我编的程序如下turtles-own [energy]0 Q- O$ j! E1 ]1 y" t
to setup& v/ y/ R$ s# ]: s, {8 P( ^0 o
clear-all3 j0 j$ @1 O( K/ B
setup-patches* n' z/ G- }8 t+ Q" n
create-turtles 100
- w* X: H9 g) ^$ i do-plots3 s. {( N5 }- y, u' C
ask turtles [ setxy random-xcor random-ycor ]
! F/ |0 G$ n# L) l: eend/ k o3 N, m4 @: b( w
to go
7 m* M- k0 X. y3 @1 @* ] move-turtles1 h8 z; D8 r$ G5 f9 o
eat-grass# ]* ^" f5 h! E# b, j
reproduce
2 L0 c/ F: y( Y9 k% b check-death
/ \6 _7 ~- z) e- t; _ regrow-grass- L# l" r B. ~( K0 @
do-plots
! _/ T! D/ u% Jend+ _2 ?9 E$ v" D6 b" f8 M
to move-turtles
# W/ G& ]" q# i" q ask turtles [
, {4 k5 X) d# d5 V right random 360! z& ]# J9 L6 H6 O
forward 1
1 R5 m5 a# V" p0 B3 }. L, A set energy energy - 1/ w+ t& T# j- k t
]$ W9 G) ^3 T& \2 u
end
0 Q3 c4 P" d+ l6 xto setup-patches; o; Z7 c: |) \& f6 ]7 e7 f/ k
ask patches [ set pcolor green ]
" R% \* ]+ L6 U8 eend5 ~% \( s7 }& b/ a$ j
to setup-turtles
P! r9 y: s. s4 Q8 `* N create-turtles 100
% T0 {! ]. I3 J- J6 \, c ask turtles [ setxy random-xcor random-ycor ]; l9 W2 C- M. v/ N2 q& \* @5 P& m& P
end
7 C, H* y' E6 P. Mto eat-grass6 B& y: {9 Z' @! J0 d& W
ask turtles [
4 A% \* G' v5 t0 B( g$ N if pcolor = green [. }6 b5 Y% o/ j7 p
set pcolor black$ w( s9 M$ ^. A& r
set energy (energy + 10)0 r3 b6 ^7 M: W$ |$ x
]
5 Q$ j/ R( n* C/ s$ Y2 n ifelse show-energy?
* D. N) H5 r- c. \. d [ set label energy ]( T+ t |: c8 u0 o- f# `! b8 E
[ set label "" ]; p: A% D5 e# R T- {0 T8 d9 I
]8 e1 t/ t F/ D* |/ A
end
; `" o; ?( b8 J9 M5 A4 p! Oto reproduce
) }! L1 u3 l7 n% ]) M. F7 d7 `8 u* j ask turtles [
& c' R, l6 k# L# G/ ]& k) \ if energy > 50 [- N, q) t! j' e
set energy energy - 50
" |! u! V: s& a2 V/ ` hatch 1 [ set energy 50 ]
5 [8 N& X& @8 D6 H ]
5 Q1 d3 T; t$ I Q* y; V7 `" y' z ]$ ]" `+ c) D+ @/ G0 w+ T
end# F6 J% W: n4 e3 h1 T! Y
to check-death( H% g( y `9 F. b% e
ask turtles [
i( D+ H* r5 s* [" c. j( K$ s if energy <= 0 [ die ]
% \. t* @$ o. J ]- u, K2 j: x* x+ h9 k: m' z
end- y1 ]9 M: O o U U
to regrow-grass& t k% e$ ^! f" u; S) q4 G
ask patches [
% a! I1 `4 R- ? x if random 100 < 3 [ set pcolor green ]
! C' U1 Y3 R) b% K6 j; N ]
- U9 b* g ~$ p# Z3 Aend2 A+ e( M) t" i
to do-plots* I# L3 @7 M8 [+ q( Z+ T. I9 s
set-current-plot "Totals"
" z2 Q5 R$ y/ S: m set-current-plot-pen "turtles": p e5 h m5 `. j; c
plot count turtles# A6 n, }: }. `8 p1 l1 Z
set-current-plot-pen "grass"
8 H1 q9 P6 @3 r+ E; [ plot count patches with [pcolor = green]
3 i1 @9 P) Z5 o" T! E# Rend
- w, v( ]: {+ ^( [可是运行时提示no such plot: "Totals"7 Q8 u" Z# v7 j! q. \ H
error while observer running SET-CURRENT-PLOT+ z6 S/ b3 D+ o& _/ N
called by procedure DO-PLOTS
) h3 M, `, l- D called by procedure SETUP4 [* }$ R7 Q9 {' |8 Q; `
called by 按钮 'setup': X7 }4 l) R5 s% f$ l4 ?
求大神解答啊 |