我编的程序如下turtles-own [energy]
4 l p" K/ } mto setup
4 d2 Q, ~) x2 B* A; m N, T1 P clear-all q, @: y$ W2 C7 G- O' L1 x
setup-patches
K; G+ X+ G; {3 I, i" W create-turtles 100
( y# U0 o' C3 X: n; h* G% ] do-plots' y9 y/ v! U% Z' D+ }* i3 U
ask turtles [ setxy random-xcor random-ycor ]
$ S) a8 L. g+ Yend- V) n6 B) Z5 C
to go
0 y/ ]: S5 O: z0 D2 ^9 [6 N2 } move-turtles& V8 d& `; z, Z% c7 n
eat-grass% w; Y5 [" N4 ?! ]+ v2 W
reproduce
1 W5 c5 c' [: w9 k) g4 [: t' | check-death( L& [- S. J. i1 d
regrow-grass9 `4 l( p$ f* }! |/ n
do-plots
+ x/ f4 o- P: Y3 R5 h7 j9 |) Tend' u6 \3 Z9 \! }! J3 U( E' F M
to move-turtles ]: d5 _) ?- v! `( @+ b
ask turtles [3 T2 y9 U& V# m% C
right random 360
! C, {! d2 f: C m3 I1 H+ r# X forward 1
M* O( A' `; _$ C: x2 _9 f; U3 \ set energy energy - 1
0 x( c: H% ]! O4 J w ]7 E; ~/ e( z: J0 m/ y8 e" [* P+ P
end* I% l4 I- X1 Y7 `3 n
to setup-patches
' m% M" d( ~1 [) e( w ask patches [ set pcolor green ]6 n3 S: e1 X r d- H6 N' s2 g2 |
end
- W* p* W3 j0 W0 x) R' z! h' Vto setup-turtles
! W4 Z) K7 c6 P create-turtles 1005 o; @0 B( `* h% p
ask turtles [ setxy random-xcor random-ycor ]; E1 ^7 ~' F) R
end, g7 {- K$ I' j% o' }0 M4 c
to eat-grass! Q. g% ?6 R' T
ask turtles [. L) M$ A6 t! x* [" \$ R
if pcolor = green [6 n2 ~- D: ^# k' z7 ^+ L. ?" i
set pcolor black
) O5 I% ^3 [0 p6 Z: |5 ^7 O set energy (energy + 10)
1 C, b P5 x5 G" F0 \2 E* d ]
, H! W* \. y+ S, d1 n% F( |5 r3 x ifelse show-energy?% A5 P' ]9 p3 z/ L( S
[ set label energy ]
" f$ x" h3 N4 V+ I+ X$ j# J [ set label "" ]
" S( g1 B$ V7 A5 F7 S$ R+ ` ]
7 O" n3 O3 A" n4 h7 e. z" `end) L8 r2 a8 D8 o- K0 s
to reproduce6 Z+ b8 j$ W6 M# \4 G; E
ask turtles [$ S) L( h* `+ S0 X, t# T( i
if energy > 50 [
) ?/ _. f( G4 @/ }" o set energy energy - 50( v7 }$ f2 x) x7 d' Q2 W
hatch 1 [ set energy 50 ]
+ ?& E" L" ?7 i8 s2 L ]
! ^# P6 K T7 R ]8 d1 C# H' [" M" z9 z6 b, v
end- G8 g/ P7 t- K- a$ j6 o& B
to check-death
5 C* I; {' R6 k d6 s' T) b ask turtles [% J, U- @' K* R9 D5 O
if energy <= 0 [ die ]
1 r1 Y* d% v+ h; g6 e E6 ^: N ]& E& F5 B$ P( d* H) l
end
+ S) _6 {5 B1 Ato regrow-grass
+ l- h8 Q# O: @* U8 q# X ask patches [
% ~$ ]1 _' ]. f3 s' p- H1 v if random 100 < 3 [ set pcolor green ]
: M: B' l0 v5 Y& t- m ]
4 I, k2 w0 S: D) o* i0 i$ p% Bend8 E% U. M; o$ C: p k7 y( R
to do-plots
. ?) D; P" M) ~! A set-current-plot "Totals"% w) L$ b. r% K0 O
set-current-plot-pen "turtles"& D- |+ h) L' W i- r" `. y' d
plot count turtles8 v- `3 ^) g; c
set-current-plot-pen "grass"3 o( x( \4 U) l, d, u# \1 Y& T, ]
plot count patches with [pcolor = green]! Q# M5 J5 G9 s5 @& N6 f( p1 w' h
end' O# M) P% }8 r2 d% S
可是运行时提示no such plot: "Totals" ^: i. | x0 G0 f
error while observer running SET-CURRENT-PLOT3 v z9 ]7 R7 G8 q# m) ?
called by procedure DO-PLOTS
' E4 x; D" j7 l; w# s7 X# t) T. X1 A called by procedure SETUP: R0 @$ g& b# |2 F* W: t1 `+ ^1 q
called by 按钮 'setup'
! V$ n e' }* `. k: Q3 {求大神解答啊 |