我编的程序如下turtles-own [energy]1 u" g4 F" |& T/ T7 Q
to setup
. y( t) V% n7 b; z8 } clear-all; H& }* u- z8 \- R1 P
setup-patches6 }; T2 ?# j* K+ {* `1 w2 b
create-turtles 100. T1 |0 k+ P+ E. |! P
do-plots
+ }6 ~, e; a/ l( U4 y7 F ask turtles [ setxy random-xcor random-ycor ]
2 t. ^$ s5 s9 x, Z/ D$ x$ \end" _8 Q7 y1 w% K) Z
to go* U- {. ^, o! `8 J: o% U% S$ Z
move-turtles9 j) N4 F0 X/ X* y: L2 b
eat-grass0 R( w4 m% W; ]/ h
reproduce; v0 L/ P* h( i0 M
check-death
9 k$ k1 q0 \3 V# E# C" p9 [+ J regrow-grass; k* Y- x# l9 L7 E4 G! L- Z+ y/ T
do-plots
" m, F' E6 F9 k% a/ o- }# Eend% H- Z- A6 k7 e/ W& @
to move-turtles
' B5 D7 a' C* Y7 j7 A T ask turtles [2 u7 }+ z" f2 @! t. a" n
right random 360
: q2 E6 r0 y, B1 p# m' p) P+ z forward 1) A# O: U: A) U; v' J
set energy energy - 1: P) T& b* T. g# d- j' h
]
. ^: ]- C# g9 d4 Eend
$ `1 X, |; |& i; V0 Hto setup-patches- s4 J8 k" z* ?3 I3 P5 d5 t
ask patches [ set pcolor green ]
5 h: V- B0 }& W q2 V# k. k. n6 send, M1 C1 T/ x" B7 K5 H( U, N
to setup-turtles
9 D4 E8 \3 g# Y create-turtles 100 P) T& N, `6 N7 S" T
ask turtles [ setxy random-xcor random-ycor ]6 ?) @4 U7 W+ ~' e' N, ^( j
end2 ^1 k+ B$ H; S' ?4 S
to eat-grass1 ^7 c7 ]2 o6 c( w' L8 h
ask turtles [
, ]. _% c2 b- X& U2 m, L* C: O" C if pcolor = green [- x3 Z; \( W* f, d4 G
set pcolor black9 G: F+ A) _1 {6 g2 v1 ?
set energy (energy + 10)* J) x! R/ _) s& |
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ifelse show-energy?# ]3 v. V( N4 o6 ^! V3 v
[ set label energy ] s. t% W) ^" h! G0 _) Q* n
[ set label "" ]
4 W7 I/ f! K4 Z' N ]
: d; F* e C# b, `7 q" Oend
& d: y( ?" X$ m& [: W+ ^to reproduce& _2 x _+ T2 D0 B4 F7 a4 S5 P
ask turtles [$ l! w9 a/ F( _9 _
if energy > 50 [
, R7 {9 X) e( {- X( y% Y8 I1 P set energy energy - 509 m4 Q; S% q. J
hatch 1 [ set energy 50 ]
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]
: n- O2 C6 v1 z7 Gend% W+ }( | [& C1 U3 w: `
to check-death
) h3 J; V# {5 b6 q7 s ask turtles [
4 m' U) l. L l if energy <= 0 [ die ]9 |: c2 n4 z9 r) G+ x: _8 D! Z3 G* A
]( t3 v& E3 K5 t; t$ c# }
end7 _ u( Z( u+ S0 k
to regrow-grass
1 v$ ^; w$ {6 {6 c. c* X8 c6 @. T) _ ask patches [7 J, |6 Y: D! d: w, h2 L4 s
if random 100 < 3 [ set pcolor green ]6 \+ L' q8 s' }3 a- z, a. `1 q& e
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end
+ w& ]' p3 ]9 h0 Q/ s+ g+ oto do-plots2 `# {* C# M# i8 z' O
set-current-plot "Totals"
! O, p# R6 P4 |! M2 D' C4 B: f set-current-plot-pen "turtles"4 P9 `, K* Z5 s7 U4 l" t
plot count turtles
: B' J/ R. @$ C set-current-plot-pen "grass"
) Y7 Z( x, d& i1 T, Z5 b# J; j plot count patches with [pcolor = green] r. P, X- G q" F! I6 g9 b
end
' ]1 y, [( h9 k0 ~- s2 X可是运行时提示no such plot: "Totals"
" P7 I# |8 O! |7 j. Y. g* U" Zerror while observer running SET-CURRENT-PLOT( O6 c$ L3 x9 [! y
called by procedure DO-PLOTS; H, k; l) h; t
called by procedure SETUP
+ W! ?/ U& E6 }; u2 T5 o3 \ called by 按钮 'setup'
8 P- l1 x. F+ K求大神解答啊 |