我编的程序如下turtles-own [energy]
) }# ~$ X, P7 S/ ~to setup
2 s0 }, w0 B4 {7 t( L3 I1 c. Q clear-all$ j9 A6 X7 K: M
setup-patches
( B, I- L( y; m( D. T create-turtles 100
3 F# N; `$ y$ T& j4 Y6 r' N do-plots
1 N" E F2 v& I# U5 T# c. N% K ask turtles [ setxy random-xcor random-ycor ]
1 M; O3 T0 w- r) Eend
0 O6 r i# _; u2 f6 i6 J# Dto go
3 J! k5 W x4 P! ?2 {, R" k move-turtles* @1 b4 C) G. H
eat-grass5 u5 m+ c. ]0 i; X& ~6 B
reproduce
6 ], ]8 f$ X* D# s- s. Q1 M check-death- a/ r7 B, T" F7 B" l) c6 d
regrow-grass- ^/ y8 v5 y: v
do-plots4 r0 X& L+ r- ]5 N! [+ E+ x
end6 ?0 a, v7 H5 q [
to move-turtles
7 E' p) O1 L/ G9 o, O ask turtles [
! |2 I9 s n7 j+ ]$ H right random 360
9 m2 l0 ~8 _1 B) r forward 1
# @ ]; t4 H9 @& m; _ set energy energy - 1
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end2 k5 E% r. f( A$ [. Z, v$ K
to setup-patches
X" V* o3 Q# e0 j ask patches [ set pcolor green ]
9 ]( G- _ z7 Z- F& T1 u! \end% @. F+ M& ~( U. h1 N- A
to setup-turtles
# L( q R5 o3 ]- ]$ ]* M( E9 n# a create-turtles 100" `; w$ z+ @4 x _% i9 z
ask turtles [ setxy random-xcor random-ycor ]
8 {" v7 Q& v* Q: c+ V) H7 n& pend# F% i6 c) {$ B
to eat-grass4 w. ~& `/ n$ K9 M' d2 `
ask turtles [* V6 @# x5 R: G4 y# u$ Y
if pcolor = green [4 e S c8 `7 I+ X7 U! }; p, }# K* t5 n
set pcolor black
4 s* b' a4 y6 C7 z set energy (energy + 10)
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5 i' b' P- \2 O# s" k' \ ifelse show-energy?- `8 K8 Z. U4 {' V. Y
[ set label energy ]0 U9 Y- t: o1 l8 l
[ set label "" ]
6 v+ J0 b0 f1 L8 N' R ]
/ _4 q% \8 S* Y' y ~5 t+ }end$ b$ R. n* q3 U2 H
to reproduce% ]! p. b$ h2 Q
ask turtles [0 f5 O: Q. V1 l" T: V
if energy > 50 [
% }8 ]7 E& ~; u2 `* q. H6 t$ L set energy energy - 50
# p4 l8 M, N: }' K$ q; v/ Q hatch 1 [ set energy 50 ]
3 T! P) @& d1 ?! ]9 c ]
$ f' V: S1 p! ^: n1 c) b+ R& B& c ]% b' I2 n4 Q% n' p# p
end" Z9 m0 `6 ~" [
to check-death6 |$ H; y7 C# z6 `
ask turtles [5 e) H% `+ i' I z8 d4 Y' u
if energy <= 0 [ die ]% S: M$ V# r/ s, x5 e
] U$ ?8 a+ ?' p) J! u
end* \+ G, g s! k- l+ T5 g$ w, R
to regrow-grass! X, @1 r. J! ]4 a
ask patches [- x$ I4 @3 W' z) ^3 X V( c& e
if random 100 < 3 [ set pcolor green ]
2 C! S: x' } l% p1 j+ T0 t* } ]
# \2 [! @% V! V1 D4 g1 a" kend: m5 P7 z4 j! H7 e& e9 a
to do-plots
- _; `# k, L' X set-current-plot "Totals"6 n/ A6 B0 n& Y, w
set-current-plot-pen "turtles"
9 J7 Z) h* H( M7 S* z: C plot count turtles) A) X! H& j9 S. ?
set-current-plot-pen "grass", ^/ Z4 [- Q: `& R: Y5 x
plot count patches with [pcolor = green]5 z6 E- s* e+ J( k. Q" J
end a0 e7 ]- Z" |# U- X& j( b
可是运行时提示no such plot: "Totals"$ b' H6 V/ L+ Y1 j7 V
error while observer running SET-CURRENT-PLOT. b9 [0 p/ k+ C- ^
called by procedure DO-PLOTS; q5 j9 Z3 Z' s' q
called by procedure SETUP8 `; z+ N: ~# y$ \
called by 按钮 'setup'# j; N" C+ a' l0 g% S
求大神解答啊 |