我编的程序如下turtles-own [energy]
- u0 v7 ~" {/ f6 ~& i8 Z5 Lto setup
8 @. r" I; w1 S8 k I clear-all
" j5 V/ R% L! [2 o2 G. j' p setup-patches7 K% l7 \: G3 D: @: V- z5 _
create-turtles 100
3 B9 T6 b; ?% c' E8 b W) [ do-plots) ? b" \. d( A/ M
ask turtles [ setxy random-xcor random-ycor ]
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to go
' v4 A. G" d8 K8 F! |( P- @+ g. s move-turtles2 X1 @2 h3 I/ _% X" L, E3 @1 b. V3 ^3 S
eat-grass+ p {9 l1 \# t1 q% n
reproduce
7 R P7 c3 d A! }9 r5 ^ check-death% b' Z7 {1 S/ K7 b5 F
regrow-grass1 P& j" s: {) h( M
do-plots
$ u* F5 i; n" d; n0 iend) \8 |/ M" l9 V) `9 {3 F! c7 F- f
to move-turtles% Z4 ]# D% Q+ h: t
ask turtles [
, Y3 x5 D" A6 ~4 K9 _) Y: B right random 360
: ^; f" }; X4 x! l/ V forward 1
9 G* |8 P8 n6 z/ u" f6 q6 I, u6 S set energy energy - 1
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end0 [ x/ n: O: H" a& e, k' |) S
to setup-patches
' J/ r+ J! J( l2 h# F+ G ask patches [ set pcolor green ] f5 A0 l7 j3 l
end+ c* C% ]$ A' U- r3 `' j4 ]3 d7 A
to setup-turtles4 Y8 ?- A, u4 L Q
create-turtles 100
' _- u6 x# ~0 g# b6 F' D3 T ask turtles [ setxy random-xcor random-ycor ]
1 m' X3 o* S( ^. L R0 r! Uend
5 Z, c7 x4 F- x4 Yto eat-grass
F1 W; h! W+ W, B; b0 \" i0 V ask turtles [8 U( T/ f5 K5 }! d
if pcolor = green [ G' r: i' e7 B+ k0 w- |' E
set pcolor black
$ R3 u' k, O7 q N* V5 h+ a( j set energy (energy + 10)
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ifelse show-energy?
; h0 j* A4 s% U/ m$ o: W0 e [ set label energy ]! R% r5 ^2 x% x" O
[ set label "" ]
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end
h: w: x7 ]8 X) [. t% dto reproduce' \- H2 V3 d* B; F" i4 k+ j7 L
ask turtles [
" w( d+ R$ M( K5 K# t2 x* \4 K if energy > 50 [
: w' i& e2 D( Q# A9 B4 S) @ set energy energy - 50! S" f i9 J, p% {; ?
hatch 1 [ set energy 50 ]& r. z/ @ N! p6 G* e# H
]
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end4 h% E- q2 @% K4 f
to check-death
V5 {( b0 C) G5 }: S5 S | ask turtles [3 a% L: g2 F; Y) ^. ]
if energy <= 0 [ die ]
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to regrow-grass
+ P3 \7 Y5 g1 t2 H$ c6 \ ask patches [
* v, j# ]4 _+ j9 ?: t& d1 v if random 100 < 3 [ set pcolor green ]+ ~% g! T6 P* |4 L
]
! H- F' A- a' e2 ~- J1 h) l( V& }0 N+ @end! I! T8 T( v$ n( Q& N7 Y
to do-plots% O6 ]+ }7 j$ n
set-current-plot "Totals"
L- w. _* ^/ U" Y' w! i# }6 p set-current-plot-pen "turtles"! K* B1 j& K/ f/ E6 f+ I
plot count turtles& @: K8 m7 j& t5 w( ]) B
set-current-plot-pen "grass"
* Q v" K* I E: ]5 p+ v plot count patches with [pcolor = green]
8 f" x, x. ]3 L7 |. s3 Jend
: v6 \% ^/ ^4 E可是运行时提示no such plot: "Totals"3 _5 E- z _& l. P
error while observer running SET-CURRENT-PLOT
+ L* ~9 @3 s" S! J5 @* v" W! @ called by procedure DO-PLOTS
% |( U! U+ Q: j6 [# L: @ called by procedure SETUP
. g' o( \: a" j# }: W$ }; a) z called by 按钮 'setup'
1 O0 \# ], p1 b求大神解答啊 |