我编的程序如下turtles-own [energy]* B/ G. |1 J/ G- m( e% z6 w5 g* Q
to setup
& k2 Z) K9 |9 j clear-all
5 Z2 _! y6 w0 J: n setup-patches7 T- B* \1 |/ L& v
create-turtles 100& r4 b, G" Y0 J9 d
do-plots, W3 \7 g' c2 [7 ]& a
ask turtles [ setxy random-xcor random-ycor ]7 A* V" `' G, d7 ?
end; t: K9 y7 I1 u* X! x/ T* X! O. i
to go
: [, `8 X' Y& P* g4 h move-turtles7 Y2 ]9 \0 g& _0 A
eat-grass) L2 }* u# ^' H4 E6 U3 n
reproduce4 k5 w1 M G& Z# ~
check-death
1 G: g* P' n( p/ C ? regrow-grass
* q! {. K# @$ _, Z* N: O: E) X5 i, E do-plots
) P1 b2 D5 {3 O$ m. zend
. g+ y" w1 f" H+ q, ]: _) B7 Uto move-turtles9 H$ u6 X# Z) a& s
ask turtles [
: d1 Q2 H: E9 x( i right random 360
+ q, ] I [# q forward 1+ A7 i9 A4 P5 |# O" G* d
set energy energy - 1
% Q& u$ x$ z4 n1 v$ W ]
) q3 M4 R: P( X0 R4 [5 {7 bend2 q8 J. _3 h3 L8 h
to setup-patches( f! R0 a) p# n; J8 i7 E: o/ o! [
ask patches [ set pcolor green ]* f4 v& a" y6 M3 P7 `( Y7 D
end
5 X! x0 J% O5 ]) C8 ~to setup-turtles
( ~' R0 e+ V" e/ Q! L5 F" _+ q create-turtles 100
* M+ P+ m" y: ^0 s ask turtles [ setxy random-xcor random-ycor ]
! A1 }4 G! B4 Yend
* B) y% m7 M% ]. F3 L% dto eat-grass) b) l' M2 Y0 |& P7 J! T
ask turtles [# e- }9 O+ _& ^: X2 ?
if pcolor = green [' R2 y" a( d5 o$ E. c
set pcolor black
6 K3 W( Z8 N" E5 G+ Q, } set energy (energy + 10)! ?& B! r9 D4 V% R9 j
]/ ]- Q% O9 W' H
ifelse show-energy?/ n3 a7 e- {$ J( S& C/ ^
[ set label energy ]
9 u- n; w- Q; q$ H: l [ set label "" ]% G/ x& f- p) }4 ?( K" a, k' k4 Z
]
$ X1 q8 h& e, g( z6 d# vend' F# u, q0 r( e& z' O% O+ P$ c1 q- U
to reproduce+ L$ r3 i9 j6 l; e' M
ask turtles [
/ b" w+ f, L1 j" H0 M+ q; X if energy > 50 [
" |, Q0 c2 N, [1 p. T; S set energy energy - 50$ o- a4 m) b; k9 L0 w4 p
hatch 1 [ set energy 50 ]- `1 S6 n+ r7 ~4 x
]/ a! C( j" `- ?3 G
]
0 S4 S- `+ v3 K( @( K) V. o; Iend
& g# K% {( h$ Q) G" P# u- t6 tto check-death
) f9 R. M8 E: d. D; q ask turtles [ l- m* I8 r* S
if energy <= 0 [ die ]
; O( v9 F9 I; V1 \( f: ?% o$ p ]
- H( ?9 L9 d7 E) O& [9 pend: B$ r# y$ Q) j# I3 ?: f; v8 y3 P
to regrow-grass! _/ F6 j& a6 @$ G! R X
ask patches [
7 o3 L* d, c( r* {# X0 W% d/ M& v( M if random 100 < 3 [ set pcolor green ]
3 C! V' F: ]% d7 ? ]' z* I2 D0 x/ G9 i, e2 l
end
5 j+ F K9 w8 Wto do-plots
0 j+ K2 v) _, g5 g, Y set-current-plot "Totals"
! a/ F5 O: S5 s7 Z4 n; O* F* {% O set-current-plot-pen "turtles"+ e3 V# f4 `5 J+ ^4 @- L# d
plot count turtles1 k/ Z/ @- [5 ~& I3 f' f
set-current-plot-pen "grass"
9 k Y4 S, n8 `* ` S5 ]" } plot count patches with [pcolor = green]. |. K$ _" q/ _
end+ x! M: N0 n6 J5 Z4 a% w% X6 t! A4 _
可是运行时提示no such plot: "Totals"
8 m: A/ S" i3 G8 Q" k" eerror while observer running SET-CURRENT-PLOT0 b+ h1 h3 m1 i& i6 v
called by procedure DO-PLOTS6 B2 M- G3 L: s6 D2 p
called by procedure SETUP1 s& c6 \8 X# F0 d9 O
called by 按钮 'setup'$ q4 F% W/ s p
求大神解答啊 |