我编的程序如下turtles-own [energy]
& _* n! f8 q4 D( n, O& c% r& s4 c+ S% ato setup; u' b+ V6 ~) E0 U5 x6 Q+ s$ ]# t
clear-all0 m9 b' v6 f% L0 [9 F
setup-patches% h5 P# _/ Z* D+ |, \5 M
create-turtles 100$ H, u" d1 K, k+ R
do-plots- j9 h4 n5 @* j0 b% D# ?& Q8 j1 Q
ask turtles [ setxy random-xcor random-ycor ]
8 M- }4 k+ k; X. Q s: _3 S& Z3 iend: a+ }* o* U- j( c3 [) ~7 p
to go
2 \3 z' x" n, T1 ^! O move-turtles8 R9 L* v& C4 I/ Q( P& {* v
eat-grass5 U+ S9 }6 d9 {" v F
reproduce" n" \. S D4 D! U. }
check-death0 J4 c5 R# [0 j; m2 E, K: N+ y; g
regrow-grass- w& c% A) u) b% J
do-plots
7 u. y- o3 ~8 u2 p( |: \end
1 L$ }' `! h) T0 q$ N4 [. wto move-turtles
- j6 a8 t1 R& w ask turtles [
6 m* t L) i4 ? right random 360
8 d' U3 X+ E& ~ forward 1
+ _9 Y2 S) U2 F# j set energy energy - 1
7 W# H+ R1 W, f3 r, N ]) y2 d% M) d! p8 K" s2 E5 @
end
* w4 M" a" N* Y# k% N* m7 bto setup-patches1 ~! B9 h, f, z# }4 l
ask patches [ set pcolor green ]
, ^" f: Y) o# zend3 _6 q/ S: v( ?4 l8 ?: ]+ _( |% M
to setup-turtles
$ }: L( d9 r0 _ H7 Z create-turtles 100
) a3 p8 N) r% i B! B- n { ask turtles [ setxy random-xcor random-ycor ]% a5 B+ e9 q. R2 D6 T# x
end% a e/ n' k9 ~$ Y# |
to eat-grass
2 @+ b/ {% K8 `2 m6 @& P ask turtles [
- f5 Q$ {8 \. U. U' z' z5 L if pcolor = green [5 Z+ D: u) B: f, L& W
set pcolor black& o' W! d9 i+ E& F
set energy (energy + 10)$ ]' k ~1 e Q( n* F
]
! M( R( ?7 m$ T; ]- v: ]) b8 q ifelse show-energy?0 e$ P a5 b- K4 \8 |5 ^9 S7 H
[ set label energy ]: L5 R/ K# z6 S9 a2 @% ]
[ set label "" ]
! z6 b O9 K- f4 Z" _" { ]
; J/ _* f; w, _. t( l* Y9 g l: n6 c: ^end& b: l( n. G: a F% U: a
to reproduce
1 l6 R& ^" y) f ask turtles [1 {7 v* _ I! n$ I6 A
if energy > 50 [- ~2 u/ c+ w/ j
set energy energy - 50
8 L7 A; }/ V! W' W a hatch 1 [ set energy 50 ]
3 ~* M ~+ i9 E" F6 N, m ] c: H2 s, _0 _: O" S: w- p2 r
]
4 Z0 ~- c2 D+ b8 t& Z, yend
$ M2 k+ D" p/ F: x# w! ^$ _' kto check-death5 s- R$ Q( H' x- M5 j( @! z1 V) s# ^
ask turtles [
8 A! ^0 G5 x& J& e! G. ~ if energy <= 0 [ die ]9 k/ m! c- ?; S8 c1 V
]
0 _6 }7 i9 G* ?+ |end! b4 Z0 X4 v! _7 Y
to regrow-grass+ @% k& l8 J0 x% S
ask patches [8 \& p7 u+ R, i& \$ k- P
if random 100 < 3 [ set pcolor green ]
; u" r k" y9 ] ]
4 l) | }, O* p% h, f% fend: z, X0 I2 Q7 i
to do-plots
( K6 M, K4 w9 X$ F6 n set-current-plot "Totals", j* B$ L) Y9 K% o- |9 Z
set-current-plot-pen "turtles": a; N8 _( t3 B7 \5 s- p/ j' `
plot count turtles
: Q: X* E. o# f1 J! @ set-current-plot-pen "grass"
+ k: m% K1 N. G! I, R0 Y plot count patches with [pcolor = green] t0 g6 V4 `3 I
end% A* X' R4 O( C2 a; s, z' m x8 }; ~
可是运行时提示no such plot: "Totals"
* V% u/ K: B; Q% D* e1 B% {error while observer running SET-CURRENT-PLOT5 I) ?0 a) _0 M; s+ W4 g1 [' X
called by procedure DO-PLOTS/ E; p( [* `0 l+ j# U& Q( R
called by procedure SETUP
! u3 v" w6 D# ]" s7 j called by 按钮 'setup'
' R4 R4 x2 S$ D, a9 L' C0 a: U求大神解答啊 |