我编的程序如下turtles-own [energy]! O/ M& R% Z, G9 @. `/ ]
to setup
?" X. G5 g( |* }, J! C clear-all
& J: z/ ^* q8 {2 E& }9 } setup-patches) D2 k( U, t* w% {
create-turtles 1003 y) A0 s m3 }0 k0 p8 j. ?
do-plots
, @& {6 ?' B) g- K ask turtles [ setxy random-xcor random-ycor ]/ r' g' R: H) G
end
& H3 `" [: E# I+ S; W$ |* vto go
6 l) R; q7 @! L* h; H move-turtles
1 S& h: T: U$ D4 z' e7 U% N& b eat-grass) d8 X( _2 c2 d/ ~7 [' I( n
reproduce0 m0 H8 U0 r, }
check-death: J# g7 |& M5 A+ [$ X9 @. h
regrow-grass
. w d3 F$ C) m5 J do-plots
/ z& G# o: P- @6 ]4 eend i4 \- ^$ p5 B$ m$ ?+ k
to move-turtles
* l9 N+ m7 }/ P# P ask turtles [
1 u* A! V7 Q! r$ r" [ right random 3606 j9 {( s+ d' J1 e: j: E9 v
forward 10 Y5 M+ F0 J6 a. W
set energy energy - 1
) r* S6 M( f A ]/ O" o: R' i4 k+ B5 M
end" S' d8 P4 S, D+ G% U
to setup-patches* g3 I+ V+ _5 |6 j. Q$ s8 o
ask patches [ set pcolor green ]
- B5 j1 Y8 U# a$ Rend
" Z4 E6 a! b3 X. Uto setup-turtles
0 O5 ]+ p* B" C, R create-turtles 100% H1 F/ A5 ]$ }, T8 h; v
ask turtles [ setxy random-xcor random-ycor ]
( ] r$ y3 [8 Q( Gend
) V! ]0 ^; |; L* U6 I- hto eat-grass6 Z' Y$ @ v2 t
ask turtles [
" |2 o6 j" f" k) G& E7 ` if pcolor = green [
h6 |4 l- ]3 w" N, p* }3 I set pcolor black s5 a- O$ V! A% j' m" x
set energy (energy + 10)+ b; `5 n0 q, G; P0 Q* V( [
]+ i4 ]8 t' G: q' T, [
ifelse show-energy?5 q3 Q- ~$ z5 U# n7 X6 t
[ set label energy ]: S: t/ |( v: s# h% L8 q6 [
[ set label "" ]6 P& O3 u3 { o! b
]
7 K7 }9 _! o2 J" s; v7 j9 i$ Qend. X) A. j( t! x/ N$ }* x3 Z7 r" o
to reproduce
4 I2 t9 A% D7 n1 ?/ E0 d ask turtles [* J! C- e" i# c
if energy > 50 [
: b. k \% Q2 l; N set energy energy - 50
2 C+ W- V7 m4 k* [0 I' ? hatch 1 [ set energy 50 ]/ c" s- X0 x" N& d& X
]. Y0 D- l3 ?6 R* z& F- w/ |
]: B8 O, t+ ?( O3 ~% D/ j: U
end
6 I- {. ^8 k* d. mto check-death
. a# z, Y1 ?- e0 { ask turtles [+ w$ g- q6 ~: p' l: ~
if energy <= 0 [ die ]& N0 ]) U) j7 {: }
]0 W" S# z' a$ X/ n0 ^# u k
end! N" R" B" X$ @& h; |; t6 a! z2 V
to regrow-grass
! q: S! h( g1 Q ask patches [
3 Y3 Q7 X$ @2 a3 O+ M8 n if random 100 < 3 [ set pcolor green ]) Y+ N' Z! O$ Y5 Q8 C
]
8 c, `* Y8 V' P. n" i4 i3 oend% @* c9 r7 n2 T( X. u6 @/ a
to do-plots: R, ~. u h2 `( z. N: \# @# ^8 p8 N
set-current-plot "Totals") I) F" m7 r) O3 A0 F% H: l0 h* r
set-current-plot-pen "turtles"" _% \- @( I! a1 c8 e
plot count turtles# V* Y- T( }" P& ~
set-current-plot-pen "grass"2 }; d' g+ K+ ], p3 ]* ]1 Z
plot count patches with [pcolor = green]3 e5 x# T1 f- `1 V @, k- B, g
end
3 s9 @* U( [5 W6 g3 L3 x3 X可是运行时提示no such plot: "Totals"
M( Q( E" q( serror while observer running SET-CURRENT-PLOT5 T0 r2 U+ x7 [* q: ?$ ]0 Y
called by procedure DO-PLOTS( L' s' f1 M) X8 V! i& [" Z' v
called by procedure SETUP
8 ^( t/ I5 y2 M6 C5 z. b; } called by 按钮 'setup'
7 H8 l( |! q+ ]) [+ V求大神解答啊 |