我编的程序如下turtles-own [energy]7 E+ x/ H" q/ D { g/ @
to setup9 n7 T( C* f7 r9 B: a: Y. [3 q. K
clear-all8 ^' a% f) r" H0 F- g6 b4 f8 W
setup-patches3 h+ Q' H1 ^2 u% [
create-turtles 1000 T; E+ Z7 a" j- ^, {
do-plots
1 b9 @1 D& }" b! \5 t! i. R+ k$ V ask turtles [ setxy random-xcor random-ycor ]0 r7 p) d8 j4 O$ ?/ Z* K! f2 [" m
end
; w8 e4 z H3 T# ~5 D) ^1 Vto go
& h a5 S7 |+ b4 H move-turtles
6 A+ _, b7 R; C( X* R6 ^' e eat-grass
* d6 s3 V# M' a$ B6 \% F reproduce
+ d' X1 t- X: c! m" Z check-death7 L7 Q2 o% Q. [. } a
regrow-grass' W" v: {% `% L; m! }3 d$ `& n) U/ M
do-plots
( D5 \3 W8 B$ U3 nend
; ?! S$ }5 s) O' a% N" t, D8 A) {, nto move-turtles! K# V% ]! |0 q7 z
ask turtles [- n3 x- u9 A1 w
right random 360# e$ c; _ s. E3 c$ T- K
forward 1
$ {- _+ @1 f- e/ `* A set energy energy - 15 H1 n, G" p& k* H/ S1 U8 M
]; C' Z, Y: Y- r3 M- L5 F3 f
end
4 e$ O V: N1 [. w5 D) ~to setup-patches
+ { e* T$ s- m6 i* J0 ~ ask patches [ set pcolor green ]
: d3 \. H# r! O9 ` uend
- }2 P2 J5 x/ I( ito setup-turtles: w& v) l8 z9 V" g) V+ o
create-turtles 1007 r& u6 p. ~' A7 |
ask turtles [ setxy random-xcor random-ycor ] p# t5 D* n7 \+ p7 g! \
end4 T" @9 s5 z6 W& i1 t6 t' k$ Z3 J
to eat-grass' z$ V2 `2 x m- A: w9 D( @
ask turtles [7 ^ R: R( u" s
if pcolor = green [2 U6 J& }8 a! v# }
set pcolor black
+ M9 }+ Z; {' Q6 a set energy (energy + 10)# n" [* S2 M x/ p( q. C
]
8 B2 A4 j/ w. @% _$ F; r! l ifelse show-energy?
0 y% D5 Q' W+ d/ E9 @. w4 ~7 } [ set label energy ]
& y8 }, Z8 H' x [ set label "" ]: X& k' g$ g) I4 e r: |! ?2 ~: T
]* `: d/ }4 r8 y0 k" X7 \% n
end
& u. D P9 {% ~- k- ito reproduce+ N9 w, `# R5 L. k9 z/ ^
ask turtles [
6 O3 l8 G, e! ?+ I/ m if energy > 50 [
+ N0 W/ W$ T$ }4 @7 [/ A( b% ^ set energy energy - 508 ~2 _0 }# K) O$ d4 ]
hatch 1 [ set energy 50 ]
8 w# |. z$ k" W9 O ]
/ J1 s$ j& g6 E- g6 n( q5 k3 w! ^0 _# @ ]* ^2 i5 a* c t
end$ V! z. a: ?. N: e
to check-death
/ `+ F2 Y8 d0 @4 N ask turtles [
( m: j, l8 O q, P m S- q% K if energy <= 0 [ die ]
: |5 i5 g& a+ _/ S ]
3 W& U5 g0 f0 Z6 ^7 ~, @end) F9 n# ]% ?8 c( P* Q$ Y/ S E0 r2 t
to regrow-grass
, \* {! H1 T4 o6 }# M ask patches [
% e! S- j" L% v7 _" J4 \- t x if random 100 < 3 [ set pcolor green ]
6 D* g8 j7 j- ?8 O ]
/ o8 r5 p9 Y. M0 Nend" t# p l1 w4 e5 c+ o5 p3 Q# v! Q
to do-plots
$ r9 E9 Q. c+ n/ J* d+ x% z8 q set-current-plot "Totals"4 O [1 I! m' i0 t& P; n9 I
set-current-plot-pen "turtles". O( D/ u \, z/ E1 _7 o
plot count turtles; N- |5 N; _ L' z* K
set-current-plot-pen "grass": i3 B0 P @% E, d4 {% I* S
plot count patches with [pcolor = green]
! R0 ~( W' @; r: p vend
+ F. g$ e) d' V l# c可是运行时提示no such plot: "Totals": x& G4 n/ H3 U8 [; v
error while observer running SET-CURRENT-PLOT3 B4 ?' v1 L5 G4 h; `* R; B
called by procedure DO-PLOTS( E' I5 g; I$ l4 _1 h: l. q! ^0 d7 P
called by procedure SETUP; A7 z0 p$ s+ Y& F3 s
called by 按钮 'setup'
& `0 [" r- N: H( G8 K求大神解答啊 |