我编的程序如下turtles-own [energy]
/ v( `" r+ g* R7 }' g0 xto setup
5 M2 B! Y2 V* Y2 K" ?- Y clear-all
% E8 E8 R+ C# N3 h setup-patches7 M9 @- [' o' w: C( B% X! @
create-turtles 100* F3 @9 o* {0 N
do-plots4 F( k- c+ d f3 B: ]0 @
ask turtles [ setxy random-xcor random-ycor ]
5 T1 b1 p8 N0 C" g6 d' X& y) m; D% c9 Tend
5 u& r9 p( t5 m% {% D& Fto go
! k( w N3 Z: E1 H3 } q2 R move-turtles2 ]$ _: R8 V! F
eat-grass* D0 h# y$ @: i. }
reproduce- X4 T. d) Y& U9 \' N0 R z
check-death
: m- w+ w1 R& }- M& V4 j regrow-grass
6 ?, B1 A1 G) w: q+ w do-plots8 q. f6 N; ]' D1 p
end
8 C% q! F" m: g3 M1 B- ^; Hto move-turtles8 B7 K" O/ K! U0 }, e
ask turtles [: ^; _5 `* @1 c% Z: t6 h
right random 360
% B1 x4 }; }5 ~* W* L5 T* _; a forward 1
4 W' v$ M$ N! l6 Z3 z% W' u" \5 v' ~ set energy energy - 1
) g' S5 c: A+ O) L" s6 D8 b ]' q: n) @. c4 h/ b9 }- a# K
end& e4 V- P: q8 k2 z% \
to setup-patches
" v, O; ]2 c5 j/ N/ k- P ask patches [ set pcolor green ]7 m [2 l6 o; O
end
7 ?: C2 Q4 c, V5 s, F4 @ |to setup-turtles
# D4 S; Z* _3 q6 s( b: J create-turtles 1002 a7 O& d' f& `% p9 d8 Z' T' ~( o% k3 x3 [
ask turtles [ setxy random-xcor random-ycor ]
# t7 T* n1 N) ]end; K( Z3 F' l" Q5 V1 d! C
to eat-grass
4 C& v/ t' ~' s6 d# d) F ask turtles [
/ n2 k( j i9 o' ~ o if pcolor = green [ f+ @. K9 x) O1 ]" p6 H U! u
set pcolor black9 j8 Y9 n9 H% H o5 n2 X( u% Z* a! w
set energy (energy + 10)
! @$ n9 y1 C% K) } ]
V% L3 q, v8 e3 H( \8 Y ifelse show-energy?
* o7 W# k* X7 r, U0 Z [ set label energy ]9 |* ^% W7 _. H* s3 k/ H3 E
[ set label "" ]; X: l3 f# j# o
]7 q9 c9 x6 ?% K8 K3 S0 _
end
. o) g) `! k) Z; l9 J) Zto reproduce
( w7 U- q0 y6 i/ R0 K' ?9 V ask turtles [
# c" D) W! t2 ]& I$ t" D2 H if energy > 50 [
2 H% K8 x) l7 Z( F+ r0 d( Z set energy energy - 50
6 V% M/ N2 P7 V5 [, R# Y4 z" a hatch 1 [ set energy 50 ]
2 W7 |4 J7 p$ U ]
! C6 t7 o; @# c2 {1 \- F ]9 y* L* Y$ f0 N: o6 K% ?) w
end0 C n3 ^+ F. z( H4 `9 a; g
to check-death0 s( j! _2 W; |/ L
ask turtles [
3 B' Y1 C9 o1 {1 a' a+ g0 M if energy <= 0 [ die ]; {( G! l7 H* I4 y
]
0 @# \) x, e- I. C/ X) T% Aend
! x* u, q( Y+ g+ ~to regrow-grass: i. n! Z. `3 i
ask patches [
6 y: L- T$ d) ^, n if random 100 < 3 [ set pcolor green ]
, c" A6 Q6 _7 F ]' i! c+ s0 r2 K
end
8 M8 q0 w8 u& ?' Mto do-plots7 T, F& a1 ?( y1 Z2 d3 Y
set-current-plot "Totals"
0 o9 p @/ u, m8 I set-current-plot-pen "turtles"! u( W- g$ D% l
plot count turtles/ `; ]4 `; E1 F" d
set-current-plot-pen "grass". {& o3 Q) F9 O
plot count patches with [pcolor = green]1 \! Z# _' g" J1 a; h- i7 I
end+ x6 p6 m9 T+ n1 |+ x8 b( ?0 [
可是运行时提示no such plot: "Totals"$ y& T3 o4 P1 y' Q% z, `
error while observer running SET-CURRENT-PLOT2 e; T6 s0 |: @6 ~
called by procedure DO-PLOTS
& k$ o6 E7 |8 a% R2 n called by procedure SETUP$ l4 M! Q/ w/ l- M P) q% V' e6 H
called by 按钮 'setup'; U- Q2 n" C6 `
求大神解答啊 |