我编的程序如下turtles-own [energy]
1 ^2 y. n) @/ {4 b% I& d) Q/ Qto setup
1 Z) ?) |% j" N clear-all
* A: \% L& s) }9 o setup-patches
2 Z0 w5 F b% `" W- a' x create-turtles 100. U7 k9 r; Q3 c% u
do-plots
: d+ V9 i- |( \' V$ i1 r ask turtles [ setxy random-xcor random-ycor ]
! t. j; X7 b+ L: R8 n" Oend4 X7 K+ \) ?1 n2 Y0 F1 w% J
to go; z w6 y5 O! L: P+ @' E# @3 D
move-turtles5 d9 h# k# c; L
eat-grass
2 w$ a* v$ ?, o+ o$ _8 e reproduce
5 V% ]7 D9 f E/ ` check-death
4 }( W1 a* t8 e* F+ q& s( _0 l regrow-grass
+ I u2 [0 z$ Z6 G W3 l do-plots* Q" l4 i- e" a4 }3 |0 c
end& M ]6 |$ I0 F! q5 Z. s
to move-turtles* q" y5 X" d" n( `0 k( j
ask turtles [
) ~8 H- |) j- u( j5 y right random 360
2 u) t7 X- {' k; l' T' l) G' X forward 1
0 I, U3 }; x3 {& q' l set energy energy - 10 C, A) P, I+ y" x1 y
]1 r5 e* X& E3 U7 z9 j. C
end4 j; c& g# F4 j" U. V' D
to setup-patches
5 H m8 G1 @0 G3 y$ R1 L l# Q1 c ask patches [ set pcolor green ]
& t. [' A+ Q: X# D, o# k# x( Qend
( z% ` ]6 F# j. o1 Wto setup-turtles
1 _1 H7 L* T+ _! v create-turtles 100; X0 u+ N: ?0 }( A/ v8 a- J. a# v
ask turtles [ setxy random-xcor random-ycor ]1 f/ D$ _" p7 E; N
end% N- s3 ?8 W: I' Q6 k4 d2 x
to eat-grass% I5 K9 A" j" i
ask turtles [
1 |6 n/ x6 ]) Q1 c% G% i# S if pcolor = green [
5 Y0 T% X8 U0 s: M3 m; t4 Z- C set pcolor black
& b; O! \* w @/ l5 Q set energy (energy + 10)
' [! P; |* W0 e' k( N/ n ]
d4 V! \1 X, g+ m+ ~ ifelse show-energy?' ?% k* }( U; P) U0 h
[ set label energy ]) b: e$ @, z \3 [1 c
[ set label "" ]
7 j5 M" {) F5 s* _" k8 z ]
8 q/ L Z* n& ^! O4 Tend
Z- d; q2 S6 o9 k/ F$ {to reproduce
. r/ z# i @9 x$ j7 {0 t ask turtles [
; _3 O | E; ?; d5 `4 j& W+ r1 L if energy > 50 [
# } f# n) W' Z8 [( F set energy energy - 50
& B1 }& h8 J, g1 S- | d& D hatch 1 [ set energy 50 ]# ]( u9 } v2 u( b$ C" R' M' l( W R/ \
]
( B5 J* u7 R5 S# ?4 o% z3 \3 X ]) k, ?* a7 F. d o* q
end: B6 |/ P+ p4 d {( b: u
to check-death
+ w/ b% `: O6 Y' h4 ?+ w+ ^9 F. { ask turtles [0 S8 W. U. J, M) X& ]
if energy <= 0 [ die ]
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$ T% X8 I4 ~0 e7 W& `2 |$ fend
' s, Q7 p' E( g5 }. ^to regrow-grass
8 a1 P% q* @# ]/ F. L; Y+ o ask patches [8 L& j) N7 T+ z8 G, p4 l
if random 100 < 3 [ set pcolor green ]& a# }3 W; z# k' I/ u9 O6 y1 C
]
; A) |# K, ~* ~" w1 Kend
' a8 I% l3 q0 o: Ito do-plots8 o6 _7 I; _/ F, x
set-current-plot "Totals"+ y' Z7 ^: Y. o0 ?1 F! D
set-current-plot-pen "turtles"
$ D; n, ~ W0 P6 K plot count turtles. k& s5 A- U: G% \
set-current-plot-pen "grass"7 W% k( `8 X' A: e: \3 X' R
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
, x; l: U- R: y% K" terror while observer running SET-CURRENT-PLOT
) n7 f/ w4 Z! A" h2 x called by procedure DO-PLOTS
" G' d- k2 {1 z. D called by procedure SETUP
& I* W3 ?3 N! y+ J9 w called by 按钮 'setup'
: u& y8 B- q; c& X求大神解答啊 |