我编的程序如下turtles-own [energy]
- K- n6 X( `' D, H$ @% }, A+ O" P9 ato setup
- ^. ~/ x x/ i. F( u% `: r6 t1 y clear-all9 a: j! w% ?& d9 B/ s5 h1 V' E
setup-patches0 I8 A( ^1 N- F. T5 M
create-turtles 100
& l& z& `7 A% g6 s2 d" Y do-plots5 W6 U+ t3 T5 V3 O3 n }
ask turtles [ setxy random-xcor random-ycor ]
& {! t. I4 ~4 Q4 T1 tend0 Z. ]9 Q7 w! G3 u A; Y# s+ O2 U
to go
* T V; j5 }; I! Z move-turtles7 k2 J$ B! j5 P4 ~; }
eat-grass
& D# \) f3 p- `$ l. u4 n reproduce! \/ l- t$ y3 S
check-death
& s9 V% x5 ?4 \. T/ u3 j: L+ Z regrow-grass& c; S' P6 B) p
do-plots5 Z7 T4 A- T {" P0 E
end
- e! f0 k" i4 r( q4 qto move-turtles: Y5 J3 T K* _+ Y E3 ~: g G
ask turtles [
# _7 k, e: W8 B2 A- `6 s right random 360
! `1 V: U% S' b0 A forward 1
! W8 D( X; T$ a* J7 b set energy energy - 1
( y0 ~* s, o. G ]
8 Q3 o" h, R5 V& qend
# a% {# X6 v$ I- ^; }5 ?to setup-patches3 x3 M# r% W' I$ M) ?
ask patches [ set pcolor green ]
5 p: d9 {8 u8 g* J8 W% m2 `/ Send4 d& H* W! t0 w! e6 U/ z; E5 i2 c# V# |
to setup-turtles/ B- b& r1 C8 _' V: f' a8 @
create-turtles 100
, b) _$ d1 y1 \ ask turtles [ setxy random-xcor random-ycor ]
0 w8 n" \# P% \3 ^end
0 l; H6 h2 s- W6 ~" Z3 y9 `to eat-grass2 B. p% ?& j2 Y+ Z& p5 r) t
ask turtles [7 N6 D! s8 `2 x& W
if pcolor = green [0 m- _( B$ I6 Y
set pcolor black: o3 p0 d: L$ \9 H7 |
set energy (energy + 10)
# F. m% T; {2 M: v! c2 e ]
5 X- h. [" b3 |) P+ o. T/ D, \; V4 k ifelse show-energy?6 g2 c0 Q; h3 u- j+ Y
[ set label energy ]$ L! q& J% v: Y! X
[ set label "" ]
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end% d0 O- J: Q! N0 Y8 ]2 U3 s' F
to reproduce, w5 Q+ }; E5 w4 G: G
ask turtles [
5 J, Z& C: _& J1 Y0 W: L if energy > 50 [) e6 L/ ~* V( m6 ?' S
set energy energy - 500 _9 w/ A) E6 S# F$ K0 U
hatch 1 [ set energy 50 ], W$ _ W7 r2 O0 J1 e/ @
]
9 r- F7 g/ l3 p E ]
4 z/ U" f8 ]; send
6 z( }# M2 X6 q, `/ |/ Z* Tto check-death8 a. D: r/ V$ M2 H9 j( [/ ?
ask turtles [
5 q" z! M" g5 \7 N3 X if energy <= 0 [ die ]0 x8 S: [* c2 x9 v4 u4 |0 p
]8 f/ w/ M2 z. i. @6 \: {6 u
end
8 [( E- t, Y% [( N. p% G1 fto regrow-grass
" W# u) F* E0 P; k3 Q: { ask patches [0 Y: @- V4 d) [7 c* G
if random 100 < 3 [ set pcolor green ]& q0 }0 _7 L% z: \
]' ?6 Y( P/ K# c2 U( T
end
2 M) h9 Q! C5 k& n& pto do-plots
+ m. r' C6 Z6 j X0 [3 M; @) N set-current-plot "Totals"
8 m) z* e% b& C; X! B4 J, ?( A set-current-plot-pen "turtles"
" ]( ?6 W$ b; {$ J( O1 O plot count turtles0 q4 A) v, O8 p- f) c% S
set-current-plot-pen "grass"
/ r3 u& T4 I+ H" x6 [ plot count patches with [pcolor = green]+ d/ Z5 V' K2 a1 W/ I( o
end
0 e9 M% E3 v1 Z9 t# g- ?可是运行时提示no such plot: "Totals"3 h; G& g; M. T1 C. @' \9 L
error while observer running SET-CURRENT-PLOT
/ q4 L8 m. m! Y. w, G, {+ V, ~ called by procedure DO-PLOTS6 A, R1 x8 m% [# W* x! O% {
called by procedure SETUP- W9 }& M/ f) E
called by 按钮 'setup'
2 S$ S; X: \/ n T% {/ q求大神解答啊 |