我编的程序如下turtles-own [energy]! F3 n4 B7 ^% {( c$ P" q' b
to setup/ t% C) d( F+ i( |; L/ R& H) n6 l
clear-all
. r4 B0 S1 ?, }3 ~$ y( @ setup-patches
- H4 X/ L$ r/ Q create-turtles 100, q/ o0 r( M2 C/ c4 N
do-plots7 t0 B9 X& R5 h( { n0 B
ask turtles [ setxy random-xcor random-ycor ]
* H1 N" C3 ~+ q( _0 nend
8 V4 @) U# ?( V# j/ Yto go/ C' M- q6 f8 z; F7 j% F; Z3 |
move-turtles
8 F9 n5 v7 [' {6 e% A4 W eat-grass3 e& Y4 w, |% a& u. G: p
reproduce1 l8 o" b* U* L' K; ?! I9 L( ^
check-death
) D$ A; L8 g" o3 A- s& Q, Q6 Z regrow-grass( G9 s; ^. m5 Y2 E3 f3 L1 G
do-plots
+ W6 N5 l7 f, x% \5 dend
2 c6 V' g$ B4 }& Lto move-turtles, M( ], z- P! `8 L; `
ask turtles [
( g4 G8 Z1 S& L8 R8 F8 U: ^' e right random 360
% c. ?; x, i5 ~- U' W+ n: a forward 1: O( I6 X+ W+ [
set energy energy - 1
5 n9 O" R0 p3 T# Z @8 |3 V4 D ]
\. G. U+ G5 x$ d$ Z- X. H7 nend
5 Z3 J$ C4 R3 ]/ A) H- c% _to setup-patches4 ^! k! \$ P7 Z9 Y( H
ask patches [ set pcolor green ], v0 [7 Z; J$ k
end
! L# G% o5 c/ t, U% Hto setup-turtles$ V z; l: R5 G
create-turtles 100
* |' U# }' M7 x' ?+ O( |1 R* T ask turtles [ setxy random-xcor random-ycor ]
. o, N! O* F ]: S/ lend$ Q: R+ L& p* g* @, s" R3 {: I$ L
to eat-grass7 F; G3 B; X, |3 g! p+ c% j; j7 `6 i
ask turtles [
! I% Q+ A5 M: U4 M if pcolor = green [' o% K X1 [1 P+ w$ q9 ^
set pcolor black
% p( a+ O. e% P- H( y. [8 s set energy (energy + 10)
- T( ^# R& W, J/ o ]/ K, o. a7 e) w! c Y6 d& x
ifelse show-energy?3 f/ a$ ?* w6 @" x- f! s
[ set label energy ]
+ z1 i' W3 X9 x; ~7 B' ~ [ set label "" ]
( @( q [8 Q' \; Z* ]# T; L" g9 d ]
, @% ]4 F. n' P7 E2 |& gend
$ _' Q2 u- u3 a/ s- E% b% v$ r6 Vto reproduce
5 [" Z/ F. F0 }+ i3 u ask turtles [
, k g0 Z2 s* h( H) e2 ]4 ` if energy > 50 [
2 [1 g' K; A4 e$ m8 }9 u1 } set energy energy - 50
6 I0 q. Z9 N d1 u hatch 1 [ set energy 50 ]
n/ t7 B2 A. a( C2 b4 ? ]
- O: Y" \$ i3 E* m* D ]! b; }% o. F) Z1 a A' E o
end4 ~7 T- P9 g2 @
to check-death
) M# I: ?% F# g( c ask turtles [
3 h& |, J% @/ \4 ` y' }8 d6 P! v- d if energy <= 0 [ die ]/ r, O0 }8 I5 q$ F% @
]% d& p/ |8 J* [2 a* d5 d5 H, r
end
8 h7 n, l( z8 Mto regrow-grass! \' R" G! |# d. S* D' l& L
ask patches [8 f5 Y* H, X3 l4 u+ ^7 C3 Y3 E
if random 100 < 3 [ set pcolor green ]
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end/ c3 u/ V, w C% z- q' I7 o& y
to do-plots: ?0 q# c2 m( G* M& @1 N5 e
set-current-plot "Totals", B1 W, P0 [. z. b
set-current-plot-pen "turtles"
& U' l& {# ~, G3 ~5 l) o plot count turtles
7 D, j- w5 G7 r" E- G: p4 f set-current-plot-pen "grass"3 }! U& S# y" A4 b3 H* f! q! K
plot count patches with [pcolor = green]
5 ~2 [: o: M" \' zend/ Y/ }) e' Y: H. j5 W+ J
可是运行时提示no such plot: "Totals"& y! P) ~$ J# D: c
error while observer running SET-CURRENT-PLOT
8 m% D6 U' P U7 B, r* n+ b. v: M called by procedure DO-PLOTS
% ^4 V% c3 q9 c F called by procedure SETUP
# f, r I5 D3 M) f. a: y called by 按钮 'setup'
: @" \/ ~! d* b求大神解答啊 |