我编的程序如下turtles-own [energy]( |5 o) Z4 r2 Y+ ]1 p* @ I) q& i
to setup
2 ^9 q$ W ?! {! y% z+ @8 N clear-all$ _6 X, F- L% _) e& D9 m
setup-patches
) s. t* I) n, \; Z# d create-turtles 100: b% k7 V8 v7 L) H$ b9 k" B
do-plots: t% [5 K" C) o- A7 x4 V& @+ u% o
ask turtles [ setxy random-xcor random-ycor ]
$ ]# c) A2 i6 u; l7 Aend8 S- H+ _; A( N7 t' J, k' s+ e! L1 v
to go o8 G* c+ e$ a R# x" K
move-turtles
# R( o* ]$ L# J. H/ A. a eat-grass
3 \1 ?3 j* B) P/ S5 {: u1 B2 Q reproduce
3 }; j) Z, M5 e6 q1 S: K: C* T check-death
4 f7 w' m8 b6 m8 L. T+ L& j. K regrow-grass
4 Y3 |: w a8 k; T; o do-plots) U$ q' W! Q5 U2 @
end p% O- `8 B6 V6 O) N4 ^
to move-turtles
9 F( E# r+ u+ B- B3 H ask turtles [
/ @1 i0 R, f" i, }, G; I right random 360+ d3 O& X2 Q: T6 q, Q
forward 1
' B" t( E3 N( [; }+ ?6 v( A set energy energy - 10 H8 r f' L4 r' c( b, ~; S
]
. l4 m1 J, q6 Gend' V3 t3 h( b, T
to setup-patches) q# Q% l6 w8 |
ask patches [ set pcolor green ]. K# f- e) C8 F- E4 X7 A
end
& W5 l: M% ?1 X' Z" W+ c Qto setup-turtles
2 r- A7 } Y+ O* _! y7 A5 W+ m create-turtles 100
0 G3 [; T8 E7 R8 ]7 {) G( l$ ?" c ask turtles [ setxy random-xcor random-ycor ]
' }; G6 D4 R: O9 t/ Tend, y8 A! c8 _5 Z0 ]5 ~( @
to eat-grass6 b. C- v, ]# r0 g6 P' O. O
ask turtles [+ j& Y, G4 M1 L! Z7 R
if pcolor = green [
* b6 h, |7 p5 C set pcolor black
Z T8 b' k' f' v6 s0 O7 O set energy (energy + 10)
+ ~2 y, |9 L( J7 A ]
1 Y7 n9 s3 n$ |7 m ifelse show-energy?
, Y3 L6 E3 P; }' i [ set label energy ]. h" J8 N; k6 _+ W
[ set label "" ]0 s. { f. x+ S, @% A+ R
]3 \6 H4 l* }$ I0 V
end
8 T l3 n. v$ h- n5 v' t0 p, Dto reproduce
* [5 E; r+ v& \/ \+ W( w ask turtles [
5 g2 Q5 E- b/ e3 Z; X if energy > 50 [
. F, J% B/ F% B O2 ` set energy energy - 502 b b5 `& S' S
hatch 1 [ set energy 50 ]
) y! B' z* c+ i7 m! c9 p ]
+ L: N+ B+ ] j" B* J4 O2 T ]) F1 y0 J5 h1 i: c
end
7 q: y, ]9 u6 m. J2 c+ U U5 Eto check-death8 U( v6 X) b H4 I, d: B
ask turtles [
$ \7 g( {1 p0 A& X& F' j# N( f. X if energy <= 0 [ die ]2 x6 ~' I: b7 \
]) c9 B' D7 o5 w( j) c
end# K4 i h5 N c, C2 Y* a* ^! b
to regrow-grass
% W; ]3 G W8 K& T9 o0 z* v% O ask patches [
/ P9 z( x" W: l if random 100 < 3 [ set pcolor green ]6 E2 B5 x0 A- Y& P; v/ ]
]. f K4 k" L- G3 t8 f
end: v# {# Z4 ]/ D
to do-plots
6 M" z- R/ `2 ?6 L& J" _ set-current-plot "Totals"
$ P: n2 G k/ p. L; d set-current-plot-pen "turtles"5 B0 T/ \& a" `$ N' U& R
plot count turtles
9 t* ^0 Z' P" z set-current-plot-pen "grass"
7 X" `& T7 {1 K plot count patches with [pcolor = green]# N7 Q- D0 |3 J1 M0 d3 l3 i9 C) B
end8 W4 G/ Q* u8 \# K; h, r+ ?' h
可是运行时提示no such plot: "Totals"6 p* h ]2 i) \6 F
error while observer running SET-CURRENT-PLOT' h# Q8 D1 u ~% i# L* k! T
called by procedure DO-PLOTS+ w4 y3 V5 V v2 b
called by procedure SETUP q/ x" J) `' w6 S& X1 _8 h
called by 按钮 'setup'! X, F0 T; G' P' I; |4 n
求大神解答啊 |