我编的程序如下turtles-own [energy]
" E) A' n2 g5 Y6 c4 \to setup; v; C' W% R4 ?3 o
clear-all' [' Z1 s: H5 b1 `& `' T! e
setup-patches4 X7 y' J3 t0 E1 S' `2 x9 x3 E, ]
create-turtles 100
3 n9 J7 F( X/ c( U+ s/ M do-plots9 F! ]! K- i4 H8 P9 o4 v4 _
ask turtles [ setxy random-xcor random-ycor ]
7 U$ s R' A: N Y# qend' `( S9 }; y0 e! ]% b6 F4 X5 l
to go
$ |( C! B p+ e move-turtles
6 w% j! F+ }$ e8 L t- a1 M eat-grass
, A! ~" N: {2 M- Q3 }/ _% P reproduce
- U8 x. b% A0 ?' W" A# s0 y p check-death6 g9 T1 g V1 E [5 ]. B& H
regrow-grass, S. a- p6 m& L) _) q4 `
do-plots( t+ v3 z* V# f V) H' U/ u- @3 Y
end2 }: I- |* N: C3 o
to move-turtles. T, {- V. ]0 }9 D d. Q4 X) I: C
ask turtles [
0 m5 n) N7 _. b3 i9 w9 y2 _ right random 360
5 L$ s7 t4 H' Z( J2 A forward 1: B* o7 Y. u7 E8 a1 {
set energy energy - 1; R- N/ g7 g n+ D* b' U6 c
]
7 Q4 h% D" d% O$ h |+ q9 `end! P& M+ _6 B# [7 _0 P& N
to setup-patches
' o3 R: h" N0 Y ask patches [ set pcolor green ]7 D2 M5 C1 C* I" `0 I8 _
end
$ Q" V# Q. P3 Z6 Qto setup-turtles
$ \8 m1 A8 f8 A create-turtles 1008 K8 K8 t$ \$ _: K# q3 u1 w7 d0 E
ask turtles [ setxy random-xcor random-ycor ]3 M0 m! z/ B3 h8 S' v* K# j
end
& Y: S; ~3 X: M+ b# s2 Gto eat-grass; c! K0 [3 I0 `6 d6 c
ask turtles [1 A; l. S" P/ D& B; J* C4 l
if pcolor = green [% H( z& v8 U6 z! `
set pcolor black0 o0 ^' p4 n& B w
set energy (energy + 10)# z7 R7 x: [ f$ `
]
' z. N/ ?" ?. V6 g. m ifelse show-energy?
, Q: x* W$ n1 G n5 { [ set label energy ], F/ j2 s4 v1 v, d2 {
[ set label "" ]
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end
% G- l% j. s% o+ v, Yto reproduce* K/ k8 x* n8 ?7 U
ask turtles [* B h, R- J" g
if energy > 50 [
/ _5 ?: V' a7 P% e: M, ? set energy energy - 50
# \5 ]. l2 j4 C- n hatch 1 [ set energy 50 ]* ?/ N# u; X1 `& V) @) R
]* h! i* H7 G/ T6 U, Q2 w0 |6 r
]3 ?3 h }0 G8 z+ U0 z8 u1 n
end/ @( C2 s( K4 @' m% R$ v
to check-death
, O. X9 z9 A7 V# x0 W1 | ask turtles [
" D9 u U- O$ Z5 E" l if energy <= 0 [ die ]: ~/ \6 c2 [) G8 H
]0 U) u1 j/ `+ M# V
end
" G% z9 y$ @) v0 P9 k; r0 q" oto regrow-grass- V" p% z* G# v* k ?9 Y) `# j0 s8 L
ask patches [: O% L6 Y7 u" e) `& w
if random 100 < 3 [ set pcolor green ]
4 p4 e$ Y6 E! u5 m ]: ?, X0 W Z6 D0 D8 L* a2 K5 D* g$ t
end. @( ]/ [* v$ D. k: t t' ^ Z6 e4 i
to do-plots- T: ?: D* z6 C' y" W5 Q# e6 I4 f2 x& h1 U
set-current-plot "Totals"
' }0 o# q) A, h* x4 H; B1 [ set-current-plot-pen "turtles"
( J- w6 G' x2 i$ Z# ]9 {4 N plot count turtles
! a4 Q) Q& m b+ L" J7 G set-current-plot-pen "grass"9 w* [! I h, T! o7 O1 D
plot count patches with [pcolor = green]: h9 z) o& X( f( y
end
4 |, b# ]5 b: h# Y+ A8 G8 g3 q1 w: L可是运行时提示no such plot: "Totals": ]! N6 F( t2 I5 r
error while observer running SET-CURRENT-PLOT7 N+ t2 t f% h# z4 K6 s
called by procedure DO-PLOTS9 v1 K3 p5 B+ D! a8 X; m' Y) u& D
called by procedure SETUP$ D Y% x- {4 } @5 r1 c1 N
called by 按钮 'setup'
; X+ t- c: B1 d0 C* w+ ~4 ^; o求大神解答啊 |