我编的程序如下turtles-own [energy]) A' M- ~/ s# {, S
to setup) e7 {# f( L: x. r# P
clear-all/ I' r! c. y/ w8 Q' q8 N+ U
setup-patches
/ ^' h/ \$ H) }4 o* }& ]. I create-turtles 1004 \# w# z4 A X; p4 F d" C
do-plots
! R- m" d; a, F# _, A D5 k; ` ask turtles [ setxy random-xcor random-ycor ]
& J# z4 }+ J6 }( O$ C3 Qend: b. M+ c; z9 @6 e3 T3 t, c; M' d
to go
2 h) F( n" Y) X move-turtles
1 l5 Z$ F( [2 J3 w* w) ^ Z+ |$ T eat-grass$ A$ `9 A, D) n5 t) q2 h
reproduce3 m' M7 o% \* N, `& C+ G7 O
check-death8 [7 M7 u$ p5 s1 ^
regrow-grass5 k+ B5 q, Q) W, C
do-plots; G/ M; v- g+ z
end
/ R5 N9 w, A& q* O# j Cto move-turtles4 k) w" L. W2 v0 q
ask turtles [
" R9 R0 r7 ~" }3 J* m) h6 F right random 360
" S9 B* ?: w# A- e8 x2 R forward 19 @2 N- l( y5 ]" U
set energy energy - 1
( a% Y+ t9 N' ]. ^ e$ l ]+ R" ~- t; m) N& b, `/ {; ?
end
1 w: p' X- A+ p/ D$ ]" Ato setup-patches# ~; n9 F+ g1 s6 `# W) E
ask patches [ set pcolor green ]
6 {9 \3 W; D( H8 R; `! zend
3 [& z7 t1 D+ O/ `- E/ _4 Y/ Tto setup-turtles9 R. l1 z+ e& J
create-turtles 100
) c; e7 i$ g, X. a ask turtles [ setxy random-xcor random-ycor ]
0 _8 o; [4 j; f. e& `7 Rend
: y2 H. {' k6 `4 W8 tto eat-grass
- R! d+ R8 C+ n* Q( K- R& ?$ M) u ask turtles [' @. r7 y0 w% @
if pcolor = green [
8 `( K) |3 A8 U. L7 F$ @ set pcolor black
' T- ]; `0 s8 u6 X+ ~1 R set energy (energy + 10)( F/ q( ~' s3 ^* Y8 @8 N
]
! a \: v( L# j ifelse show-energy?& x3 j9 k+ J1 c+ U
[ set label energy ]
, ~/ x# E. ~8 k" v [ set label "" ]2 r2 i" \5 W* D/ B' l! X
], I' h6 O! [+ [6 i
end
+ X4 n# j9 e2 U# ]6 L2 n% i4 mto reproduce% K; p- S& s# H
ask turtles [
. U* F V$ Q1 k4 [% \# x if energy > 50 [
i) B+ g$ E& k set energy energy - 50
+ [5 m7 n8 {3 c& q hatch 1 [ set energy 50 ]) k7 l& ?9 ~4 I5 M5 a$ j3 K
]0 [- p J( i' b; G' A
]
8 x. v% y* k+ }- W7 Qend
1 M& `! R: p9 T& D6 mto check-death
; z/ ~' H8 D# S5 N- u/ B' `- }% Q ask turtles [" n* U `2 A( k$ C; a4 @& E. @
if energy <= 0 [ die ]
/ H$ Z: q6 p& n ]
4 D' u7 v, y# O/ h9 w) O+ |end" q* @2 z" I, G3 C
to regrow-grass: M& G2 j$ h# ]- ?8 J, b8 n
ask patches [
5 g! [( }3 w+ Q. f1 P9 a8 M2 K if random 100 < 3 [ set pcolor green ]
0 n) k7 M8 K N. |9 F. D' n5 d5 J ]
/ V) N, T( ?. i" G1 d* \end
: s7 i% S/ X0 _0 Q( Oto do-plots/ G5 d& _! A( e
set-current-plot "Totals"( d6 ^( T6 b6 d! {( d
set-current-plot-pen "turtles"$ H0 N/ c+ @1 N$ b& G5 j
plot count turtles; u' `# P8 R$ s7 z0 i5 T
set-current-plot-pen "grass"
$ R- f8 d! k# Y) B2 | plot count patches with [pcolor = green]% b( c% b5 H0 N! A# D. K, i. u
end% @5 K& r4 W) I2 }: _$ i
可是运行时提示no such plot: "Totals"
+ N$ g \4 A x# V) w! o' Kerror while observer running SET-CURRENT-PLOT
* k' z% i+ w, O$ l6 X called by procedure DO-PLOTS" C, ~6 Z& C: q' V4 x) L* E
called by procedure SETUP
, P0 i$ G: q8 V/ s# c# F1 I called by 按钮 'setup'
/ `, M- i: R& Q _/ n求大神解答啊 |