我编的程序如下turtles-own [energy]( l- g7 l1 q, G; \
to setup9 u3 \2 K) Y. |- S* R" L7 @+ H& c
clear-all
3 t. }4 s# |& R' F; ^7 }; I setup-patches
/ `6 F- G7 C6 \! y2 d/ w create-turtles 1004 e) A2 d1 C. x& `
do-plots
G- X9 z; t0 e2 c& e# d ask turtles [ setxy random-xcor random-ycor ]3 L% E, ]$ \9 e N, I% I+ [
end! K8 Z( B. q& ?, F/ ^
to go0 t+ {, Q# k7 R( J; j
move-turtles& b& z. O: D& }1 y" n6 ~$ z- }, B
eat-grass
: f+ B5 V/ I( O reproduce$ A* [8 ?, ?0 Z* L+ f4 a! I
check-death
0 H6 s3 n9 u) U5 } regrow-grass
8 A# r. O3 M% [ do-plots
* ^& q' u6 V( t$ g+ a4 y, lend
: K& |! f; o6 ]0 Pto move-turtles' T- i: B- M- s
ask turtles [% ^5 U* D/ L2 n
right random 3604 X1 p' u. z* _. Y; x2 [
forward 1
! R2 H K* l6 s" M1 t set energy energy - 1
: W8 }8 W* R4 j6 g* [ ]
9 k2 P& A- z$ [( t2 c% B/ x9 l$ zend
6 a2 E2 h9 P" e# b% y/ z- X7 ?7 ?( gto setup-patches
$ ~' \# C+ z u" ?% [' i ask patches [ set pcolor green ]+ c: l l( N' ^$ E% T( ?
end+ d6 L+ o) C4 y+ r( |9 V
to setup-turtles$ T4 h# h T3 X! i' l" z
create-turtles 100
& V- @7 \3 p7 ^0 S ask turtles [ setxy random-xcor random-ycor ]& v! p: A( n+ Z$ f
end- g5 s5 Q9 j1 \! ]
to eat-grass
1 m7 A' `+ I' R1 b ask turtles [
+ `$ h9 I+ g) A. B$ |3 G7 Q6 K if pcolor = green [ Y2 o: ~& \) Q9 W) T& V4 o" n" v
set pcolor black0 f2 a N. p7 X/ f" c! q
set energy (energy + 10)
" K1 I" G5 ?) O/ i ]7 s$ ?6 s9 _; h0 c
ifelse show-energy?
* b/ V: [; O0 g+ U; _ [ set label energy ]$ ~( f! \, D- b! I$ O. \1 B
[ set label "" ]
+ F; ~5 a% F6 t+ o ]5 W" Q9 b3 M7 y
end
0 M5 J1 v" b5 u$ ito reproduce
: C) n% R" x2 o% w) U ask turtles [
) d5 l k4 n0 M: ~! T5 v7 s if energy > 50 [6 C: ], V* \- s/ g7 ?1 y9 e/ X
set energy energy - 502 s7 u# Z7 {* M5 ~
hatch 1 [ set energy 50 ]6 @ O9 b1 }# r! v! K
]
7 b2 u+ m. x Y6 v; z" f9 X2 _ ]5 K3 G! w" Z* r1 G& S
end8 k5 n( i' v1 r
to check-death# Y. X, }- Y0 v- M: q" z' p9 t) u! t
ask turtles [0 v2 O) f2 q6 s: v0 }6 G0 E
if energy <= 0 [ die ]
8 H5 K2 _5 e! [ ]! t( s X7 m0 ?# V* D, i
end
) i, P* c' g- |( ` X% qto regrow-grass- p$ \: e% \! j7 _& e0 d m N
ask patches [5 `& r0 O2 d: j2 P8 k. u: i5 E
if random 100 < 3 [ set pcolor green ]' W4 j/ ]1 G9 x/ K; P$ F
]
# B- r" t; c( m5 tend
- i: N1 Z" c) gto do-plots
: r( c/ o5 e7 f* g9 a, g set-current-plot "Totals"2 ?6 A5 `9 g! h# d/ H+ W5 S, r
set-current-plot-pen "turtles"
" n* Z# T6 D9 x plot count turtles
& {" G0 h8 h1 _0 }. j set-current-plot-pen "grass"
/ Z% N; S0 T1 t, E plot count patches with [pcolor = green]
8 @& P/ P* K" v* Jend
% R- a0 r/ X5 L8 ^+ j; i0 Z可是运行时提示no such plot: "Totals"
* T1 H9 M, D2 i5 t, c Eerror while observer running SET-CURRENT-PLOT h A4 _$ ]% a& X& G3 Y' q
called by procedure DO-PLOTS6 D+ i: l$ a' E( l
called by procedure SETUP9 h6 C+ U5 j) T3 G" A1 t( E
called by 按钮 'setup'
/ T$ j3 c2 o' d1 ?: P; N求大神解答啊 |