我编的程序如下turtles-own [energy]& O5 @5 |5 j/ k/ f% F
to setup, p W! W9 I+ R
clear-all
, Z" e u) P, Z setup-patches
, u0 T7 O1 L* t create-turtles 100/ T) G8 c. ^' g0 @3 S+ R
do-plots$ k! X/ I# h( _- }6 q4 g" U
ask turtles [ setxy random-xcor random-ycor ]
$ H% ]3 U3 W# k- t; _end
. ]1 D3 r* B* d5 x I, Bto go
; M8 G# k6 k8 d1 B& d move-turtles9 S9 }3 M6 C. v Q/ b$ O
eat-grass8 x: D8 H% a( \; B9 c$ ^0 X; B. Z
reproduce) j2 f4 V! u4 m* F5 k
check-death
6 d8 y/ i$ x$ R7 b# c' `( q" y regrow-grass% z' M c0 ~# n9 A+ ^
do-plots( @. N) {% _5 |3 F" e+ y/ x$ V! t
end
# I E e7 Z1 J& |" g4 [, ]to move-turtles
G3 M! G; N; y/ w6 X R5 W ask turtles [" ^1 b! E: u" x5 S4 p% F) k0 [4 W
right random 360% R! l) \% c9 e9 L8 N3 _2 T8 Q7 U
forward 1
+ p* |; F- h2 T+ B set energy energy - 1* u: D+ _+ l; Z2 b" U$ w
]
. m; e) i6 {$ Q8 Y" S/ S" z: | Vend
; F! d. j- G w, I/ c4 S P* l% |to setup-patches
7 D. W3 k# Q* K" m8 K, ]2 h ask patches [ set pcolor green ]
4 E9 E2 g7 k6 b4 K fend
& z$ j9 N7 X; U2 P1 S* \to setup-turtles
& X3 T6 E0 Z7 j s* m. j: \ create-turtles 1007 E7 }1 b) B* }) J# ^+ I) k, C
ask turtles [ setxy random-xcor random-ycor ]$ ?9 v3 W. L* V# p* J8 s# n
end
; B: x& C" x. tto eat-grass
! `7 r3 S4 Q! i8 Q" M ask turtles [
: j4 k6 H/ Q; n/ i9 D if pcolor = green [9 w ^& d2 p$ M9 |3 Q, _
set pcolor black* ^2 r& F2 A" {! s
set energy (energy + 10)1 K- }* }. a$ s: r# v/ e- H
]0 s3 [0 { M* n
ifelse show-energy?
) A. M2 r. J& ? [ set label energy ]! P C1 o) ^2 |5 Z R' _9 j4 \* J+ v
[ set label "" ]
) O- A( t9 [. n2 A o( ?6 V ]$ S7 z# r+ g) S- O) V. T
end
6 F9 ?. F& K9 k) a5 v' xto reproduce3 R, p! a9 Y5 V" u
ask turtles [! e; N% n6 G) Y5 k. V& r
if energy > 50 [
5 J1 \) s6 N3 k/ ` N4 s" [ set energy energy - 50
! r h- a" ]$ k4 t f0 C3 ]- ^! C e" V3 A hatch 1 [ set energy 50 ]
, ~9 E/ f7 E0 k+ r ]4 g; I: ]4 Z5 K+ a' Q5 v
]
. i }; ^ w9 i0 l yend) X: K) v; J+ H9 j) ?# {
to check-death
0 G4 ~- v, C0 m0 \. S; L2 h, d ask turtles [9 D; _) b8 c( |% N9 x
if energy <= 0 [ die ]
; A+ V5 b6 Y( e ]
# u7 k4 y: n) f5 g, v& dend) g8 _" P$ N+ s! a6 T
to regrow-grass2 J: X! O, F- `2 t
ask patches [1 u8 j: b2 \4 u% i8 o
if random 100 < 3 [ set pcolor green ]
0 q4 X# x; N6 T ]
$ N% y0 }8 S# t2 ?end& ?! T8 |* Q. R4 S7 A1 a x
to do-plots% r b/ `0 [4 O3 w5 s
set-current-plot "Totals"
: V6 @& J' D8 n8 b set-current-plot-pen "turtles"
% K. T$ u5 a% Y. i5 N2 D plot count turtles5 g) M. p4 I0 n
set-current-plot-pen "grass"8 k% l. Z* ~# A% C
plot count patches with [pcolor = green]
9 Z2 @) _2 o$ q# H9 Nend% A' N8 E+ I8 h) e
可是运行时提示no such plot: "Totals"
' R9 k) R9 _+ r' X8 j: v" ierror while observer running SET-CURRENT-PLOT
# K- y. o. ~* Y% t1 ]. h/ K called by procedure DO-PLOTS
! `9 O' g0 o" Z( e5 G called by procedure SETUP- D* N% t) ^2 V% R% ^% ^
called by 按钮 'setup' z; M3 e9 U7 w0 j$ R
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
