我编的程序如下turtles-own [energy]( H7 r5 F* m0 b. c+ N! [0 F
to setup0 K& U) L! Q; f2 h3 d8 B
clear-all& z) N- L3 a* }( V0 D
setup-patches: U- I/ \. l3 C. o
create-turtles 100
. z2 {2 m- [! q! u do-plots
3 y, c0 l* l, W2 c ask turtles [ setxy random-xcor random-ycor ]! {5 L- k' g3 \( h8 a
end
) J7 Z% U" k* a) ?0 ]1 I6 B, Eto go. j1 v2 O q0 t9 @0 t" t
move-turtles
; s9 o8 e" h) h+ `% x eat-grass1 v& N8 K9 L& Z
reproduce, k& p5 s- V8 I1 [9 `8 S
check-death
$ M1 f5 E" M A6 e) N regrow-grass5 B Q0 r8 c% ? I5 N
do-plots' c8 E# Z; q8 i8 X7 R
end
, f; w* ?6 j h& t: B6 @5 _to move-turtles
7 b# v5 J: F) F! S1 b ask turtles [
- f4 S4 C. x4 P* Y right random 360
) {! B' H" d. `, R- | forward 1
) Q$ ^# r" l( r: c6 k0 @, n; i set energy energy - 1
* W# D- G7 s8 `- b: H6 e& q5 ] ]
2 D7 \2 i- H$ {8 H4 v0 ^4 ]end/ F; v3 h8 a4 x5 w
to setup-patches0 J6 @# m" f( ^# c! k, L6 p6 \/ ]
ask patches [ set pcolor green ]6 |6 J* G9 b( F. R
end# s( V3 `2 ^7 c1 }+ J% [3 @( A
to setup-turtles
- K! i) j7 B6 V1 b create-turtles 100
0 o3 a2 X$ z& f5 ^# F ~- E1 } U ask turtles [ setxy random-xcor random-ycor ]$ K" F5 i% o4 C! e; B+ v b1 r
end% y( h% x" R+ ~0 p8 G0 X
to eat-grass1 Q# ?" l2 ]7 y7 N [8 h
ask turtles [" X0 J0 E( ]4 i: K" v* p* |
if pcolor = green [- ?! ?& P% C" v! z# W
set pcolor black
( o" i- V) `# x% d set energy (energy + 10)2 x! ~* [. |; K: N2 m& b+ O/ t& K
]: e% |: J2 O+ I% A. N( H+ @1 L
ifelse show-energy?5 V# ?8 r _$ c8 z2 L5 X! S
[ set label energy ]
/ O& L5 C8 D5 I [ set label "" ], W* n5 W7 D ]$ r/ X( G; c1 z
]
5 F+ \+ E" N* G5 V# v g( Tend; K/ X9 s' Y: | w- E8 r& Z+ R
to reproduce
! \/ o4 |# \* p/ t Q, M$ e0 b- T ask turtles [/ |* l% h+ m0 `* D' b: M+ D
if energy > 50 [" j4 U8 A; ~+ q- U' o( ?
set energy energy - 509 O2 H% T4 P( i& d! L; y
hatch 1 [ set energy 50 ]# X: k5 S9 i# z) ^
]' T$ i* g6 t- @. o' y9 }7 n+ V
]" G- o9 ]$ p6 x7 J
end
/ c7 g Q$ `( Y4 m U" N5 L3 Nto check-death3 @* @' i/ a! w5 J
ask turtles [
+ c' }8 e" G* U+ F8 ` if energy <= 0 [ die ]
7 u+ c& y2 y' P+ r; [% o ]+ K# P! h ^2 _' K/ n! w$ r
end# r0 m2 s5 M7 t
to regrow-grass2 e+ F+ D/ y0 i0 o
ask patches [
. X/ `- V2 J d2 Y if random 100 < 3 [ set pcolor green ]
* i( I! N, Y& U4 O; T z ]. I3 G3 V0 L3 \) D
end* \" {( |* R! k
to do-plots5 H1 U& d0 B, Y5 G# l
set-current-plot "Totals"3 y. }) I4 @9 ~. z& g# M% n% }4 C
set-current-plot-pen "turtles"+ u8 b2 o! g$ j8 M# ?+ d
plot count turtles- l7 J7 }3 @: m
set-current-plot-pen "grass"( _' f2 w" }3 V6 U8 w
plot count patches with [pcolor = green]
9 b' ?' Y/ f* ?( W( vend8 P9 ^- V% ]: {3 k! _6 S% _; S
可是运行时提示no such plot: "Totals"& [. ]3 T3 o1 X
error while observer running SET-CURRENT-PLOT
/ p4 B0 Z, L" P4 x6 o$ N called by procedure DO-PLOTS
; r# C( d! z+ \$ N9 C" M called by procedure SETUP
) S; ]( j+ k# ~8 \3 q. H# v called by 按钮 'setup'
6 i2 H4 E# D5 H$ q求大神解答啊 |