我编的程序如下turtles-own [energy]
5 C" |8 c* c: dto setup4 N1 S+ T. N+ Z' i6 P1 h4 M( b
clear-all
! p6 w+ I5 t b K setup-patches
5 r2 r: v1 D% n' A2 J7 f create-turtles 100; Q: Q5 q. W# d. {. j; H( T1 k
do-plots+ b1 a/ m* b# g
ask turtles [ setxy random-xcor random-ycor ]/ f- O/ n& I7 \ }0 D" X1 N1 y
end( y# I2 Z' }! h/ @3 O
to go
9 X9 s1 @& A2 H; y. S move-turtles
0 r3 M c6 F* u [ eat-grass
0 y W F* K; X' k/ u7 M reproduce
$ m6 R" p9 `, P: K check-death: k5 s% ~$ q( V8 W6 X
regrow-grass
7 C9 r" t) l4 w3 ] j/ \ do-plots9 u- p$ b/ s+ i9 M, q! k' m. _
end" o. ^; v8 l+ Q7 @! e- p8 F" }
to move-turtles: ]- f, y$ B3 p) P
ask turtles [) p% ?2 l$ r1 L; | ~9 c
right random 360
9 P; O1 x0 \9 Q' J7 {$ f4 X" E* b$ I; u forward 1
1 ~$ L6 o4 E9 C2 ~ set energy energy - 13 Q# i( v! h2 Y! t2 B5 |5 a
]( [1 v- a0 k9 q& B
end9 m6 u3 S! d: R) o0 ?* A" R# Y
to setup-patches
! h- ]7 z- s2 w& ` ask patches [ set pcolor green ]
1 V' ?! l% i# |+ K! j7 o- |: Yend/ G$ d9 o& C! H1 V
to setup-turtles% a+ w% P( k; L2 ~
create-turtles 100
h+ N& M% `, p0 G/ X ask turtles [ setxy random-xcor random-ycor ]
+ n2 E5 F$ j! pend
! D' Q2 h( G1 zto eat-grass
4 f0 M9 U* M/ V1 I" B ask turtles [" r+ M# }( C8 s* [7 ~$ Z" }
if pcolor = green [
: C# j& s5 \; j# ~5 b5 c; e set pcolor black( |+ H! t5 b2 m& z: }" ~
set energy (energy + 10)
6 k; l/ a0 r: Y ]
4 r' O1 s$ F2 i ifelse show-energy?
4 } ^& i1 e( w. L1 S' O [ set label energy ]3 E& U! B8 i0 t' i V F% n
[ set label "" ]# c. v% D. I: ]. C* x Y
]
; B6 e, v4 S6 \+ z; Tend# i" K r& D T/ s
to reproduce% w# o# @; i9 o2 P: ?
ask turtles [
0 Z! r m9 r$ f. S if energy > 50 [
& ]# Q# g K: H4 l set energy energy - 50+ H+ p$ N: @8 Y+ F+ d
hatch 1 [ set energy 50 ]4 Z, e! d& }1 ]' j0 y4 F: i
]( ?7 t* Q" E2 m) o6 C- M
]. s% Z- x2 Z* z& b8 O. J9 U
end* {, }* P! d; O, j) O! O8 Q
to check-death
" k' c- J: U9 h# [1 K$ I" F ask turtles [$ C! y& L3 _0 z& e. @) W; Q
if energy <= 0 [ die ]/ T* g, y4 t9 h# o1 ?
]
! V& z0 `8 K2 mend
) ?8 H" r+ x( e: p4 v3 O$ e3 V+ r% y$ rto regrow-grass4 Z# K: k/ I+ G$ m1 k3 k; A$ l
ask patches [
5 J, z% @" v9 G; V8 v# j4 t7 ? if random 100 < 3 [ set pcolor green ]
5 S, j. f7 W. {" H0 Q' g* X5 T ]
3 l7 G1 ~4 D. `- I- b0 W* [ Uend+ X8 W ?/ h" }( p' I, f! Z
to do-plots
6 O7 J) a* {6 W set-current-plot "Totals"/ I) Z, S4 e8 F# _/ s# y7 A2 S# f1 u) l6 v
set-current-plot-pen "turtles"' b( q) o) v4 \* [4 n
plot count turtles; K7 u$ w8 K% I
set-current-plot-pen "grass". Q% e9 a; ?2 G* m3 G# ~
plot count patches with [pcolor = green]# }- M! Q4 `- E5 C3 x3 F
end
( ~+ O+ h1 [; u. D可是运行时提示no such plot: "Totals"
2 a" k& D1 K& R" Xerror while observer running SET-CURRENT-PLOT! p/ a) z! n1 [( `
called by procedure DO-PLOTS5 V8 b4 Z9 h8 \: \! f7 g, l. F5 S
called by procedure SETUP$ X3 O) a6 N* ]& o, e( [
called by 按钮 'setup'
8 g, r0 u/ y9 i7 b8 ]! U0 `: y, C求大神解答啊 |