我编的程序如下turtles-own [energy]" e! j" V3 b3 ^- {
to setup4 K% G" g$ V8 Q
clear-all5 j+ W8 n; K2 A7 ~
setup-patches* j& _% k5 x9 t- V, T4 d) [
create-turtles 100
5 n, J0 V1 Y2 ^# w, o do-plots* H0 [% ?) U5 }% l/ ]) Z
ask turtles [ setxy random-xcor random-ycor ]
6 f) @! \, y7 |5 W; J1 nend
8 v7 D4 y9 I F/ d; F1 Y) c# {3 M5 Mto go
3 Z0 S, T% t/ d( N; v move-turtles
5 ]5 F5 [8 c$ j' v0 i6 C eat-grass
3 h' M7 h" i1 ?/ {1 t) J" `3 F9 Y/ b* h reproduce: m M$ Q2 A( E8 A! x1 c; i
check-death
6 h$ s f5 Y: F/ B regrow-grass
2 d1 d: ]5 h; i* L( |) B8 S do-plots; I9 \. Y7 g5 {; l4 j
end
+ F4 g3 x; \6 {- j0 w( v/ Zto move-turtles
2 G" s8 T, r6 E ask turtles [
3 z: ]2 |/ {, u right random 360
8 L. i% \9 F6 ~9 s2 E forward 1" a7 t; C5 L0 m4 ?' r/ T
set energy energy - 19 \. V! J8 C$ D& Q- Y! J5 D
]" d+ F0 X3 g3 ?( u/ N1 x
end3 ^! t2 l8 Y8 {3 K
to setup-patches: C9 [* P" m0 `* s* v5 s# o+ x
ask patches [ set pcolor green ]9 E& t3 c9 \) b0 e- y" G, E3 b0 Q
end
1 ?/ q% U% N5 g4 n Q' ]9 _to setup-turtles
i) O0 c$ ]+ V" r/ W create-turtles 100
. ` g$ o/ n1 P ask turtles [ setxy random-xcor random-ycor ]
6 ]2 E& w6 Y6 W4 p4 w7 Bend
" g+ r& ~) R/ G5 W) \* A- fto eat-grass
1 S) r$ O: n! f% l3 T ask turtles [
2 n- s* a3 ~" g! g if pcolor = green [
* _3 X' r; i' c set pcolor black
" ~: {6 w( [5 c! f% g' l4 q# J) d set energy (energy + 10)# m e( p# Y7 g8 F: H8 l
]1 A9 P7 P: J: Z, s
ifelse show-energy? f0 e! w! w8 [- h
[ set label energy ]
$ A" N0 |8 v( f9 A [ set label "" ]
3 \- D9 B! M1 i3 h+ Y ]: \/ P) F& {8 ^3 h% Z
end
* Y W, M9 _! M; l& Qto reproduce
, z& j) ~: f6 K+ |$ o; O ask turtles [0 H0 e2 o6 R s1 M' E
if energy > 50 [
2 d4 }1 q- k8 j! N6 A/ ^" r set energy energy - 50
$ L: g8 q9 |/ B$ F hatch 1 [ set energy 50 ]4 ?" B& X' O( ]7 q( \2 G5 m( J
]
% N- t4 |2 w, t" l; W ]% \% S! M6 ?/ m4 g
end6 b8 ^2 {5 H* n# b( P5 p7 t
to check-death2 {( _0 u0 C: a* J# I" T
ask turtles [$ s2 s1 t; M' _- @
if energy <= 0 [ die ] O% X1 s: }! }0 O
]8 G' d: q1 y+ Z, E7 E0 k7 M! t
end, f' e( K2 N6 j2 Q5 H- f. v" I# Y* h
to regrow-grass: T1 T# P* H$ A- I+ I7 c7 K1 d
ask patches [) k" }, w. R" _
if random 100 < 3 [ set pcolor green ]* Z( [: Z) h, q! w8 E; c
]2 x9 q F/ V9 a5 x0 |9 j& T
end; @4 R' {% T% b( T, Z! `
to do-plots) I& s2 O3 {; D/ R# R& j: m* Q
set-current-plot "Totals"$ {/ G/ X' Q5 \% C1 p3 ]
set-current-plot-pen "turtles"& C0 H- [, Z7 Q& o9 z# a
plot count turtles
2 W& m: g t5 }% S/ r set-current-plot-pen "grass"! k9 c1 S; D8 c4 B4 W8 ?
plot count patches with [pcolor = green]6 P. F' R# d H u: A7 p5 l" Y) c
end
5 f- l L0 q) i8 h. Y. T/ X6 d可是运行时提示no such plot: "Totals"
! ~& r2 D* |2 s: _8 D3 q+ T& Merror while observer running SET-CURRENT-PLOT
6 o3 T' ]! }6 R, P3 {3 Q6 d% B called by procedure DO-PLOTS& s% ?5 ~0 z9 y! B) i
called by procedure SETUP
! ^. N* M( i* Q4 o3 p called by 按钮 'setup'
_! r, I1 G3 G5 H G' c求大神解答啊 |