我编的程序如下turtles-own [energy]
5 @. v* g8 a& D6 Qto setup$ ~. y0 P- W3 B5 z# f5 H7 Z
clear-all5 F- j0 r5 X* N8 {
setup-patches8 _, ]4 n+ g4 A' D
create-turtles 100
; L' O9 n; I0 M% U+ d5 | N2 ~- a do-plots2 j9 K" q a! q+ r
ask turtles [ setxy random-xcor random-ycor ]: n& N& t3 v8 w% G1 i
end
- w$ d. j. j; r: Kto go
7 t1 p$ D/ Y) B1 y move-turtles5 J! l h! u- v! X# W$ h, J$ d
eat-grass
0 g/ V6 q5 V. ~% m+ K reproduce: ~; l+ v* [4 I& N6 l
check-death
% D+ d3 d; j9 k# Y5 u9 i, z regrow-grass
0 y% w2 [# y& v' R: I6 i do-plots
; Z5 a8 n5 Q9 Q- T, ]; w$ J( @" wend
* w$ Z2 W, Z+ x* h6 @) ~+ Lto move-turtles
4 D6 g3 v9 ?- h% @0 y3 `4 k ask turtles [/ r& P- @, ?& \
right random 360
$ `) R9 Y& e3 q* f, }* h4 |! A forward 18 V$ D2 p8 m f7 h" A S
set energy energy - 1
, a" L/ k" L$ b% @8 U/ s7 U+ N ]& f# r5 ?# M& K3 g* N
end! B8 m2 ^9 S9 f; ]4 I
to setup-patches
8 R3 ^$ L7 [, a' N: P, M$ ` ask patches [ set pcolor green ]
$ s9 Y+ w2 ?* h0 x3 cend
) m$ ?$ W; p! w( E' Tto setup-turtles
& d" L4 H7 m) f5 U( c create-turtles 100
- |3 J2 q( B7 {9 I1 M6 a4 q ask turtles [ setxy random-xcor random-ycor ]
7 T" F* j% t# Iend
- Q4 I7 a6 j7 z8 [7 H* mto eat-grass) M" N; ]2 f1 R2 x( i# s
ask turtles [! H" B$ g4 T- _3 [/ K5 C) `
if pcolor = green [
2 w& j2 K& R$ T! g) I set pcolor black# T1 b, H7 L5 G. B/ i+ |* ?# f% N
set energy (energy + 10)
4 o+ A" g h8 q/ v ]9 M' J9 I/ P# ^' J
ifelse show-energy?
8 H, L4 H* G, E# L7 n& p6 ^2 @ [ set label energy ]
& V8 K: ?7 h: c6 I1 W* s. ^ [ set label "" ]
2 D6 [; k" O$ d! I7 I( E' ? ]. N% k% J9 P/ }# T- p
end
# i8 ?/ H6 ~# D4 z3 b& W) W& i+ |to reproduce& T9 h" l' M c
ask turtles [
4 j; w( i" G! {8 p# R$ f3 N. m if energy > 50 [, j, c2 M$ n! d) j9 Y/ o
set energy energy - 50
% y& T6 O+ l. D hatch 1 [ set energy 50 ]
$ i7 V7 ~# s& k a$ O: V ]
0 w# J6 w3 p: z5 J/ M ]0 @5 c; K# h/ U) ]
end( | S w W# N
to check-death) @6 A) R9 b4 o; X0 e' ~' ~* r
ask turtles [
% |3 h h# c% b) h* M( \8 Q( P if energy <= 0 [ die ]0 h M8 c5 V$ O% L% P. S. O
]9 E/ l; h" N& r) U$ ?9 ` T: P
end9 x& Y6 v* W; s4 r* o
to regrow-grass7 r N& L+ k1 e: [- {5 ]
ask patches [
+ u5 [2 [% R4 ]0 e if random 100 < 3 [ set pcolor green ]) }, S( o) \& D. O
]- U: K7 `2 s; @. `" h
end- `0 Q6 W- A. a4 U
to do-plots
; u; c: i4 b2 j3 `1 _) x1 q. _ set-current-plot "Totals"0 K3 o1 T& d' A& ^! p+ H" F
set-current-plot-pen "turtles"" b3 l5 w4 y8 D$ d N
plot count turtles0 j/ t( U" e9 Y3 [& P3 S
set-current-plot-pen "grass"( ]: d0 C/ S# f1 v* t" }
plot count patches with [pcolor = green]
4 g1 q! h4 T9 ]& j1 Rend6 d+ e1 V0 N! g& s3 C
可是运行时提示no such plot: "Totals"
0 f r% \% B8 `- i! C( o; x% L8 w. aerror while observer running SET-CURRENT-PLOT9 c4 Z6 b0 K8 N2 `2 j! _5 P4 u
called by procedure DO-PLOTS+ w z+ G+ c/ i5 M4 G' L4 q
called by procedure SETUP+ ?5 k( D, V/ V9 ^- M8 |- ?
called by 按钮 'setup'
, u6 n9 g6 V- H; O7 {求大神解答啊 |