我编的程序如下turtles-own [energy]
6 @! {5 B& O1 H+ i0 d7 W' R- R) yto setup# H o" ^) ^# N/ s( o" |# N
clear-all
+ D/ h$ o2 X9 \ A setup-patches
; }! c* {* H" p! @5 e create-turtles 100
; j6 V. ?) {7 s0 T; y2 z$ } do-plots
: |# b" f& @* p ask turtles [ setxy random-xcor random-ycor ]3 N, q* Z' y1 H/ [
end
5 H; L" {! H4 e+ Z$ T( mto go% c& Q6 N) `- f
move-turtles$ [/ G7 f& o6 M W5 j
eat-grass' ~2 ?, u# _* r8 x+ g% P |' o
reproduce" {( H$ i1 Q/ e
check-death
& a6 d( F* j# g! \ regrow-grass
- Y; i0 A. o* h/ g* `# J, } do-plots( J$ C3 |5 e# [$ U* Q* q3 U0 T4 K
end D3 g9 u3 I* B2 t
to move-turtles$ {* c }+ L6 e# x% {1 J0 d7 A
ask turtles [1 c( _: l: o1 C* N P1 _+ Q2 c6 @/ {& d
right random 360
! s) V x4 Z0 l+ A forward 1
1 _! h+ r9 G/ X) u4 w" G& h v8 B set energy energy - 1
# ~: x) \' F& }6 Z ]0 R, L) e/ w- X. c
end
' l9 T* Q6 m/ m, u1 ^to setup-patches. `( r; [4 `5 U! N, c
ask patches [ set pcolor green ]
! T' O O# Y6 _8 d0 N8 S9 g. ~+ J& nend, g$ R/ i' i! ~$ ^6 v8 y
to setup-turtles
0 A$ {3 v! _1 u create-turtles 100
L2 _/ v0 v7 n/ a# b ask turtles [ setxy random-xcor random-ycor ]! s# Y Y" w% ?
end ]' {4 D! \# b F
to eat-grass2 g, @% q. _0 s# S
ask turtles [
/ z& {& Z0 r2 A6 [' s! P8 Q; \" b if pcolor = green [
# J8 ?# s0 T* t- K0 n/ P; M set pcolor black
% b) d$ Q( D7 y# N+ }. O) q* A set energy (energy + 10)
/ d0 `3 \0 Y1 h. y% ?( |) b ]! Q- b. g7 m. n+ t7 s. b
ifelse show-energy?
b6 R: ^2 Y# X9 D& F) L* ? [ set label energy ]' ~, G: S1 r% Q6 G. j
[ set label "" ]. t# o% p0 ?1 Y; B" v" ^6 i) L
]
4 i0 p$ Q$ _/ x' l; ~5 qend
3 z4 ?! O& h4 R8 Hto reproduce
8 L1 Y! f/ n" H) w2 v ask turtles [
8 [! \, M3 S2 m+ W if energy > 50 [
& x2 k* m5 s6 P1 C8 S2 T' U set energy energy - 50
3 Z/ `2 X2 i, g- k( U# f3 o hatch 1 [ set energy 50 ]( S7 T2 V4 |2 o
]" a) C! {" l0 K9 T6 n4 ^* X
]
* \, S7 ^& A4 M: S* E: ?end
+ _) Y0 H* V7 r, ?to check-death
5 {% B% g, r- {) { g4 g ask turtles [
3 ~( `' a, r2 b$ m! Y% U* f if energy <= 0 [ die ]9 E {. L! A. c! }
]* Y. p' `3 i6 h; ~6 |
end z8 b } ~: ~! N5 M
to regrow-grass( @& V& c0 T1 c
ask patches [1 k/ c0 V5 X7 C. z' @* P
if random 100 < 3 [ set pcolor green ]7 m K$ i2 Y% R* s, F
]/ H% }9 w6 \. o, Q w! Z
end, X+ f5 {9 P# s$ y" B5 S4 I ^/ A
to do-plots
Z4 E6 n3 E7 O8 e5 N% I set-current-plot "Totals"% k+ Y3 |: ]* P/ n- {: n% y, L
set-current-plot-pen "turtles"+ r. J. M3 F" U, X4 H
plot count turtles
4 K& F. f( c4 F- l set-current-plot-pen "grass": ^! K h$ E6 e0 ^1 @/ ^1 v; W
plot count patches with [pcolor = green]6 n. N. T1 a" u8 o* e
end& k; z! h. d, C3 b, q! B# F
可是运行时提示no such plot: "Totals"' M' B/ h$ N6 M/ D
error while observer running SET-CURRENT-PLOT4 }0 @! Q/ i3 j. V; ^/ @' n
called by procedure DO-PLOTS% h$ ?4 T6 m4 W9 g& z
called by procedure SETUP
; f0 a b: R+ J! _ called by 按钮 'setup'
' c4 a# q1 P) l" v! g4 [求大神解答啊 |