我编的程序如下turtles-own [energy]4 R( M. i/ B3 X& O9 r, {
to setup: Y+ N% t0 e' e- p0 b9 Q
clear-all
" t1 C! C6 {4 C6 f- H: P setup-patches
# }. z2 @2 Q7 R' }' } create-turtles 100
' ~9 m& p2 o; I+ G, {% W g" o do-plots
* H, W# u* ?9 A- g ask turtles [ setxy random-xcor random-ycor ]
/ w& r- y; J# l( ~" jend
7 v9 |4 u0 W$ ?* r6 |to go' R- _5 F8 b9 F5 U3 [
move-turtles
$ c6 l$ I% V* i# T eat-grass
. g: C. a$ g+ m2 \ reproduce
/ Z, p2 M* j p3 k" x' R4 w check-death
8 Z* R- f8 C4 z% Q regrow-grass
% T' P8 Z5 W; ^* ~ do-plots
6 A0 [) F/ z9 r5 Qend
/ D% p9 c+ i+ B4 b1 vto move-turtles
; B, K9 g' p, ?) t4 _ ask turtles [( V3 t1 e9 i2 b$ Q- L4 H
right random 360
6 i, u( H# |' y8 N forward 1* r) S$ {' e' n5 ^
set energy energy - 1- k: y: ]8 v3 N/ }
]
% J# k& x7 X6 r D1 \end/ c8 K# ]; Y- v4 h% d# U
to setup-patches
7 z3 z7 j6 D+ ^* U; j2 T ask patches [ set pcolor green ]: t8 d1 x0 @9 s W
end. K' D: }) w" V7 m; `! R- D8 x5 a; q
to setup-turtles
- S. y& \0 i; S3 O2 E/ ^ create-turtles 100
. O, j6 y! |2 a) \1 n7 g! D ask turtles [ setxy random-xcor random-ycor ]
4 g. p- {- B6 |6 ^( j( ?end
3 i! c4 o% [: s" L7 xto eat-grass
3 E' `: k& {9 t$ ~7 Q6 I! e ask turtles [2 Q% n. W$ j) y9 M: G5 l
if pcolor = green [1 p$ l% y2 e' R# R u" ^% {
set pcolor black
3 u3 Y9 i0 Y5 d* d7 K set energy (energy + 10), U- ?! m. f. Z7 c& X3 U' [" ]: k: Y
]
6 r$ w* H% H: v+ { ifelse show-energy?% b2 T& |7 E- C& ], E
[ set label energy ]
0 X. X( B G" c( l3 I' t/ D [ set label "" ]
. I* v3 J3 a2 s) K ]: _* N8 b7 {# H
end+ z# N) y2 E# M8 v9 \) J8 h: v
to reproduce
6 e; e1 ~$ W `+ ?! R" ^* @8 N ask turtles [
$ x0 X) J; c7 x4 p4 j' I; ^( K" j if energy > 50 [
# V, [7 E5 z3 I) T5 n5 ^ set energy energy - 50
1 _! R" D6 q! X9 y0 k$ e4 i hatch 1 [ set energy 50 ]6 D! |! h% X( W, n5 s
]
( \/ M$ P3 t7 `" a, a ]
6 o4 t% Y& X6 b$ [: n2 O! Vend" w3 j# {; @' v
to check-death
' K* M6 B- }; V! `) L2 _: x4 F ask turtles [
! W' Z' O# S4 K4 X if energy <= 0 [ die ]
* h3 k' N( i, H k; N* v7 ]. C' ^+ L ]
6 I0 t+ B6 @2 D( Z' E$ Zend
9 Q. `6 l% g Ato regrow-grass
6 J. I: z& ^9 E5 t9 j0 i ask patches [
5 z+ I4 A: X# {- q) ] if random 100 < 3 [ set pcolor green ]
f! ]+ Y% t* \ ]/ T4 V8 x s0 ~/ U7 n3 N
end
& t) ?0 Y6 w; |0 Hto do-plots
. v% [- E% P7 O, D+ K set-current-plot "Totals"" H7 q( E7 [) ?* e* R/ Z* T' o
set-current-plot-pen "turtles"
, Z0 ^ u9 H' I+ G# J plot count turtles
/ \- I) P( H- i5 t8 ]% s% f( z* W) L1 K set-current-plot-pen "grass" e0 S: N2 g. i. g
plot count patches with [pcolor = green]
) u, \, b4 h, u, D0 e+ Pend
: {4 E7 t4 a* M; N1 X可是运行时提示no such plot: "Totals"
5 Y" p. J- R1 e) y) m$ C. eerror while observer running SET-CURRENT-PLOT' X4 ~: p8 w. w6 [+ ]
called by procedure DO-PLOTS+ U. f& T" ]" Y: {. N; V& S
called by procedure SETUP. A a8 f# s* |
called by 按钮 'setup'' U; B" V8 k8 x" g2 v- \) ]1 \/ f9 f
求大神解答啊 |