我编的程序如下turtles-own [energy]2 \+ L, g8 `; {
to setup0 o+ n" t# W" K8 m
clear-all
& l/ \7 Y6 G& h+ b I8 ^ setup-patches& M$ M2 W4 h! n+ |$ p
create-turtles 100
* \1 _6 w* A( q) i do-plots
3 b! q/ Y! ^1 y# p3 G0 w$ f1 @ ask turtles [ setxy random-xcor random-ycor ]
9 o* k7 E& v1 S2 fend7 o/ y/ F8 J6 A0 M+ k1 _
to go+ B- W1 x7 B6 X& r" p
move-turtles" r' q8 L+ d& `# h$ ~- I9 \
eat-grass
* `7 t' |0 H+ f o+ }7 h reproduce
% d. Q0 C: y5 S0 y check-death# w/ z0 N/ U5 Y$ ^
regrow-grass
- z" D3 _$ v, q, e# d( t3 B do-plots4 J; E6 B6 H( U3 E* w4 {* z$ c
end2 n) x* }$ b3 j* U
to move-turtles
! l; }6 `5 B/ H# k ask turtles [0 |" M& G! s1 I$ w" x8 k! D
right random 360; x. b7 l! N( N* K1 }8 m
forward 1
- p* s- H7 Y8 J1 n set energy energy - 1; N) e1 z6 G2 {; n5 O
]
" Y: X1 J- G% F$ E2 j! m1 ~% Q$ `end; z) v' L5 Y, R* h# p7 _
to setup-patches F/ Z( y- o: }# b7 z
ask patches [ set pcolor green ]: q1 V1 ?1 A! O- I
end' a% ~& y: H5 L/ \
to setup-turtles
) C: ~& ]9 S) K4 x+ }3 y: ` create-turtles 100$ v/ S$ y' |2 O' o) w' @
ask turtles [ setxy random-xcor random-ycor ]6 Q" p0 H8 f7 E
end
) _" u; {7 X4 a, [! w5 L' S zto eat-grass
4 K: I+ f, c8 G: F# y' X ask turtles [7 x* M- s8 s8 u% Q7 {4 E$ L
if pcolor = green [
& K+ T; W9 y5 x. d set pcolor black
8 `* r v u; Q) j- a" n set energy (energy + 10)
U/ F5 W) [, p1 T3 t/ h ]3 L, G _# q8 m) c" G( N
ifelse show-energy?* `: o# S$ _. V
[ set label energy ]
9 l8 a) `* P- Q" A [ set label "" ]
5 g& F$ Q+ d( F& A) v ]2 b* C1 I( ~2 p, U" t0 Q ]% @$ S
end
+ [" N$ _3 J7 p+ r. A* C+ J2 E1 _% Mto reproduce% C1 Z# ~& b5 q" t# s2 ]
ask turtles [
( t4 w0 S" u$ S- \8 I if energy > 50 [4 V+ a- U+ h7 l+ D& S
set energy energy - 50$ `2 t8 `. U7 Q
hatch 1 [ set energy 50 ]
5 A, V$ M) v! q1 ]; p/ [( z% L ]
' E! z+ w+ C' k9 a% v# [+ L, N ]- z4 r8 [4 ^! ^6 h$ X8 n
end
! Y( a' M F' i% L! N% c8 wto check-death
, S9 n+ p( U1 p: h$ T- d! ? ask turtles [
% f. O9 t- s* c8 y2 w if energy <= 0 [ die ]6 F) R2 }/ F( k4 A
]
6 O$ }1 r( E" b$ wend
" o( t, b) N$ wto regrow-grass: b0 J6 L0 t. Q* u% [
ask patches [
$ g1 j, ]7 ?6 I3 W" \' m if random 100 < 3 [ set pcolor green ]
: J; g/ U( @( J ]) [6 j* p7 \! R3 ~; ]$ b
end6 \! }( ^: B% Q( ]
to do-plots1 D' T7 }1 t) k" K
set-current-plot "Totals"- y% k y9 U. w0 V/ ~ o
set-current-plot-pen "turtles"4 z5 M% H7 l4 C$ o' V
plot count turtles
* ]0 |3 ?" w& D4 h4 D& H set-current-plot-pen "grass"2 y+ T9 p% V- c! o/ @/ q3 j
plot count patches with [pcolor = green]. u3 @0 y) O M# [: _
end
8 b! Q+ ?9 m% W* v$ g+ @* o可是运行时提示no such plot: "Totals". `$ S% U8 z/ H* x" `$ h6 s
error while observer running SET-CURRENT-PLOT
( T# w; }+ V3 p& d: ] called by procedure DO-PLOTS: C% c4 O, u8 f C- |3 z; [0 D7 z% o4 d
called by procedure SETUP, Z+ a4 P- q8 j% H* G2 ^, m* t
called by 按钮 'setup'% z" _: t. o! y0 ~: t! v7 A
求大神解答啊 |