我编的程序如下turtles-own [energy]1 G" D( g2 {3 O) X: i' X0 A9 G
to setup0 L6 V4 ^3 @2 k
clear-all/ D) b2 O3 @8 ?' h
setup-patches
0 E6 J6 T x* k% c! D create-turtles 100% R* p8 }9 Y! K9 k* U8 D
do-plots; n* Q2 H( R: f3 Y
ask turtles [ setxy random-xcor random-ycor ]2 T& d# m( X7 A2 R
end
/ U2 h; `! x6 Z' cto go3 d9 h9 P3 Y. P P7 ?. A
move-turtles J" T6 h8 d) T3 U+ Q
eat-grass% }4 X3 ^# d( u- Q" ]
reproduce4 p5 ?, ?/ a$ Q( S5 l
check-death
3 s% E" A7 Z n+ j$ c regrow-grass
9 V$ e# H5 K, [) V* H" u" M7 ~4 r7 m do-plots
. T5 x) L8 e* @/ o7 B- W6 A: w& send
! z4 ]1 y5 x" \4 g+ p- ?to move-turtles
4 B& `4 }! M! a M# G ask turtles [
% e% W4 J7 @: h5 ~ right random 3606 E; u9 T" g' ~ C( Y( z; W- B$ g
forward 1
2 K! \4 C8 U7 E, ~& U3 f set energy energy - 1
) _3 F F8 v8 g1 c+ d1 @4 i/ s9 y ]
9 E0 j8 d) ?8 b' q3 x0 m7 Eend
- L" v# P% d6 s& X9 q* _; Pto setup-patches$ h" c: d* y. [ Z8 k
ask patches [ set pcolor green ]
; |: K- {/ c1 o9 }end5 o! x' X" ?) t, w* T
to setup-turtles
1 P% y4 [: ~2 Q create-turtles 100
7 _# L5 M. E5 v2 \2 t ask turtles [ setxy random-xcor random-ycor ]- ~# h) I6 j3 i- [% l; k8 [
end
0 t- {' I1 ]# t% vto eat-grass' _; \3 j, O. ~ j; Q: _7 p3 K
ask turtles [
# a. b+ L. Z6 F7 U if pcolor = green [
4 p; B7 n/ v; A* w* T& v2 B1 ` set pcolor black* i( ] B& t; d# p( K s0 h, m
set energy (energy + 10)
7 S* }3 m# W( R$ } ]- ~- e$ g! C9 r) ]7 \
ifelse show-energy?
. i8 G: J7 K( T$ Q [ set label energy ]
- P" d0 j/ k! {! X0 z5 m/ N- j [ set label "" ]3 P, a+ e( l0 s9 \" Y
]6 f7 A/ s& M" u H0 [$ p; i5 M
end$ N! R3 N7 @' s$ Q" S: J
to reproduce
/ T U6 _; `$ N/ @4 p( H( h ask turtles [3 u5 E9 A. @) L# j
if energy > 50 [3 u- [1 K7 ]% @. s% ]
set energy energy - 50
0 W3 T$ n" Z) L' s% B hatch 1 [ set energy 50 ]& y0 {- c+ P# T' m6 n; a! Z' e
]& X" I# B9 O0 O/ h
]
0 i1 }% j4 I3 S% d1 jend
0 C2 J6 `8 o/ N; ?) g" Oto check-death
" ^# ^9 D- m. O% i5 H ask turtles [$ G1 x; G8 Q* O* P, O7 k7 b& e$ G7 F. u9 n
if energy <= 0 [ die ]: P8 }2 \8 L3 g7 F. G9 d
]% w$ o( C$ [5 y
end
6 F% @3 j/ @+ M3 o w# b/ F( ^to regrow-grass
4 _; V/ ]/ r) f/ I+ V ask patches [0 t1 H3 s) m: e- M: E p0 @/ F
if random 100 < 3 [ set pcolor green ]7 B) i2 W5 N( C; a. D' l. B
]
2 m! d+ J( X. c1 aend( p4 A# k& Z) p1 \
to do-plots
, m7 X4 t3 r! ~: j& R set-current-plot "Totals"# M, N2 z9 J( C$ z
set-current-plot-pen "turtles"3 `/ a0 d6 M+ d$ o4 O$ D
plot count turtles7 V: j$ P4 y: j8 a
set-current-plot-pen "grass"
% w, u+ T$ ?% E- ` ^# K7 ` plot count patches with [pcolor = green]
; a7 S" F7 r/ c/ C& n; r& i n jend
r5 i* H, p# V2 }可是运行时提示no such plot: "Totals"$ Y- \; b: ^4 s9 R
error while observer running SET-CURRENT-PLOT: x- }# p* T3 g. ]/ {
called by procedure DO-PLOTS. P: p% @. N. A' L2 Q$ L* I4 P& k
called by procedure SETUP& F y& ]+ }3 w/ o1 y
called by 按钮 'setup'" `8 r* j, S0 O' j; d
求大神解答啊 |