我编的程序如下turtles-own [energy]( w/ J+ d6 Z E c
to setup
, w" `" [7 ~+ D1 j clear-all* Q6 S G% Y3 Z
setup-patches; J( L# `: _9 d1 a
create-turtles 100
w/ F# v" K% w V# P+ l* C do-plots. n) r! C- f) u) {4 a
ask turtles [ setxy random-xcor random-ycor ], h- E9 B8 Y6 |
end
. m4 y3 m/ ]# C! n$ Yto go
% o, `7 \; ~% K5 T+ B, @8 b- E move-turtles& I2 V y3 D! | J9 {$ w2 Q
eat-grass* e% T; z+ }' @
reproduce
0 L/ m7 J% Z' d( h2 I* `2 r check-death
( \. c+ z2 d/ t1 A regrow-grass3 Y# t; H) G9 j0 {
do-plots
5 Z0 X4 X0 Q# C# _- d- vend( F3 n/ v+ I$ }1 M
to move-turtles
- H. x l. }; g) Z' _& _; X2 n ask turtles [
: p0 j. l/ M/ Q& w right random 360
5 ^7 M/ Z& V) e- V+ p! C forward 1
0 T& ], ]. @, w' p set energy energy - 1
$ \. o' e3 V3 Q' g$ F0 a5 ? ]" R. h1 n8 y" J5 K- r, d8 f9 c
end
' N2 K- a6 e Y- fto setup-patches
9 H* k( ]$ r3 K8 D. a8 [' F# ? ask patches [ set pcolor green ]; U% Z- f# G) ~' Q: ]
end6 J& j Z4 g* v2 ^: l
to setup-turtles
% r! |# L$ s5 ], n9 W; u3 V" r3 a% H create-turtles 100, K8 ] T7 @2 k; ^
ask turtles [ setxy random-xcor random-ycor ]
/ |! h, E. x# r# i8 e7 o4 Uend
y% I4 y8 F3 S, nto eat-grass
5 [! P$ a% c+ H ask turtles [. ^5 j0 p- I( E1 h g; s
if pcolor = green [
8 c/ E; ~6 J0 x+ @, \! [6 G, x set pcolor black
. @/ @8 } K+ i3 O8 G# w" F8 N set energy (energy + 10)
5 _& w* I+ P4 g* g" X; E ]
8 k4 i; K3 K3 s' o- V: R ifelse show-energy?9 [' q! A7 ~, x" r
[ set label energy ]+ T/ z- M$ F' s" }9 k- q
[ set label "" ]% l* E4 Q* ? D4 X' H9 r
]
6 o/ ]+ |( V. D; V9 M+ Hend3 S* w+ }) E( ~
to reproduce
* I2 ?7 M6 y! l; L' _+ k ask turtles [) |8 @( e) M! |* f+ y$ @0 Y
if energy > 50 [
# P, l" V" J( C; R set energy energy - 50
, k; y0 O/ P/ {( u. B( Q! W hatch 1 [ set energy 50 ]3 i8 f9 ?: k, K8 }3 O0 u( e3 v- Z
]$ p0 {+ k& b+ `" f1 [& x) r
]
5 @4 A$ a+ E" y X( c5 l! I2 S* {end
$ l/ t1 K# d9 T3 {/ y) m! O3 x/ pto check-death- @, O% P) Q+ U( }6 o+ r4 C, a
ask turtles [
+ n) e+ g+ I, j if energy <= 0 [ die ]
+ ~ x( ~8 S- _" F- I3 G& o$ G ]
9 E8 t( }; N( g1 ]9 K% P; |end
1 x" a, f5 W( T4 K9 N/ Yto regrow-grass
1 d/ ], u( [* s2 ~' S% G! d6 ~ ask patches [9 K" t; j) ?. {. b; J0 `
if random 100 < 3 [ set pcolor green ]
- A3 n( q% f, J7 m7 n* d6 Y ]
4 P- Y2 N4 |3 I; G9 Jend
2 R2 p% e2 X, H3 p( q+ G# x8 o' U* }to do-plots
- j. U4 p9 g( {& a1 Y7 ?8 o set-current-plot "Totals"
/ V( Q- G0 f2 ?; z7 v set-current-plot-pen "turtles"# P, x V: N8 v) C
plot count turtles6 |' ?# @5 ^9 M O: [
set-current-plot-pen "grass"
% W4 Z( I+ Y3 J! z6 q plot count patches with [pcolor = green]& Y; a. j y" m" x6 j' f
end
3 m1 s6 i4 M. a6 ~$ h2 H: H; e+ P+ D8 K可是运行时提示no such plot: "Totals"
% f/ h. [+ C8 K! F5 kerror while observer running SET-CURRENT-PLOT
6 f; p, @, S" K( _+ R( U* V called by procedure DO-PLOTS
3 k* S% y0 H4 ^. w" \7 r; \( I- @ called by procedure SETUP* C5 x' ^% n0 Y4 X4 R# D: \
called by 按钮 'setup'3 c+ G/ X. P! ~) x# a' p
求大神解答啊 |