我编的程序如下turtles-own [energy]# Z: W3 }# K, q0 I) S
to setup
- I& \% e1 Q) r2 I; f V clear-all2 u, g- a V! M! ~
setup-patches" m" l# m# D* k0 M
create-turtles 100: Q! t% A- j5 J5 G* ^; w8 ?
do-plots
1 D2 q. d" i9 H9 Z% g, K% v4 V0 T# i6 M; t ask turtles [ setxy random-xcor random-ycor ]
* s& B# G ` R, H$ O# g; B; p$ Pend
2 D7 Q4 F/ J( a2 b$ Gto go7 _' U5 g, G( Z
move-turtles
, H( u$ B( R/ @ eat-grass" k# `* W1 T. q% i
reproduce
' D" E+ z' W9 n3 V( D, ~ check-death8 n5 ^3 _+ n6 ~' C5 D
regrow-grass
& S' X% m9 I8 ~* ] do-plots, `6 h3 `- o1 ]# C5 E' g+ C+ X) L
end# n$ S g, g- _! {; `9 }
to move-turtles
& Q, Z$ _; \* t ask turtles [6 v+ D) z5 t$ M; e, @; g
right random 360% k# S8 k2 G5 y$ W7 e! q( j
forward 1
. `7 E+ Y7 f8 N J set energy energy - 18 F( k- _ v' r5 i# [
]/ ~. Z6 Z& _3 w2 n% Q. f
end) L8 s- \! f& J
to setup-patches
# ]3 \4 h' N3 f ask patches [ set pcolor green ]
0 @( ]) |$ e" \& W$ o& {' u0 }end& N% R) B' o! \* G% `8 W7 a. X
to setup-turtles
" D8 D' [ v, ]* a, S3 R3 S" B5 \ create-turtles 100
7 q* Q( o* R$ J3 j ^ ask turtles [ setxy random-xcor random-ycor ]
/ e% Y) J" ~+ N9 G3 eend
- P4 a8 y2 x1 T+ o* q9 b. Oto eat-grass
8 d1 S* |0 |* X8 M( {4 R ask turtles [7 I7 _ L% |6 B1 b& V- t: w6 `3 Q
if pcolor = green [, J$ @+ L% K9 I c4 I* Y
set pcolor black) J, E1 k7 h: T5 O
set energy (energy + 10)
- B6 l( U3 }* @ ]
8 [ e+ U6 ]6 Q0 R$ D; v! l) m ifelse show-energy?' @2 {7 q5 p& H- O" t$ u
[ set label energy ]: S* ?$ v n) @+ H; W5 V
[ set label "" ]
% E7 M, x1 ?+ N" A! N' Y/ k ]
, ]7 b8 ]2 ]3 ~' Yend
* p, z m: H4 E' X, f. m; K( lto reproduce) T7 f! z# Q1 N2 e/ D1 q
ask turtles [
7 E+ I9 m' Q4 k: K if energy > 50 [
& L$ O5 {( C# r/ B9 j7 h6 n2 x set energy energy - 505 k3 ^' E0 L/ u+ O
hatch 1 [ set energy 50 ]6 w9 w* f& I3 w/ E: K5 f
]- d7 U& w+ l3 o/ u) r e& S
]
4 V/ K9 W0 G' Y/ Xend
z; ?$ b/ }/ B9 |- Fto check-death
" d- u) k n6 j( {4 z5 S ask turtles [0 y. `6 ?+ g. m' N5 ]) y$ {2 {
if energy <= 0 [ die ]
& F8 y* j0 N4 K" h9 S' [ ]; [+ }. b0 {7 R( P. Q1 ]1 T. J
end; g2 }: }; e9 r2 F; W+ T5 J
to regrow-grass
) `) m' X4 ] M: ~, O. z. A ask patches [
& E$ K" ]4 |! X4 b. Y if random 100 < 3 [ set pcolor green ]- L, W8 v: C% h) q! s# l8 k# C6 [
]
3 g' r6 G- ~! h7 iend6 q b/ J& t% s' ?5 b6 _: e3 l
to do-plots2 R, C1 v7 l8 J0 j. `" n
set-current-plot "Totals"
3 S) l9 h: @+ ^( n" l8 Q+ r# w set-current-plot-pen "turtles"2 ^3 Z$ Y7 {+ Y2 \
plot count turtles
5 K2 I/ j" ]" h n0 g/ { set-current-plot-pen "grass"
) g. F/ |. K2 c plot count patches with [pcolor = green]
( q: S, K2 }% Z$ C* V. Eend
+ N \2 N, I+ [/ s% K可是运行时提示no such plot: "Totals"4 _8 F0 F" } p+ Q& B& p
error while observer running SET-CURRENT-PLOT. e: J) n6 C; q
called by procedure DO-PLOTS
' M/ z3 ^) j: M& f" r1 z$ ~ called by procedure SETUP
6 x& s6 G+ d* e/ z5 V! a called by 按钮 'setup'
4 O' p N; f9 ]求大神解答啊 |