我编的程序如下turtles-own [energy]: I! m( i% E, u( t7 x5 ^6 V! j
to setup8 S) `( Y. k7 @7 Q( O
clear-all$ J% l" X' \, Y K
setup-patches2 ]; s$ K9 l4 B& h
create-turtles 100
, a, J. M( q! V$ C, J do-plots; m2 i# Z4 s) Z3 ~& [
ask turtles [ setxy random-xcor random-ycor ]2 g7 |$ [1 @: M4 ~' ?; L9 p
end1 S% J% T3 y% w' o& M
to go
) `& X6 O* m7 _3 P9 q$ P) K move-turtles: ]+ w l: C* X4 G; q5 b$ M
eat-grass. `+ Y) B2 v3 E, G
reproduce
: G; M% ~( \: M0 o check-death
. j% B& ?. b0 ?; n, q$ x4 I regrow-grass
( C4 e$ u! N, [4 i1 R8 r3 \ do-plots
3 B) j& Q' [" Tend
4 u( a/ M; ^7 d' H: dto move-turtles1 r& M) O0 h1 N0 b* e4 E
ask turtles [* L# [0 b# o( g7 Y8 _9 y6 o6 T
right random 360
6 ?8 p# i# i7 \4 ~1 `* G forward 1/ {, D1 T+ ?# P4 L ]6 L
set energy energy - 1: u, C6 r; Y, p3 |
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end
, o, P- e; E0 Xto setup-patches
+ c! j/ W3 }0 ^ R$ \5 C, P# h ask patches [ set pcolor green ]2 _2 ]3 Q; h9 D1 D6 R! `
end
& Q* L7 H& w4 Z9 M0 p, l: e9 M0 |to setup-turtles
1 h: v- l" ~ s0 a create-turtles 100
) O$ b+ U; h& K# g# ~ ask turtles [ setxy random-xcor random-ycor ]
+ R0 V* I) e6 x" t k/ h) Y5 v, Dend
+ s% c; ?; s% U7 b7 I( Nto eat-grass
& s* P+ b+ x2 l, P6 m+ G ask turtles [
/ Y6 T3 N: Y+ u* H+ s if pcolor = green [& g+ U3 X2 P7 |8 a/ ^! w5 p" H
set pcolor black
4 Z1 [, r. P! [+ O set energy (energy + 10)# F" m; @1 \6 f' l! d R
]
% m8 e3 x: A. g ifelse show-energy?
8 [9 c) r: h+ H7 T/ Y4 ~+ o2 D [ set label energy ]
8 G Z; W4 u" n) c8 Y8 Z4 Z0 n; O0 ` [ set label "" ]- [- V- T9 f! N: z* b6 Q& ^, {
]
1 k, b3 i/ O6 z! V4 Y0 Yend
' T$ \- `+ v) S" t$ H6 Hto reproduce" l) C) U. i. X4 ]( u# \, L5 z2 N
ask turtles [1 e8 e0 ~& z4 A& T2 u9 `) @* J# m
if energy > 50 [/ D& z3 G+ V# U+ w8 a/ L
set energy energy - 505 z4 T% f1 l. h$ @. K' S* d
hatch 1 [ set energy 50 ]
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]+ |4 `# k2 l |: ^
end: R. J- ^( w! q ~. w
to check-death
7 w! t" S/ Q a; d* c+ L ask turtles [
7 g8 P) |: j" \& F# |6 N if energy <= 0 [ die ]
. y; w# i1 d8 b5 @5 p. x) q5 x2 x ]! K. x6 s( q8 v! L
end; j5 Y$ @! [ c+ k
to regrow-grass* Y: R9 j7 x$ N# n. R
ask patches [) a0 P7 o! j7 N$ Y; Z `
if random 100 < 3 [ set pcolor green ]
2 _ C) a+ l. v$ Q" B& u ]
% L9 v" V- N- |9 cend
' U4 o6 y7 Q) O' k' ~. E" Vto do-plots
" W, _( R0 t* v- Q$ q4 i* C set-current-plot "Totals"
0 l2 n ]( N8 _ set-current-plot-pen "turtles"/ W2 o/ z+ n ~, I' ~* b/ M& V
plot count turtles! L8 T5 { s' x' l- R6 F; p, ^
set-current-plot-pen "grass"# I$ l6 Z" U; T
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"8 \7 r. F6 K0 p" w2 p( t7 U2 X6 z/ a
error while observer running SET-CURRENT-PLOT9 ?" }( B5 }# s) L' d+ b3 r
called by procedure DO-PLOTS
8 M7 }1 H# F |' n0 u5 U called by procedure SETUP" @% ~( q! Z8 ~( C. k4 g% e3 f
called by 按钮 'setup'
6 Q3 H( M$ F6 ~1 L3 H" C* i求大神解答啊 |