 |: x4 U9 g+ | ifelse show-energy?$ \6 B$ }- ?' y! k/ H8 ~9 \% P
[ set label energy ]/ }6 X7 J# p& a: [/ C
[ set label "" ]
( _0 s# M8 n8 ^/ H2 n, p, E+ n& O ], ?' s" }2 R3 L, d7 }: U
end3 o. {9 x5 v# u7 U: W4 n
to reproduce
8 `, m& U% A$ x& R' h8 d& w; M ask turtles [% M) s8 i: z5 ~$ B5 p% I
if energy > 50 [
' F2 z) U) M- ~% `7 ?; }6 M" g set energy energy - 50& P0 ]. ^! N/ [7 B3 C
hatch 1 [ set energy 50 ]
5 ?1 T: R% s- m: d; v0 p) P: h$ F ]
7 m1 u# r2 }4 i ]
V: Y% D0 {! a" y% K: I! i% `end
) V* b( f) W' v9 Q) d7 u4 n0 ?to check-death
* o% f" P' r2 U# e: g ask turtles [
$ M: _6 c% A/ r) ^2 V, l4 Y if energy <= 0 [ die ]* i/ z6 m1 p7 p& ~
]
4 K0 i& P4 J3 ^: a, ^/ Oend
9 a; a, Q8 ?* p5 g) Vto regrow-grass2 `5 [2 m, q: B9 ^9 Q
ask patches [$ ~- e2 Z) w% f0 {
if random 100 < 3 [ set pcolor green ]3 ^/ c! z5 m5 R
] E9 K6 \4 ?$ a# I l
end
n3 U9 w7 L0 I9 p. \to do-plots
7 q. k4 b% Z4 F set-current-plot "Totals"
+ O+ y/ I/ L. d# A/ B- H set-current-plot-pen "turtles"
9 |. p0 g3 q7 J; o C j plot count turtles
) k9 C' B/ Y% T. d) m. r! l set-current-plot-pen "grass"! E! k$ D) e- B( B! u
plot count patches with [pcolor = green]
$ {) m% F8 [# v- r% Y3 M3 F7 [ v( fend
/ L! L- S4 u/ O9 i, v/ [: k1 d# w可是运行时提示no such plot: "Totals"
/ F# V$ v" V# W' |. Terror while observer running SET-CURRENT-PLOT
$ p; s1 T7 S0 I8 Q8 ~! P$ Q# V' U% g/ t called by procedure DO-PLOTS1 ?3 ^/ ^( D# J0 x6 |
called by procedure SETUP
- z" G8 R1 N" m called by 按钮 'setup'
$ W2 [9 }, c4 [求大神解答啊 |