我编的程序如下turtles-own [energy]% R" M. c( I3 a' t% p+ [* B3 @
to setup
+ j" w% `% H* M/ v2 Z: E clear-all/ s* F( _/ z; j! L7 F" o
setup-patches6 \! b+ J/ [) e, _3 C, D
create-turtles 100
: U7 b3 E; \$ {2 O# y& u! w do-plots! ` `7 v9 x. m8 q; m3 m* |
ask turtles [ setxy random-xcor random-ycor ]
1 u! X4 Z$ m5 _5 G0 gend
& |3 S6 p+ ^6 F+ _4 V5 d kto go
9 @/ Y3 W9 V) _+ q7 ] move-turtles
4 b7 d8 g7 n5 S( ~7 N# B* z4 l eat-grass$ y0 D; ?6 |7 d& A( } J) e/ f
reproduce; Q; [. h7 n+ u( @0 i0 e
check-death
# X% N5 l6 m/ H$ q) F regrow-grass& J, }7 `- i) F
do-plots9 q; X: A9 h( }
end4 |5 |7 L5 l, z' G5 J
to move-turtles
7 y& Y$ P3 D0 m* h1 R- P ask turtles [
5 \; @( V' b3 X: H right random 360
# H6 D8 x+ {- y4 [8 v ?+ q$ o forward 1
$ [# T6 {6 U! Y& f: r# [ set energy energy - 11 t/ C9 V1 t4 [, i
]
0 u5 N' b9 t+ Z2 x8 ^7 N) G0 `# yend
% ]: |9 I t& T7 V0 Y) [! B4 @to setup-patches
# E. C4 {8 n" ?& I ask patches [ set pcolor green ]0 |: a! X+ |' A1 C0 M+ G$ O7 x
end
5 S5 i; y v% `! ito setup-turtles
4 o2 p7 r v. ?1 E! N0 b5 _- B create-turtles 100
) s% g9 H( B+ z' q ask turtles [ setxy random-xcor random-ycor ]
: G r" z, l# N% S# Nend
+ c& n$ q" c3 G2 K8 `to eat-grass& t% `% j8 N) I1 W5 Z, P, L/ p
ask turtles [
& a0 P0 B3 K9 C8 N; g( a f if pcolor = green [0 v5 w. u9 L5 N( }" e' N
set pcolor black1 L% Z# l; ]. h. y3 [, o& w
set energy (energy + 10)7 C) ]& l6 A4 k, U b. B$ V
]. }5 _7 c/ O1 [+ T/ u
ifelse show-energy?
9 n! J% |1 o0 H$ q [ set label energy ]
- @# T3 A& A. n+ N! z+ ~7 r2 ~ [ set label "" ]
, Y) t9 Z$ }/ D, \6 T/ O* e$ W+ q ]
- ?5 e, L' S& a! G3 dend- `+ n+ g% H0 ]7 c, i; e( y8 q
to reproduce' r. |- E! J* t d/ r' U& J6 Q
ask turtles [
, V' s" G" c, O. c# I1 q- o7 v+ S if energy > 50 [2 w# |3 t$ R( a5 q2 V" [2 [4 w4 g
set energy energy - 50
. M k8 Q+ f! D) t* f, Q4 \ hatch 1 [ set energy 50 ]& C7 Y/ f9 @$ p4 `4 I3 R* b6 e
]
2 i: O0 }( i0 E ]7 k1 M0 S, W1 | g- g2 \
end
4 m' B O9 Z3 @* U4 Xto check-death: k- f7 R0 l# |+ u. Z3 @& j
ask turtles [5 o" }! Q" `) K6 i
if energy <= 0 [ die ]0 j- ]0 F% U: x" a3 @2 v- L" p
]1 l C) l' D! B
end
2 m D& \, ^- W4 B2 Kto regrow-grass' ~/ | U# d' {9 n" q
ask patches [' S( U0 @- d# ~- b
if random 100 < 3 [ set pcolor green ]
1 [8 J2 p1 C9 w4 E1 X ]4 P4 ?: u4 F- r4 t) a: Q
end
+ R& G# O0 d6 P @/ Bto do-plots* E: G0 ?# k3 z
set-current-plot "Totals"
/ u( \5 z0 Z* M& o, m' g" B- L set-current-plot-pen "turtles"
" m. i% M' B: B( T& b( c8 Z" j g plot count turtles- L& J4 u3 _1 `
set-current-plot-pen "grass"
+ R; |7 @5 H0 F) S. s3 g plot count patches with [pcolor = green]
$ w" [( A5 p2 k0 [end$ J" @8 w. E+ Z$ N
可是运行时提示no such plot: "Totals"
& b6 J* U# K5 j3 h3 p( B, xerror while observer running SET-CURRENT-PLOT- K8 R$ B5 M# c
called by procedure DO-PLOTS
]! a: L* {9 R1 G called by procedure SETUP# O7 G: z$ x7 r
called by 按钮 'setup'
- F( W& j; N, `- F6 v9 M求大神解答啊 |