我编的程序如下turtles-own [energy]2 p6 N5 x0 ]2 p( s& V# J4 y, f
to setup
! `5 C9 f3 S4 T% E clear-all
5 Q8 W, a! y, T( f3 b setup-patches$ ]0 ? i/ O/ z) X$ [7 O0 e9 ~
create-turtles 1001 X4 V( L9 j3 _4 p+ s* Z0 _
do-plots; |, ]# E( w$ I
ask turtles [ setxy random-xcor random-ycor ]$ z, c" c) d% c0 @0 ~
end
& C8 `, G/ f, ~" _to go6 k: [) G+ v3 P7 w- Z
move-turtles% R0 e* r: A6 R5 W
eat-grass2 B5 J3 I' n7 j
reproduce
8 P9 n6 c, ~9 g check-death
& d6 z$ O* J% s5 L$ G regrow-grass( s9 c! U& G3 K3 ]& L7 w
do-plots
2 H; V- ~4 I! W; A0 }9 z9 `end
1 ^0 l$ d# _% b2 z- [to move-turtles
# Z) Y, V: |% o6 S8 ~ ask turtles [% Z& R2 H0 e% E( o( ?1 i, h* y' F$ \
right random 360
/ V' M. \3 v( X1 Y& m( I forward 1
Q: p8 Z& p7 h' h/ i9 i5 o1 b set energy energy - 1 Z2 H. T/ e% \6 W! e( }
]6 R1 q) i3 D. ?/ s
end" D! C9 ?1 B3 z: |
to setup-patches1 J( X" ~* {% M; X# `1 W7 G
ask patches [ set pcolor green ]
9 e0 l- e8 _0 V8 M$ kend
, G& I2 f7 u7 Q/ x) Cto setup-turtles3 q' G" n% s4 I7 J" P
create-turtles 1006 z' P b/ ^5 k( y% C V' U
ask turtles [ setxy random-xcor random-ycor ]+ H! r! W; g- l7 _) w
end9 }3 S7 E& l1 F8 H
to eat-grass
7 ^- B, U! w) m6 N! q ask turtles [9 r* [8 f3 A7 |0 L3 ?+ h
if pcolor = green [9 B! c9 [0 }* q; n- k6 i8 j1 c/ J) q
set pcolor black
9 K* ^. l& [. c" u# p set energy (energy + 10)
9 D! U% J8 j6 q ]
4 v! `4 r. b. I0 E* p, D* S" v ifelse show-energy?
2 x) ~8 k- S, c) `; p! w [ set label energy ]
3 S/ y) c+ J$ ] [ set label "" ]! d5 F0 n1 x% d& w4 o3 x+ ^
]1 f: {" ?/ @$ ] ^. o: \
end8 a9 R2 {6 {: t4 m2 J# n1 ^# Z
to reproduce
3 s# Z9 s3 k( V, L& ] ask turtles [8 L2 S; n. F. A- v! G, B
if energy > 50 [7 j" a. }- V- A3 j) b8 c
set energy energy - 509 q$ L% M+ D& S4 t2 Q- t, |
hatch 1 [ set energy 50 ]
; D4 H O1 t5 _* j ]' h8 n: S. A; l0 E [5 V
]* K* i: u' q Y6 s' e( O8 `
end
) K7 ^, K* e" U( W4 ato check-death
% u0 {# ]/ Q; e- P- |2 u! l! R. p; s- F ask turtles [
) }( q! k5 E+ g; s9 Z7 b if energy <= 0 [ die ]# m7 n$ @1 b9 B f/ {. m1 k7 M5 q
]
# @) P1 a0 {( [ K A. z6 \end
; L4 U# s% f' z+ B8 P3 O3 T4 J# Nto regrow-grass
1 T2 |+ {, Q5 M, u4 W+ {# d ask patches [
; E3 Q; ?- N' D8 Y/ m if random 100 < 3 [ set pcolor green ]
2 A6 q% M+ R, q% k ]( ^/ x/ @2 A# J* L, {$ ~( X8 z( B
end
- P! b) w3 {2 y; U$ rto do-plots/ G; O4 `: W/ ^
set-current-plot "Totals") {6 _4 V, l# \' ^
set-current-plot-pen "turtles"
8 ~) S" y. l. p7 n+ B plot count turtles3 |! y2 `1 c2 t! W
set-current-plot-pen "grass"
6 Y) F0 l0 a# _% r plot count patches with [pcolor = green]
! V( X3 s0 i4 q! n: z$ v+ fend
1 _ V& m0 u/ ?2 Y8 M$ R# B b. j可是运行时提示no such plot: "Totals"
( B1 \1 S7 O$ k% f5 R' D0 b0 ierror while observer running SET-CURRENT-PLOT
, {( y7 |$ ?7 m9 T9 G+ U called by procedure DO-PLOTS4 Y- I/ y6 Z" v
called by procedure SETUP/ X& \2 l! p$ w" f7 M
called by 按钮 'setup'
7 B- g7 S% j/ v4 ]+ N8 g求大神解答啊 |