我编的程序如下turtles-own [energy]3 S( d# s9 t' n0 C3 S2 K, p
to setup
1 R0 {" H" t7 q" C! d% T clear-all6 g* [; ~9 e: |: U
setup-patches* x- c, r# X5 N
create-turtles 1006 G' b! R- g# [% _- M9 e T
do-plots
" s& a/ \4 n/ b# R2 [ ask turtles [ setxy random-xcor random-ycor ]
2 U! |- l- F5 Fend
1 V- I3 u2 h6 C- Z1 m& wto go. N/ v3 W: Y" J( }( O7 C4 X
move-turtles& J* e7 |* Y3 N a
eat-grass4 ^; }; \$ }+ q( y' G1 I
reproduce' F" l* [9 m+ v
check-death
3 v; K+ R2 x w3 j regrow-grass8 [5 ]5 s- F* K' I U# L5 S1 X8 x
do-plots# b8 c6 h; a0 t0 o2 N+ X
end3 x* u1 ~, g4 V' |+ X$ n
to move-turtles
% O; w7 E# h* ]$ r' D" u8 I+ { ask turtles [
1 c4 W8 D8 f% w right random 360. G& Y0 f7 i0 N& c( y
forward 1- m! g# @1 N$ b- e& f, p
set energy energy - 1
1 B' Q2 M/ O! a! [ ]$ T8 z7 ~2 W* |& F+ A
end
0 z8 ?* H7 I7 }+ ?9 I$ uto setup-patches0 J- m2 s# |6 ]# [
ask patches [ set pcolor green ]: l3 R |7 U' k1 l+ G6 Z6 O
end* o( Z) D9 e9 r/ o" \! Y
to setup-turtles( X* Y2 G4 ]6 @- U
create-turtles 100
4 M: f4 d5 _6 N ask turtles [ setxy random-xcor random-ycor ]
2 Y# c. J* B3 C; ^end
( X6 \% y# ~* n. O4 H7 vto eat-grass/ U- \' e* y4 @) F
ask turtles [
/ ~' ? r6 e7 `/ I7 g) p if pcolor = green [/ m8 W/ {0 k2 {0 i4 B. `5 A) X
set pcolor black& c$ ]) u1 M% q4 c. v+ C$ g
set energy (energy + 10)5 {% L* _ M2 X; ^% {3 \3 q; B
]
. _$ ~9 @* Z) \/ z7 Q ifelse show-energy?$ O( F* V _- ]# f1 ~
[ set label energy ]
5 T" X9 j- r% G( x& m [ set label "" ], Z. x& D) @. z7 G
]! b5 V& h9 L6 d8 o8 i- M. {8 L
end* u+ E. G8 f3 A
to reproduce5 j, G+ \0 g- q( X) s
ask turtles [# o# D3 R1 o$ s3 N8 w4 S
if energy > 50 [3 {, k2 A' e- o9 i* [) p' h( V0 C
set energy energy - 50) x% t9 t% T* K. V5 l+ V. I' ]# u, q3 I
hatch 1 [ set energy 50 ]& l$ Z; z8 H" [/ `+ T
]( @/ [# ~9 g5 H! f9 L
]! U/ T8 T. \, q; g) K/ }& U
end( w& D* N c8 t/ s
to check-death! D$ {6 c8 ?# m* z
ask turtles [
2 R2 @# E2 w! ?( K if energy <= 0 [ die ], l( b2 G, G+ w* N
] Z/ a" E4 T- `. I
end
& z) ]6 D& j- r/ u" J! e8 [to regrow-grass! M, B+ w1 t2 k, ^$ b
ask patches [
; y! K8 Z0 C( C) D6 z5 A8 H if random 100 < 3 [ set pcolor green ]* U d7 O+ t7 k8 H
]) N* @' P# U, k% k$ E1 v. r
end
: \" ~2 T- C9 d# p, P" cto do-plots5 C6 H! j; q3 v/ }. ^) @! f3 j
set-current-plot "Totals"! o6 _3 p# [4 |/ @+ R+ k1 R- V5 y1 I' `
set-current-plot-pen "turtles"
5 J0 D8 t: i0 Z plot count turtles$ V; d( ?/ I2 K% n! Y9 g- ]
set-current-plot-pen "grass"
M; A+ H1 X) N: A/ s2 h) p plot count patches with [pcolor = green]
$ B8 r# N( }: r- |" l9 Gend- Z. c% f3 V1 c, V2 s6 @$ x6 \9 n1 x
可是运行时提示no such plot: "Totals"
5 Q, [% `" |5 |$ _1 I V, f nerror while observer running SET-CURRENT-PLOT& Z, p3 S" r# r9 R: ]0 {3 S C
called by procedure DO-PLOTS
; e; Z1 g4 y" F" ^7 Q' k5 Q called by procedure SETUP" {3 p% ~4 N& Y, H) \8 c! A1 @0 H
called by 按钮 'setup'
3 I9 g7 s( M! Z* a: ^求大神解答啊 |