我编的程序如下turtles-own [energy]
' K% C/ A# H0 |/ i' Hto setup9 ` a- z3 a9 M$ H, o& V& G5 e
clear-all
7 [; A% l; }9 u- K setup-patches. z1 p$ ]' j' {; f
create-turtles 100' I [) N. d! L1 U5 Q' E$ [
do-plots1 i9 Q$ x; ?$ O0 m. d+ i1 s
ask turtles [ setxy random-xcor random-ycor ]
# W: b3 n7 f* C! Z5 j0 V* Q" kend
) n% e6 G$ j G( E' z+ cto go
$ v+ G* r) h" I* ~# @$ E move-turtles
, J' L1 E( H6 R7 p* s2 p: F/ z, @ eat-grass, G5 }4 ], n* h$ u& |9 f$ O
reproduce' U8 p+ C* `( {( \0 x. Y
check-death
4 G0 M& j9 B. r, t/ `1 \' e regrow-grass* k4 X' y6 U0 _; S5 n7 ]7 O
do-plots9 a6 ]7 c1 G- Z( k* A: v; E
end
7 V( U. }0 K, S# `. Z7 ito move-turtles+ |- e7 A2 s' H }& @* [
ask turtles [8 d2 g1 ~9 g9 f+ h! s. q1 y
right random 360' u* f/ u1 ?/ c3 P
forward 1
) m* B& ` ]$ w2 X3 Z' ~5 F! L set energy energy - 1
- w: U7 |) J5 x3 y" a ]* b% [& |3 u$ i8 \" Y0 d9 _0 n# F Y
end
9 F+ c2 v7 W ito setup-patches
. T. X% X& r+ y* k$ j0 z: P5 { ask patches [ set pcolor green ]$ _3 o+ A2 Z9 J2 G" Z- X" E
end9 D# K* H4 h. O5 h! j8 ^; c
to setup-turtles) e% x* C, P, c+ \. y5 M3 l: _
create-turtles 100& ]/ w' P* z Z5 J6 \
ask turtles [ setxy random-xcor random-ycor ]: W' `& n' @. a! D: ]( r; r" X
end( Z6 e& ~0 p6 J) d& w
to eat-grass" I$ x( ?7 j6 X: T% m$ p
ask turtles [+ ]1 x! q" Q, i" I
if pcolor = green [! A) k b* X: l- u( I2 ~$ e4 _
set pcolor black
% N1 r3 P" k8 O1 W set energy (energy + 10)4 c# e4 M! @; b' J& ^3 @
]4 A. f( E$ M* @2 K
ifelse show-energy?
8 U+ b8 R* a0 i# s( n [ set label energy ]
4 ^$ q9 s3 S( v1 T [ set label "" ] K; Z& x; x4 x# Q
]
) z8 e- z& C% cend
- N' {% p5 \) f' {. G9 dto reproduce+ `2 Q; ~( v; W5 A
ask turtles [
! E/ L3 {5 }- | if energy > 50 [
$ ^" K" B: \& s2 ? set energy energy - 502 J2 A4 `) F: _
hatch 1 [ set energy 50 ]
) _: V1 @! F, q* K+ k0 B ]; x9 }9 y9 O2 l" ~" e
]
0 {, T0 ?6 U; e; d1 aend3 \! O! c! _, u- G) X- I/ D
to check-death, T( y U3 W" q: `
ask turtles [
1 v$ u2 {- h" ^ if energy <= 0 [ die ]
0 l6 U9 V, g* x7 Z2 e ]
7 [4 c" V: x, C- {2 R- }; Q$ g5 L5 }end Y/ Z+ i. ^9 U
to regrow-grass! P1 x# Y& x E" g! ~ N8 g
ask patches [5 X# I; ^* W$ D! R" M7 S3 d2 F
if random 100 < 3 [ set pcolor green ]4 j# j+ M% l8 X+ W4 J$ O+ \: U
]
% F$ v: q: W7 @- O& send) W6 w1 A0 e% ]
to do-plots
/ N: ~$ A8 _0 z% K) p* }" y set-current-plot "Totals"
# R) v5 g5 U, z9 A set-current-plot-pen "turtles"; z4 B A0 h/ s3 _( E6 c3 K) k- {/ \
plot count turtles
. T4 \4 P. W3 k* B/ @, g set-current-plot-pen "grass"
3 m/ u h) Z' `- q, a8 P0 r plot count patches with [pcolor = green]" w' H) G7 _$ N# J: E2 ]# m
end
7 `+ r& `) @1 i+ ~% g1 T& c可是运行时提示no such plot: "Totals"% D% Z2 d" M7 {
error while observer running SET-CURRENT-PLOT. @; @2 m% t1 Q$ F! I
called by procedure DO-PLOTS
& L& F, z1 [. o* @! V9 i& E, g called by procedure SETUP
' y3 {5 m2 i! G called by 按钮 'setup'# X5 f3 B3 f o4 i: D
求大神解答啊 |