我编的程序如下turtles-own [energy]6 S$ Q4 y* T8 n8 F- ]) u9 R* }
to setup
' { I1 M( P( j# g clear-all
) ^9 E* P, h( g. U n setup-patches, \# p$ d8 t" G5 q( B( Z
create-turtles 100
* U* C" Z' K0 m do-plots: a2 [/ G" o5 \- B
ask turtles [ setxy random-xcor random-ycor ]. P* Q9 W7 ?& R
end
8 V- }3 c* z4 H6 K- |; r% H% dto go" h+ E: {6 X- ^; q
move-turtles2 q7 \2 a7 n e) ~
eat-grass
: |5 [3 I2 e. H1 n# P7 W5 r' I reproduce7 y0 K8 Y- h, ]7 F
check-death
$ z @! Z3 L: E+ ] i regrow-grass% x* P; f2 n* O) k' Y* z
do-plots
5 y4 m+ Y7 X2 ?: e1 Z( v( vend( W S$ @1 G9 m! a0 a
to move-turtles
* p2 T3 Q2 U, _1 F ask turtles [
' `4 \: Z5 U$ i4 u3 h6 l. c right random 3607 T1 [0 b+ {9 D
forward 1
/ p) {9 a8 }' o- F! F4 [ set energy energy - 11 b. }0 Y3 s" U9 i! F
]
9 W$ {" v7 L+ @* T* W* [, @& v$ eend
1 a$ ` e* J8 H9 I: r) wto setup-patches
8 y0 X" {' f4 @. ]" n ask patches [ set pcolor green ]" s, V* X& j% n
end9 m- G. N: o/ G- p8 o$ R1 t) j! i
to setup-turtles' u9 z: u P' g) R! P8 w
create-turtles 1006 |6 F2 y4 S4 P9 w- J8 i
ask turtles [ setxy random-xcor random-ycor ]
& _8 f: @7 \; nend
) {; U9 y$ r8 c! K- `1 H2 E9 Kto eat-grass9 T7 k) Z- N/ t8 C# i- s9 A
ask turtles [
- M) C# U5 b2 d" _0 b+ {6 L# ~ if pcolor = green [1 u0 S0 @* q6 Q& X5 H
set pcolor black; @4 k+ M; M% g0 V
set energy (energy + 10)# ?- }# x" p6 g! b$ T' G
]
[+ q- A4 v( @ T ifelse show-energy?
+ w; |( o+ p% |, h) @, H" V( G [ set label energy ]
4 M5 c) d! L% v) F! U [ set label "" ]
/ L, H2 c. J( D8 y3 c5 ] ]
' z5 J: _5 x2 v2 w2 V7 E# aend
$ N* r* B+ d6 n' [to reproduce6 z. ]1 t2 p2 g
ask turtles [6 C0 p9 l b( g0 \
if energy > 50 [
! W. @0 ?% B' q! ?! E& T1 n set energy energy - 50
7 }. b& h3 U% Q; Z6 Z- t4 g hatch 1 [ set energy 50 ]& Z0 L V# A( ~- w: ?1 D' o
]4 n$ z5 W1 S r0 F$ m( h
]$ Y' t; W* |6 l M' U3 w5 k
end
8 Z2 f+ n0 E% t: x. P; K, k( zto check-death% ~- r/ V" E2 E1 x0 P
ask turtles [ |8 L2 i$ D( G6 k7 o
if energy <= 0 [ die ]1 [$ g& P' J5 w9 W1 s I1 ?
]( M* \) e. `6 Q
end
% W; ^4 r2 ~+ M* ~to regrow-grass# `6 v, H4 P7 F
ask patches [
6 v8 C: G4 G1 b% D if random 100 < 3 [ set pcolor green ]
3 C7 ?& j b5 U. U( n" R) F+ D ]* y$ O+ ]# w8 Y0 q2 b- s. p' ~
end
0 q. r6 N6 q9 u A$ Y' Fto do-plots8 J' E3 X7 n) p. ^
set-current-plot "Totals"
4 y y: v' E0 c set-current-plot-pen "turtles"$ x/ G2 e! E' h' J; p
plot count turtles) }; A* }6 ~) T o# y, x1 f m- o: ]
set-current-plot-pen "grass": W+ K' d0 b% I7 A2 \
plot count patches with [pcolor = green]' c `" n5 ~+ p. X$ ?5 K+ k( [4 B3 E
end
( J( O5 E5 L9 u6 A可是运行时提示no such plot: "Totals"* W' D% Z) M' y% D! P# A5 z: P
error while observer running SET-CURRENT-PLOT
4 ^; g8 \% f4 a: r! s) l called by procedure DO-PLOTS
|8 i- w& V7 u7 |0 @ called by procedure SETUP
' z9 f) p+ U8 |5 Q$ Y# M called by 按钮 'setup'! P. A) A$ v. g& X
求大神解答啊 |