我编的程序如下turtles-own [energy]
_3 b" V& e& ?0 r$ ^5 l3 Xto setup
5 k8 U3 S/ C; Q0 p4 g4 P clear-all
! x" t; t7 [! p" r! l6 ] setup-patches
6 \( C, S3 _# H+ U$ N create-turtles 100
0 N2 t" O& p0 E) Z, H3 A do-plots
2 Q" l v3 G# ^ Q, M* P ask turtles [ setxy random-xcor random-ycor ]
+ F; h$ J7 H% |, s8 o5 c K8 t; S# O% Dend
" B& |; M, o p& p/ }: s2 x% Q* \to go- |7 I* {& s( C. M; f
move-turtles
, ]+ W4 i/ V8 V0 C- s# J3 O y; N eat-grass. B! ~, p6 y* A) ^
reproduce
# R- d% [1 I0 | check-death
O/ p0 w, @6 b, ?$ q7 }, X5 F1 W regrow-grass; n7 L" t! z8 X
do-plots' y# L7 F8 s2 K3 {6 i* }# k) j) M$ i
end/ N7 t, {2 F6 v5 _1 F7 \% }6 z
to move-turtles
- \' F9 I: f) @9 F* Q- f N+ c ask turtles [
' ]! K- f$ l: D7 ]+ o6 w9 ]0 C right random 360 W8 l+ |- o, n7 `( o3 F" v$ g
forward 1
& ?7 z8 q' h+ J3 F, J' a- q. H# o; a set energy energy - 17 M0 [& i6 A Q( U
]
) A0 Y) x, ?" p; E( wend
* |/ f' `$ M8 |to setup-patches( u7 L' _1 {8 B; r1 H* p `$ E9 y2 L
ask patches [ set pcolor green ]
: e5 b. W) }& O2 [3 N& {( Tend- u/ n) q/ j5 i* a3 Q! w. k: Y
to setup-turtles& f* l/ O- }& N f' L) f
create-turtles 100; c8 ?* ]7 Q4 P J* F- s
ask turtles [ setxy random-xcor random-ycor ]
r5 U3 s8 j0 {" J6 [" Tend
7 t3 L! A2 p& x; N/ A3 b. rto eat-grass
7 M/ T: q1 X& O! w% L+ Y9 y- \5 f ask turtles [( } _9 p% \) b* e3 f
if pcolor = green [6 V$ s; Q- |" Y: t0 F
set pcolor black
6 ~/ b# z1 J! r set energy (energy + 10)
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ifelse show-energy?
$ z) `( m d; k% Z' b0 x9 z [ set label energy ]- A7 k; p; K2 t1 O: C
[ set label "" ]/ E( D4 t( U/ d/ i
]# O' t2 q4 H; P d% s% \
end( u& U* U+ S$ T+ Q+ J$ X
to reproduce. ]$ ?4 A7 D7 q$ }' k: y
ask turtles [
" U2 V) L( a; I8 E if energy > 50 [+ M' x7 v; V- i* Q5 n4 I; r
set energy energy - 50$ C( z8 b! @ e2 {( g- e* S( ]* v
hatch 1 [ set energy 50 ]
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]: s9 w0 q) y; J4 M" [' v# S
end2 B7 H P# Y f: P' w; A/ o
to check-death- [! z2 x9 |+ b& I2 d
ask turtles [
7 Y) M2 R/ k% u) O9 w if energy <= 0 [ die ]/ v3 ~6 L! Z6 V2 h. Z# |! M3 @
]" O4 Y5 l! A9 h- ?" f
end
/ y- q& e' j5 t$ A6 I, x5 I5 Gto regrow-grass# N! }" V4 s6 r: e& L- X. ?
ask patches [
# O1 `% v' C6 s) [0 E# h if random 100 < 3 [ set pcolor green ]
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end
( v. T9 Q3 D1 J8 w4 {8 h* Y: _to do-plots
. F2 L/ O. R Y* I! s7 D set-current-plot "Totals"
. Z# G& }# Q9 ~5 r9 U0 N set-current-plot-pen "turtles"
( h; U+ x1 H& j$ G3 w" H3 C h9 K plot count turtles9 {& A; a+ n p ~" ?& T
set-current-plot-pen "grass"
- O* b8 l, R0 D, D3 S: q. h! u plot count patches with [pcolor = green]- Q' Q2 Q! i6 I0 m$ p$ _
end3 k; O# F- M1 i! R8 X
可是运行时提示no such plot: "Totals"! @- V; @9 u* n3 W0 ]
error while observer running SET-CURRENT-PLOT
' o9 b2 o/ o" v- I$ N, x/ I. _0 U called by procedure DO-PLOTS# r8 E1 M! A9 B/ Y- q/ T
called by procedure SETUP
" M5 N1 u) p$ k0 V+ w called by 按钮 'setup'
: `3 }% I/ N! }8 }& g求大神解答啊 |