我编的程序如下turtles-own [energy], v" @+ y) |( h, J7 @% V K. {
to setup
Q8 j& n* j( F. D9 Z% I clear-all' o: d, A9 b. q
setup-patches9 g6 }- s6 s. l0 u
create-turtles 100
2 Q. c0 \7 R/ h do-plots
4 c; }/ S; `3 I# f ask turtles [ setxy random-xcor random-ycor ]
/ `( e/ K% e) d) hend
b( ~- r* |$ N( Mto go
1 T$ r# C2 k) W9 S5 H move-turtles
- x, l4 z( J( x8 X% ^$ e eat-grass
( E+ y" W, q! ~) F: D reproduce
0 h" }! }1 I& m6 v0 a" U check-death3 k4 J2 `7 c! g) h+ ]
regrow-grass1 e/ {) @- k6 n" z, Q
do-plots: L8 O" X2 U w& ?( ? D# N
end
- _" z. U/ G3 j1 r/ m3 kto move-turtles
* ]$ n8 b4 c5 ?. L ask turtles [
* D6 ~/ z9 A9 x0 S$ b right random 360
4 i/ @- N* S4 C( Z) h forward 12 \& |2 d7 F! p# h' b
set energy energy - 14 y/ `+ F( N0 A3 F4 Y
]
) P8 y& B; i3 e: {3 L. B9 }end
" I y# P! F+ P1 E" rto setup-patches8 [6 ^) D& ]1 Q/ l& h
ask patches [ set pcolor green ]0 T+ t+ L8 h: B- m7 Q1 Z' F
end
2 w$ e2 C- A1 V/ Rto setup-turtles
" Q& L* c2 d, }. m# ` create-turtles 100
! y& I* r- x: }* b# |- Y* }( [ ask turtles [ setxy random-xcor random-ycor ]
) Y& x: Q: H, n6 m+ T: I/ kend
* p) Q/ b4 D+ Q/ p5 V+ I6 N4 h+ Uto eat-grass* Y2 `5 G7 V; a4 W1 f
ask turtles [
s J& P' { ]* e: \ if pcolor = green [
7 K( s- L' K% @& i* J/ @2 T set pcolor black
+ @* s) {* l8 w- l set energy (energy + 10)
9 p0 q2 B/ V5 A1 l% ~& E" M/ z5 L. C ], r1 e' f* C' ]9 _; P
ifelse show-energy?! v' n, `2 D! H! w6 z1 S
[ set label energy ]+ G3 M5 g. n0 m1 [: W/ q0 k
[ set label "" ]0 Q: y$ A0 S/ i7 R
]. a/ c3 V& s& h& c
end* ?7 \8 Z; ] ^) ?1 e
to reproduce9 k& R# e2 c1 X& J& ?- Y( R" S
ask turtles [
7 d) P3 A$ F% b4 P$ S3 w) c if energy > 50 [
1 a# Q# ~4 y# J* Q+ L set energy energy - 50
. g- i. p' \* D9 i( b hatch 1 [ set energy 50 ]
+ U9 c* b# a; U Y% O ]: l* ^& Z, C. F, g
]! I6 _ R3 {9 M' r3 B
end
7 W, U$ t/ C, t& G; k8 Ato check-death
/ C$ ]( q7 H* ?+ K9 R1 L ask turtles [3 O) N# t( m7 J( |+ ]
if energy <= 0 [ die ]6 ] P1 B- g& s- s7 Z" A
]
0 f. _9 d. _0 k) b8 m+ ^: Tend2 E# J6 `7 {/ X; m! D7 U+ m9 |
to regrow-grass3 k2 @% R$ q: D2 X
ask patches [4 g6 k! g- y: S6 l4 e5 w6 g" P9 y9 ?/ H
if random 100 < 3 [ set pcolor green ]$ W" C, w# @) o* x* ~5 |, K" G% g" H
]
0 s- a1 }, p6 m" @6 qend
& n3 B9 M! H% k0 \3 k. eto do-plots
0 G9 u: o' \9 I% s# f0 c# B+ E' v set-current-plot "Totals"2 X4 ?$ d7 b& O3 z8 ~
set-current-plot-pen "turtles"6 N1 s3 A8 o# S$ r* Y) ~, P& M
plot count turtles
1 W. A# r' L. B6 X, [- C+ [! \4 a set-current-plot-pen "grass"( V) C3 t% J! E/ D
plot count patches with [pcolor = green]
4 }' Y# ?8 G0 q( i" [) d6 Iend! E: l+ W! R Z5 ^6 f
可是运行时提示no such plot: "Totals"4 ]* H' e9 z/ T8 c2 b; s5 f3 u$ H
error while observer running SET-CURRENT-PLOT
0 ^* `! D; v5 a, u$ n called by procedure DO-PLOTS( }. E0 ~1 F4 w: t% F' m% ~- P1 ?, ^+ Z
called by procedure SETUP
9 \/ B _$ U d0 c( x( X5 t& G; O called by 按钮 'setup'
9 Y( k: T* i1 ^2 a求大神解答啊 |