我编的程序如下turtles-own [energy]; _; k1 `/ Y4 Z/ C7 w6 S
to setup
[8 ~% \2 ^3 b$ w C clear-all5 w5 j% H% v; {3 q9 h
setup-patches
4 C$ @/ R. d) x create-turtles 100# p) C4 h0 I5 r$ b
do-plots# T7 \9 N! I- [
ask turtles [ setxy random-xcor random-ycor ]
. Q# x; Z6 j: s; J- m5 a+ @' Wend
9 n6 l- M1 B0 z) {to go- j/ _# W- `* p& H% s* `* G
move-turtles+ R; Y" I1 N" m
eat-grass2 C7 q* X" a; y* W f* f7 L; ~
reproduce
+ H% Y- Z7 h0 t* l J, \ check-death
5 [- n: J+ D6 K regrow-grass
. P& ^" m" s4 V4 ?& s do-plots* G0 M; C9 f, d$ F+ o0 h
end
. a5 ]. ^2 b8 |5 ~to move-turtles
4 ?; ~2 V1 [5 d: W ask turtles [8 y4 K! M. ^: Z$ ^5 b5 G
right random 360
) J# B% O: F% |; a forward 1
! Q7 B0 l( s0 U1 G set energy energy - 1; P' S+ w% p) Q
]: c/ Q9 Z5 {" ~& ?4 Q
end& N% x. r4 G p6 f( M: ]
to setup-patches
+ g6 o/ o- W% r* q* j3 [ ask patches [ set pcolor green ]
; q! h9 M& Y& Tend% f& j+ n9 ?5 e! j1 T7 C5 k
to setup-turtles, h8 u5 f+ |7 l" e% l# {6 F9 k
create-turtles 100+ M3 W% j# L/ W" M% M2 D8 F' e
ask turtles [ setxy random-xcor random-ycor ]* e: c& J5 M4 k1 }; ?
end9 J3 F$ C7 O( {" p- `, w
to eat-grass/ F- V, o" w5 N' w9 J) i
ask turtles [
& s6 H9 `$ G& O. Y' f, C4 g if pcolor = green [# b0 Z, f' n3 j' e) a: L1 ~4 r
set pcolor black
# [ N. r$ ~4 q7 T; I set energy (energy + 10)
4 d) A4 M5 V) k ]
- b. m( v4 W* M ifelse show-energy?0 ]/ @! u3 N4 a0 q9 l w* x
[ set label energy ]. h+ J7 y7 ~0 q6 J6 Y- A
[ set label "" ]% Y; a- J3 B4 e4 y9 Q
]5 p; \$ c5 Z" E) Y7 D6 T5 @
end
4 n0 W! t# J0 q; N/ Rto reproduce
7 D- B7 s R6 \$ F! o- t4 P/ O ask turtles [
8 b$ s& B* G* p8 @ if energy > 50 [
8 j3 ^% v; h3 C( Z# n/ W set energy energy - 50# ?& M2 U1 W3 q: i" z
hatch 1 [ set energy 50 ]: T+ w% R1 c" A
]
* O* q6 B4 y* T# Z2 Q. o/ Q' _ ]
: n: e5 \1 @. T+ Z! Q% N( _4 n, S% T9 wend
: u; n. Z9 y- S) V3 K2 _# `to check-death6 f) l2 f4 J9 z' u8 h, P( W6 R
ask turtles [! r% V; X) w. ~4 `4 a
if energy <= 0 [ die ]" Y, o# g8 v2 ^+ D" q
]
/ h9 _- N6 ~/ eend' R5 M8 y- y5 G4 S# H. O
to regrow-grass
7 r g& B! s6 K3 k ask patches [
n+ A d$ P0 @) K6 E5 [# A1 l if random 100 < 3 [ set pcolor green ]
2 z: X2 o) H9 |- O1 I3 V" u" a ]$ B/ U* h( {& D5 J) `! [; p% U$ b
end/ p) `5 j% n, N- @+ I8 E& E9 P
to do-plots
$ G3 j! w8 Y/ D3 Q set-current-plot "Totals"
; o( e$ w" @# B5 V set-current-plot-pen "turtles"
# \0 }8 X4 M2 T% c; N plot count turtles
3 x6 m; w' H' D8 h( ^# b set-current-plot-pen "grass"
; }, G( ]5 m- y5 j# S$ c plot count patches with [pcolor = green]
: S1 X* S& K) p7 z2 Rend
" L/ B" ]! m g% e( m1 I( F7 L可是运行时提示no such plot: "Totals"0 m n$ Y* k) K9 ~+ ? x( e. M
error while observer running SET-CURRENT-PLOT
/ g3 G* H" d; ~8 s$ A: I called by procedure DO-PLOTS
$ j; k! r/ B( f" a. l& z) @ called by procedure SETUP4 @! x. s, }9 J& c5 l$ K
called by 按钮 'setup'+ X& E5 E, f/ D& m" I0 H
求大神解答啊 |