我编的程序如下turtles-own [energy]
4 q9 a: K% D c$ k8 T" w+ q8 n2 P, cto setup1 s$ h9 Y% D, J( s' s c6 r0 T, M
clear-all( ]5 P" K9 y3 D7 i& Q; w* Q# }
setup-patches
8 {/ B. n3 x: a1 l, W create-turtles 100; a7 t* i4 H6 Y: N
do-plots
' A3 |. u, n+ N9 _$ ]' Y; f) ?- @ ask turtles [ setxy random-xcor random-ycor ] x& v; ^1 b/ I4 R& ~% e
end" g, u- h/ s$ j5 U
to go
" {7 ?8 r! B: [( ]0 \' W move-turtles4 o" r- g5 \1 C2 `0 _6 z
eat-grass
$ {# Q; l p' N: L2 l, { reproduce
( V! C& t# C, r3 X' f* S check-death
0 g: C# h% s: t6 P regrow-grass( f) s1 r8 a6 p% P7 ?" U3 n+ R
do-plots
5 r& v# i( @* ~, k4 send" ^' l* O1 p: t4 S! j4 r+ A, f
to move-turtles1 y7 A' _% X6 d3 I
ask turtles [
/ d- N! z' d1 A- W% m- n right random 360
, ]& c6 |) j. |( n+ `: s: H3 t# Z forward 1
4 I! C" ]$ `, S. s/ k set energy energy - 1. @1 b1 K: P% A* o( y: N
]
' a6 {. t! R U- h7 a1 Gend
8 z ~+ c: K2 ?7 A3 ito setup-patches" e+ d( I4 i" N' ]) p
ask patches [ set pcolor green ]) t8 _. k/ W4 n @ [# n K
end1 L* g% J* ~+ ]9 K- c3 `3 ^+ _1 q
to setup-turtles
$ m7 o& v; y; k4 U) F/ n create-turtles 100
7 L( {8 L% T! ~! l ask turtles [ setxy random-xcor random-ycor ]8 a8 C; M: {! O) q
end
- u; B/ S& O F6 E9 V8 \to eat-grass
) }" {9 d1 i2 _1 P ask turtles [
3 M G+ ^- a6 t( l if pcolor = green [
3 z) R7 ?1 }7 F1 ] set pcolor black. ]/ n6 Y# v; q4 f
set energy (energy + 10): k$ z! }1 v* w/ a" G. r
]# t6 b- H# _/ D1 r6 V3 R- G6 ~( c8 ^
ifelse show-energy?6 b8 o' V( a. s" A p* z; @/ P
[ set label energy ]
* r6 G. Z$ p; F4 m2 E [ set label "" ]2 C- K4 q/ N- D8 `" y4 Z
]7 }4 b! \* k& ^& A, ~2 {/ R
end. r$ D9 L: A, D' u( c. p
to reproduce: }) A! [/ a. e, I2 K5 E' `1 {
ask turtles [4 Y3 L, q5 d6 H( i
if energy > 50 [
+ I3 n1 x+ P1 B) G0 ^+ {* Z8 j set energy energy - 503 v, d. w9 e4 {! t% n9 F
hatch 1 [ set energy 50 ]
; i$ y* P* w& L; n0 i ]+ g+ `; h k& D8 `0 {4 ^8 y: E
]+ Z2 }/ n2 _( \8 P; ]6 Y5 x
end
+ n1 m8 o' |* t, f7 v" f8 eto check-death
3 m8 ?8 l D. V; f ask turtles [- B% t1 @* B9 @' E2 E
if energy <= 0 [ die ]4 m: X7 K- {- ?4 o$ J
]
3 s; j) r: G5 B: ^1 V( F- \end
9 E" q9 C9 p. `8 ^4 @) `to regrow-grass! @* \! u% f1 [ H$ c
ask patches [
- e& C, a& K, ]7 J if random 100 < 3 [ set pcolor green ]
5 U1 N( X4 j1 Y8 G# F2 n9 s ]
5 G- D! V/ z1 F: E& \/ lend
/ [. k# E# p* O, `to do-plots5 ^1 ^! |3 Q% k6 Q# g# z
set-current-plot "Totals"! |, ~' J5 c4 f1 ]0 |1 y1 Z
set-current-plot-pen "turtles"7 S- Z6 [" q4 S5 e ?! _
plot count turtles# Y2 C2 U) r" y6 \
set-current-plot-pen "grass"0 W4 |. o; \4 t: K8 I# \
plot count patches with [pcolor = green], i1 J, h2 B1 q2 e* \6 l
end
6 G6 v; d; B0 _' l% c9 l9 Y5 T可是运行时提示no such plot: "Totals"' f, R0 D, Q1 }9 Y3 W' m
error while observer running SET-CURRENT-PLOT
, t* `0 V0 d$ }: {, ?' E7 O$ g called by procedure DO-PLOTS: \+ q9 d# Z! V0 }! p
called by procedure SETUP
1 c1 N/ o+ |( T* g' M, Y called by 按钮 'setup'
& \$ j3 i4 t8 q8 n求大神解答啊 |