我编的程序如下turtles-own [energy]; j% g2 L; T/ J* A" d. S% y8 V
to setup' d6 N" ]2 {0 E1 g% o$ d' F* I
clear-all
2 f+ r# Q) A2 j- Z" Y3 o setup-patches
" |# q* I! Z( s' Z) S$ t8 F create-turtles 100% i# t$ \$ F% S
do-plots; h' L* S; R" g; B C6 m
ask turtles [ setxy random-xcor random-ycor ]& g6 @) C% P* f2 r
end: h: K3 R8 f" e' W; v; N
to go
8 D3 y8 D5 p g move-turtles# i% f& L" Z$ c0 Q
eat-grass
?- G. L: |* ]% V reproduce/ s* \3 {4 j, h7 R
check-death
; r O* G3 p) z+ K5 ~% z regrow-grass( w/ G$ ]! O5 [& n* w% X* |- l
do-plots3 s9 J. L* [; Y
end
3 X4 j' q: S. z/ q. W2 Y& ~: }to move-turtles/ r: b( B- E& O- ^
ask turtles [
5 Y. |9 E, U! [& Y4 i. G right random 360
* s1 t7 w; Z9 ]* j# m forward 1+ ^( r- j2 R2 D. V9 B( y
set energy energy - 1* H3 }. w% @. X }1 `, F% Y T* }
]- n6 ]+ V/ A3 U# Z
end
( ^! f" H0 y0 W( C0 A: ~8 _3 M! Kto setup-patches* [7 u+ s+ O. t1 H M, m5 o
ask patches [ set pcolor green ]
$ o5 j* ~: o7 Z9 r- k; Xend0 ~8 ? Y q( J% n* Q8 N' |8 ~2 ]
to setup-turtles
1 a# y7 D8 }1 F. L( }. d) H, W create-turtles 100
+ r2 s6 s/ m: c ask turtles [ setxy random-xcor random-ycor ], T2 ?0 ^# D1 b6 \7 U
end! T! _! S4 @8 S7 k
to eat-grass
+ R+ t" B6 w. R ask turtles [
# S( z" {! T/ f7 D6 Q+ Q {# T1 R if pcolor = green [
r F" W0 f5 R3 ]) X& o2 X7 Y set pcolor black
8 L4 r8 y+ [) l; a set energy (energy + 10)
6 S2 `7 ]2 l$ D+ T* Z ]# Y- ]/ T& v: D8 L5 R6 y
ifelse show-energy?& r: E5 u. K$ r9 j" ^
[ set label energy ]
' A4 p5 C) X" V6 [( P5 p+ t/ z [ set label "" ]# y+ Y' v& m4 F- l( q% ^
]
& o5 a4 t4 O4 V& |& N4 z. s- B7 r9 yend
3 _! x5 f. b2 e- |4 Z* `! Oto reproduce, k+ s4 r0 e9 \& b+ h# m
ask turtles [
4 s3 p# }. @' ` if energy > 50 [
4 G6 l; h6 L% P2 P7 M% R set energy energy - 505 u5 M5 i, }0 {5 r4 u+ c+ I+ Z
hatch 1 [ set energy 50 ]
$ f4 x, e7 j8 v# l. n" ?8 h ]
2 V/ o$ M3 c" a ]# M6 B; \4 _+ W& R* ^7 Z s
end
) p/ q. M' ]! K1 r6 u7 z% zto check-death) O- A+ \; S/ B- y$ X% p( J
ask turtles [
; B3 O3 e# f/ v P- S* [ if energy <= 0 [ die ]
* X- x7 g" _: S, U ]4 l0 i( D O, p5 b+ _' P+ \( O
end+ L0 y B2 Q0 N0 `% |) b. F4 r
to regrow-grass- w% C$ [' }5 h8 _9 r; V6 ?
ask patches [6 `$ M2 [6 h9 J$ m% y
if random 100 < 3 [ set pcolor green ]
/ p! d9 f7 ?6 i0 w ]
& c( R* D" }7 T) h7 C; p. Qend4 q4 a! Z9 G+ D8 S9 u
to do-plots
, d5 Q! j2 f/ S+ A set-current-plot "Totals"- o6 l; L; O6 i9 {. t+ Z! `; Z
set-current-plot-pen "turtles"
- Z! V$ }! m, m2 v" }% f plot count turtles
: M- E% U- N+ S( _- b8 `, F set-current-plot-pen "grass"
/ e0 H A9 ~- i" @! \% Y; y$ C) S* K plot count patches with [pcolor = green]
- G G8 ?) z. jend( R! b/ Q3 w: U, p) V
可是运行时提示no such plot: "Totals"
& j7 k$ w# @; h) _, \error while observer running SET-CURRENT-PLOT
7 o8 ]; G! n6 p called by procedure DO-PLOTS0 Y$ a6 a, v/ \& U( k" {; m, J* i
called by procedure SETUP
/ C: y& r! r" Y6 ~. @" \3 J called by 按钮 'setup'
7 K& n; {/ B# Y: `求大神解答啊 |