我编的程序如下turtles-own [energy], ]( Q: J) d' p* z
to setup9 D5 |3 e; r' |' O, U& K
clear-all1 q% G8 b! l: q$ L
setup-patches; _. L( N$ \' ?2 a% L: s
create-turtles 100
& x1 T* Z+ k* v: m1 V8 Y do-plots
3 H2 E: e2 p f( O9 D4 ^ ask turtles [ setxy random-xcor random-ycor ]# f ~0 ]7 J( D2 s; t9 E8 H
end& h! P4 ]0 ?- D' D. p/ `3 @8 e
to go7 n9 a$ f$ M; g- e% y0 P
move-turtles
\ R) l0 e% D4 o) R' @7 _ eat-grass4 P* ~, E6 J/ @! u, P4 Y! c6 [" ~: ]4 o
reproduce3 t! f3 j3 I* I; c" X3 M' ^
check-death
^# V% ~) D, R+ h& Z7 s regrow-grass
7 t6 x& q( ]% e& E- P9 n; U do-plots
% M8 ^1 Y4 I \4 V2 e; y" Z2 ?4 dend
, f: i# s8 B" k6 g5 y# R; E7 Cto move-turtles% Q. S' m$ D) a6 Q3 F5 b
ask turtles [/ K# g: Y- S/ d( B/ @! `
right random 360
4 ?) c6 v$ D) p* U" r O forward 1
7 W, h' n4 n k1 F set energy energy - 1. M# ^! o& S1 F* ?6 N/ ?
]
4 H0 t; m# `% H9 D" T" I |/ Uend6 W3 y8 m9 B0 [" P8 ^
to setup-patches
+ g% W/ {( ]1 Y7 P" s8 i ask patches [ set pcolor green ]
1 D4 r N0 S& wend j" W+ Q. u# K/ i
to setup-turtles
- F; e' b0 O) D# f: O create-turtles 100
7 T/ y0 ]* b$ o$ l+ j, G- N+ S ask turtles [ setxy random-xcor random-ycor ]' [3 R/ o& }. p% Q+ E* _; G$ h) @- |
end
- H1 [3 |) q# Mto eat-grass4 {+ N% o0 J* z" n
ask turtles [2 l2 J$ J0 c$ Y# G# ^4 `5 ]( h3 C
if pcolor = green [
" ~; |0 N5 C1 _, s, [0 J set pcolor black
' [. {( o, P( a. ?' L set energy (energy + 10)* b* B1 a. N# P
]6 @7 f8 A7 X3 x
ifelse show-energy?
( d% }2 J! F0 Z6 w# l% |+ P. d [ set label energy ]- d/ x$ J6 ?3 v* n& t$ |2 g$ W/ r
[ set label "" ]
* L* V! u! ~ f; i( n ]4 I7 A, Q' m/ R T3 t+ h
end5 G* T4 A! Z2 {1 C* ^# m) B% x
to reproduce
1 _% s. ^/ `$ _# _. l: x1 o6 r ask turtles [9 \! o* K6 ~9 o8 H, H- U
if energy > 50 [
+ o& M# q3 x' e3 y, g set energy energy - 50
4 C: Q$ ], U( q- N w" j7 |7 f' Q hatch 1 [ set energy 50 ]. `9 G4 A8 G7 ~5 ?
]
1 @1 ]( J$ p) l ]/ \9 O m! f0 I
end8 r% [7 `# C o; z0 m
to check-death
) E: t, H$ Z3 I i0 a; J( B0 o ask turtles [$ M" t2 c, P8 B$ K4 s* ^* Q4 j
if energy <= 0 [ die ]7 s7 F8 a5 Y8 y1 d' N6 y( I
]4 F7 N! s; W6 k$ a/ K. y
end
, D4 _: I9 [$ n- Mto regrow-grass- B% h4 j! K9 Z! l
ask patches [
' |0 ?4 K7 U4 f7 S+ [. q8 U if random 100 < 3 [ set pcolor green ]
* ^0 g8 h1 m1 K# R ]$ W" Z/ S! V9 S4 H. T" T. o3 N& P
end
& I6 V6 Z! `* {4 A; m B5 h# zto do-plots
0 t' N6 W1 m% }' a- H: X% O, F set-current-plot "Totals"; ~9 x1 O1 d1 d# }8 W* {
set-current-plot-pen "turtles"
* V/ D" }* ^6 M, b plot count turtles+ L6 I" X/ T5 f2 H7 K
set-current-plot-pen "grass"3 |9 Z! Y. t: r$ y% c, O
plot count patches with [pcolor = green]
* F5 M9 U3 Q1 m) Tend6 t9 Q t! O. s! w
可是运行时提示no such plot: "Totals"
. X3 a" R9 i- {' ^6 V+ x$ Qerror while observer running SET-CURRENT-PLOT
0 R1 }' h0 \2 e: z& U called by procedure DO-PLOTS5 W2 `+ z# ~) O: Q
called by procedure SETUP
/ _, n! j" }; C* u+ y, F; f called by 按钮 'setup'
: g# _& F/ p: Q% \# E求大神解答啊 |