我编的程序如下turtles-own [energy]0 G" k0 Y. I- V; I* S# B
to setup
3 l" P( F( y2 D7 Z0 R* Z2 m1 u6 v clear-all4 g- u* `) w7 Z8 P6 v
setup-patches
% H& u. W0 w8 v' J* _2 P create-turtles 100
" t9 l4 t* y$ D& M1 `& M do-plots
+ _7 d @' z) V1 W; k6 X ask turtles [ setxy random-xcor random-ycor ]3 ~9 T9 X2 H0 d* n: l9 ]9 p
end7 V2 S9 E. D0 N
to go
8 g2 e+ U- A, K' d move-turtles
: `' R1 m y/ r+ v- @3 M eat-grass8 ^8 X2 b/ w1 Q" D
reproduce
6 S, e! \6 ^+ f' P check-death( e3 y4 @, O: o; T/ D" X" g
regrow-grass2 J# Y# Z6 g+ I2 A6 W5 g/ d1 C
do-plots
6 B I, [" z( qend
' v" E f' A/ q/ `+ r+ u! xto move-turtles+ ]( e n5 c/ T' ]" g
ask turtles [7 g1 e- [: [4 w" W8 ?' V
right random 360( d# |7 H9 Z1 C& S
forward 1# r2 {# a# q0 h+ l4 U4 D& P
set energy energy - 1
F! |/ s( c/ F4 d) D1 v7 o5 W ]8 E# _0 y& m. d7 A) c+ @
end5 I* f% x9 Q! [
to setup-patches
; k, y# w, F& S ask patches [ set pcolor green ]
" I' g( L0 ?+ d7 g9 C4 Q( Nend' @9 X- R' d0 {* r
to setup-turtles
. }, u7 Z* _: I- Z create-turtles 100
+ E+ p9 k" [7 J4 h7 |, x* g4 } ask turtles [ setxy random-xcor random-ycor ]
2 }2 O& V/ z0 H. R! z3 Kend
0 \* \8 j& K$ m( l* r. D/ O0 Ito eat-grass
: h- J9 \# t( I: }, _5 ~2 ` ask turtles [
6 `$ N# k2 j, X# Y$ i& m) H; [ if pcolor = green [
! H8 T7 E& E \* i4 S" y set pcolor black5 p& D5 c7 m$ D* Z: f; B
set energy (energy + 10)% }* P; `% O( X9 X% ~/ L
]# v2 I& F# }! w; v5 g
ifelse show-energy?% ~, y4 l( l4 f8 ]" P$ }9 z* o
[ set label energy ]6 @; J; `( Q# m3 M* X) N
[ set label "" ]
( _9 L, L1 D7 I+ T, Q ]
1 {' z8 V4 m' v: R2 Q, Z, E# A; Aend" N8 }4 ~- \4 y5 R: h
to reproduce
( Q: \8 ^" a% W& ?& Z ask turtles [
1 ]. u! ~- }+ p7 w) k" Q if energy > 50 [* T; ?2 Q- J( W0 ?4 w
set energy energy - 50" E, z! j Q3 q( n& c
hatch 1 [ set energy 50 ]# \0 e6 A7 g3 {* `$ \0 [
]
! c S, @% x5 u ]
( i/ T7 }, v2 _: X9 Oend
* T9 v- X) {! Y1 bto check-death
, \5 w& L# C# a8 ] ask turtles [( N$ t, |: t2 ^$ l
if energy <= 0 [ die ]
9 e O- a- i1 m* {: N" _ ]
( ~( B, n* }. x, |$ R) Eend/ O* S+ f; ~! o7 F3 a% L
to regrow-grass2 m# ~4 s6 N* L) `& T3 C
ask patches [
/ ` i- i& T7 n' w9 A C if random 100 < 3 [ set pcolor green ]
/ Y8 g5 G+ c' M* O# S+ L ]; ^" r$ r- I9 I" `1 C' b. L
end
$ z/ {- k! W5 }- |: b9 Z7 ]) Nto do-plots1 G8 J1 C, h+ F7 W! o) a& N+ }7 r
set-current-plot "Totals"/ d) Y r1 `! N j, Q
set-current-plot-pen "turtles" G* F4 ?/ V! K8 U
plot count turtles6 |0 Y9 H" U0 Z7 e: ?, v3 a1 X, S
set-current-plot-pen "grass"
9 H: w" E) H/ q! f* A0 G- d. U6 P plot count patches with [pcolor = green] t3 i# a! s9 g N* C7 V# L0 k
end
$ ?- x" j0 \0 j4 y2 e8 ]& `+ U可是运行时提示no such plot: "Totals"
0 i7 t% n- P+ Terror while observer running SET-CURRENT-PLOT
9 |4 I6 Q6 M, W( g4 t called by procedure DO-PLOTS
' x6 Z1 R/ n( U2 P0 p8 T* P called by procedure SETUP9 M2 a" l5 S$ b' o$ E6 ^
called by 按钮 'setup'/ K* M, g- [5 U; e" W# e
求大神解答啊 |