我编的程序如下turtles-own [energy]
' t- T5 y; V! z1 V2 Ito setup5 n4 O. S w9 V# [: x, d
clear-all
) m# O1 ]8 Z( }, A setup-patches+ W( i- R( j1 {" I s8 n& [
create-turtles 1007 R( c9 c1 p' n$ g
do-plots
7 e0 N4 e) c P* I7 q0 j ask turtles [ setxy random-xcor random-ycor ]- a7 E6 k0 F& C$ D
end n/ |1 y# S+ I. Y( y
to go
+ C- s+ V- D- g1 K; I2 x: F4 d: B move-turtles3 U) M, }$ ]2 z( Y5 q7 l0 B$ Q9 T
eat-grass4 m0 a- d" ^6 I# ?' L+ W' w
reproduce8 L% l! q2 z+ K8 M5 R/ _
check-death
- m% C6 A. S9 l$ ^) L, t! V3 h regrow-grass
: N( Q/ I2 `. x, k6 }1 j5 _8 F$ Y& W do-plots( f' ?8 w8 P7 d1 q0 s
end- d$ T3 V( X0 @- _9 \6 X
to move-turtles
# {: v( ]9 h$ V ask turtles [( Q) w" f, O% V2 T
right random 360" t; l& _/ ?- i1 L, Z
forward 1
. G; N0 s L/ B set energy energy - 1
- X' B7 {6 i. @9 v: Z0 E: c ]
7 l: R3 H7 E; C" M- G" eend/ E% \: |% _2 e# L
to setup-patches
# X4 o% z9 R" n$ [& Z3 G ask patches [ set pcolor green ]# ?/ I s) Y2 d4 D1 w( d
end
: C' M+ `9 O& ?7 ~. Q6 B# ]5 F* vto setup-turtles$ h8 e2 n% T9 q/ O2 s0 x3 O% s
create-turtles 100
7 n$ y, u8 @% Q( \; L ask turtles [ setxy random-xcor random-ycor ], ~( M; a# A0 A' V% O3 Z) T
end
6 b, r! j' S1 s9 Eto eat-grass
* J, W. f( ?. z+ k* \5 I ask turtles [) |4 n, K. S- n% A4 v) j/ I
if pcolor = green [9 L E8 e4 Q/ x! S* s& c% M/ A* W
set pcolor black, P; F8 |* W& ^5 G# O
set energy (energy + 10)6 R% J' d7 K5 i: p G( h a
]
( l h0 W! i& b, O ifelse show-energy?, i1 d9 H0 s# [! F
[ set label energy ]
# _9 j, z* Q, H [ set label "" ]
3 t2 a6 X' O4 u2 A; n, Z ]
% q/ l$ j [, L3 `3 c; I1 Q; [2 o! e, ~( bend! V! u! d0 j* |$ Y) z
to reproduce$ ~- G# ^5 i) a9 \
ask turtles [
: g9 A9 o( m- @8 a& j: {' L if energy > 50 [
y3 L9 m6 O; u m+ s) _+ t set energy energy - 50
! F8 A; V% }$ F hatch 1 [ set energy 50 ]
9 J* |9 s! B( \# n ]! Y% O+ @) o+ ]
]
' O4 C( T4 K5 [5 X3 Aend
) R' D3 Y# g+ g6 @to check-death9 }) d y& \8 v/ Y# k$ c
ask turtles [
% _/ w/ @! B% X4 F if energy <= 0 [ die ]
- [( x! z6 |+ D J, Z ]1 e: b* }. a+ @: g& a4 C% _3 y
end/ n( ~# O; ^, `& J) @2 C" c
to regrow-grass
" d: i5 d- S+ s% P1 c9 }0 v ask patches [
2 U7 T- ~) z- I- e- F if random 100 < 3 [ set pcolor green ]
1 K8 @' Y- f/ M' w& ]" V9 t; x ]$ s% H& F! G5 K
end
, u6 V7 G: p) H" w4 e8 ^5 x2 tto do-plots4 {. W/ I: z; s( e1 f, c0 G; }
set-current-plot "Totals"
3 g6 Y$ n0 q _$ `0 x [6 h set-current-plot-pen "turtles"
/ G& d' [' ^/ B% x/ H/ \! _ plot count turtles. H% F0 v# `$ p( y6 V
set-current-plot-pen "grass"0 A7 @; x1 C- N& q
plot count patches with [pcolor = green]
* y5 P1 H3 O- Z9 C* ]) O! dend
4 X& [ a# c* P. ~% L$ B可是运行时提示no such plot: "Totals"+ N! ^4 h& t9 ^! Q7 L
error while observer running SET-CURRENT-PLOT& f2 J4 Z: m, o: ~3 V, H# `2 v
called by procedure DO-PLOTS
( n! G& u, u s; V ` called by procedure SETUP
$ L% A) L" ~# T* k" f called by 按钮 'setup'* P. F ~7 m2 y' e* s7 I
求大神解答啊 |