我编的程序如下turtles-own [energy]% [ f& l4 Q" A
to setup8 t8 H7 m) \. `7 d4 v7 q- c; T8 K
clear-all& ?* f G; e, p
setup-patches
' o) I/ A7 T9 w" a0 J# s0 ~( u N* P create-turtles 100; u& g: q, H; O( E* _
do-plots
' Z/ C& K* y1 ]' u8 z ask turtles [ setxy random-xcor random-ycor ]1 E$ D3 `' a* k9 }7 e/ M, W7 a. P
end' C% M9 h" d* G9 q" @# \! v
to go6 H3 o& j: |7 |: B S, `
move-turtles! ^% H2 R' X1 y% |- h
eat-grass9 r# ^2 ~) e3 U. o+ u! {2 ~7 V
reproduce! U( j5 ?- J5 t/ Y) E2 K
check-death
( g( D5 E1 k5 I8 [; v- S. C regrow-grass
1 _. w& V1 q$ F6 u1 G do-plots) h$ l/ m% J" I( N: w8 j# H
end
8 p+ [+ I1 S" }6 F% Cto move-turtles
7 S$ D, m2 m7 v3 P4 ] ask turtles [, j+ c2 |' M! {6 ]6 F
right random 360
@ U0 P8 U# m1 n1 W0 {" t6 P forward 1$ }, Q. Y' {$ ^0 q. N6 p8 R5 R4 R% ~
set energy energy - 1
8 P* A" W7 _# A1 f5 d4 r" E( c4 m) ^ ]
4 \, Q* j4 X" \6 T6 ?$ S2 r+ [end
$ Y5 ]5 S8 `- U. ^% vto setup-patches
1 v8 |/ q" R& u$ o& ~ ask patches [ set pcolor green ]
& M1 ]5 f" t/ k1 t7 i) ~6 gend3 M! _- Y1 }* r/ V; \( Z" t( m
to setup-turtles9 X; i0 n2 q5 z% r1 n
create-turtles 100
) z# q: [8 B# t8 c ask turtles [ setxy random-xcor random-ycor ]. U$ d: v* @% t1 g) h, a% l
end# b1 h* G% w* q
to eat-grass6 x2 e$ n5 F8 Y
ask turtles [) x* f7 X& w1 r+ u5 k
if pcolor = green [( \7 r# F' [$ c* h4 |
set pcolor black6 K% N" d% \; E% Y+ E3 F7 z6 |
set energy (energy + 10)9 `, x2 j" A1 { q
]
8 r& n% Q1 E% [ ifelse show-energy?
i1 D/ ]$ W; ~4 K5 C; R; m& i9 V+ Z [ set label energy ]" E- W4 b, \. s, ]
[ set label "" ]
7 [% a6 p0 F9 Y+ U, } ]
3 {3 ~7 t' r2 }% v7 Q7 [7 n3 U* nend
: n: V& n- P! F3 r& L6 _9 \to reproduce+ o/ `7 E7 X$ m0 v
ask turtles [
! }* s/ t# m% d0 J7 b- z9 Q if energy > 50 [
+ _) C* p6 ^ h9 i- z set energy energy - 50
4 x# k9 i) I0 y) X, P4 c/ N hatch 1 [ set energy 50 ]8 U" M9 m. {% b3 \7 O' A3 N6 S
]6 u% R1 W6 v$ D- C; ^. Y# m) I
]# f- c* C0 i7 L) J; Z8 L1 b- }& v
end
7 f x( D8 |- c. a! o4 \to check-death A: E0 A! B6 O; X1 ~
ask turtles [
; o+ N. R- M9 C if energy <= 0 [ die ]! V* x7 k: W" G+ O
]
5 h3 \" D# p% h5 E2 B0 d- bend1 \) M9 _+ }: n" R
to regrow-grass. d0 \0 C% h0 j& A6 i. D2 L
ask patches [
3 X7 Z8 Z" c3 R7 a. S5 Q% \3 E if random 100 < 3 [ set pcolor green ]' L" q5 u+ N/ q- v
]
' g, [. b1 d, u- g; O7 R( ]end
) N6 d0 I* A1 u5 c: E& z2 K9 f2 L9 o, ?to do-plots+ I) e5 A' b. a# `5 a+ {, P1 I
set-current-plot "Totals"6 ?' [1 \1 _0 f% J( F# A x
set-current-plot-pen "turtles"
2 B, R2 d6 N0 P5 H* U/ l plot count turtles3 S$ \# B$ C9 v, _* }. p' d
set-current-plot-pen "grass"
l: @3 b$ k2 p plot count patches with [pcolor = green]
" d$ s9 I8 _3 B/ |7 I3 [( ]end
* H; l# s4 E; c+ {; D: v( N* I# h可是运行时提示no such plot: "Totals"2 n! S' p4 M: ^3 U8 ]3 d
error while observer running SET-CURRENT-PLOT0 c2 u* H8 J3 ~1 J
called by procedure DO-PLOTS" v1 |! T2 ]/ l" p% \+ Q
called by procedure SETUP0 w! R1 d# l0 r2 R1 h
called by 按钮 'setup'+ D* Q8 S9 X2 l% k8 R1 [" l
求大神解答啊 |