我编的程序如下turtles-own [energy]
. b: R6 j- g% q! U0 Eto setup
: j2 L R; |1 g o clear-all
! ~( T& J, `7 h2 v setup-patches
+ [. g) O ]. A; o3 Y" W- J' d& d p create-turtles 100
2 t" l! i R- R {. b do-plots, D. {# Q- k6 @" P8 O
ask turtles [ setxy random-xcor random-ycor ]
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to go" G4 K: K5 M8 J# o/ c) F$ |! ~
move-turtles2 j1 _* n: s! L5 h' g1 }
eat-grass9 n( B& p5 l9 H& T
reproduce
7 w: d- d$ m/ F check-death
3 i- R0 P- k. k" Y. T; } regrow-grass
3 ]3 Z: [8 @2 G; h9 _ do-plots, t/ q |* O( B1 t
end
/ W, h" m9 k4 U4 r+ t- ?to move-turtles( d; N2 Y/ l( s: ~; {! E
ask turtles [' T" G% t8 K, p
right random 360
0 [0 n0 e0 r, W* ?9 U. e9 B, f" a forward 1) Z7 m0 n% ^5 V
set energy energy - 1
& b2 `" L1 U, C# `$ n ]8 ^( U- n4 _& x3 \
end
6 c- ]( z2 M/ N5 B8 _7 eto setup-patches6 V: B4 r/ E) `- W, H$ A
ask patches [ set pcolor green ]: e4 w" J0 I. X& O% ]8 d
end
- o- w7 I* [- L* ?( Zto setup-turtles7 { U1 ?* ]1 R+ L* h1 }
create-turtles 100
8 u) F1 }5 V( ^7 g ask turtles [ setxy random-xcor random-ycor ]4 Y% H) U- m9 A
end" S0 ~% {3 u. u4 j
to eat-grass
% g; p) {, u& P: o% n ask turtles [
2 H4 r0 H. k- V( i$ N1 v, f% N$ n if pcolor = green [7 i& Y4 y W5 Q! ?# `. N
set pcolor black, @8 z5 u$ s6 V6 H( g
set energy (energy + 10)
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ifelse show-energy?
, @& \/ V _( b0 l) U [ set label energy ]
( A7 p' c7 |" h5 W! b( z: S [ set label "" ], @! t3 r) `) y1 j5 C
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end2 Y" r5 i# c7 D! |. K; h- q* U
to reproduce
# y8 Z ^1 ]& b$ x/ R+ I0 y( ] ask turtles [
) x f) v2 C# c% D if energy > 50 [6 K+ r3 m& G7 s( j
set energy energy - 503 V" ]) z g% T
hatch 1 [ set energy 50 ]
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4 D1 ~0 i1 e. J# L! F& I( R5 R4 ~end+ }( Y' z- O$ r2 a9 E5 A, k! C
to check-death' y$ L& ] ^+ U9 v8 v4 W
ask turtles [
; S% U6 U5 X& c3 p" `1 o7 Y if energy <= 0 [ die ]
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end9 z. O0 ~0 c; l+ i4 D7 a
to regrow-grass; ]( s1 H1 P6 Y
ask patches [
" L- V9 P- Y7 ~9 o if random 100 < 3 [ set pcolor green ]- k/ J2 S. K+ ~- X- n
]
, z/ W- v/ T) J% v; U3 nend! B' m; [' i+ x8 O! c: w
to do-plots
7 B5 B9 _7 J6 m9 } set-current-plot "Totals"
3 T8 V$ g. {3 B; X: j" T set-current-plot-pen "turtles"
& J" f! I3 ?0 y+ G plot count turtles0 `0 p" U0 R/ K) A
set-current-plot-pen "grass"
2 Y. |# Q+ P# S" b8 O plot count patches with [pcolor = green]- v, K& z Q! H9 E2 S
end1 p& G4 W5 j$ _0 |0 C4 Z
可是运行时提示no such plot: "Totals"
- R: t- c$ B3 g, Derror while observer running SET-CURRENT-PLOT
; }# a5 v o1 J1 } called by procedure DO-PLOTS
( p5 `4 f- q9 U called by procedure SETUP& K/ o- d5 `2 m7 _" J- [! ?
called by 按钮 'setup'
5 N& D: J7 e4 d# W' W求大神解答啊 |