我编的程序如下turtles-own [energy]% _! Q$ j2 C3 ], s: X B" f
to setup! o2 L$ }* _7 {
clear-all
; t5 d% d1 D7 w5 h7 z* M1 f. a setup-patches# r" O; @! k' W" ?! l
create-turtles 1001 ]& B2 R% U# t0 \# `5 T* T$ U6 {
do-plots
W6 B; X3 t7 Y3 ^9 p/ X' | ask turtles [ setxy random-xcor random-ycor ]
& {3 f; P& x) \end! |9 z* N' w- E. l
to go
, s" g% b, T$ C) V" r" X move-turtles+ L/ B: l: i9 e4 O( L* [) I/ V
eat-grass( t3 i+ R4 G" ?; ]. U! t/ y( Q' @ O
reproduce
6 v* r1 w2 P- M6 t* \ check-death
4 H) e1 _8 c7 d4 X regrow-grass
# M' J& u; H1 [0 { do-plots
9 j2 \1 `* @4 \# r/ Q. I3 nend5 V% l2 l/ D, l* Y+ u+ f
to move-turtles' Q& C- K" X, Z2 O" R8 V' t& W2 \
ask turtles [0 G! Q) ]' y. ^$ R$ D8 R6 {: m3 ~% j M1 ]
right random 360
' b, P) P% ^9 p! G7 f% c forward 1
" W8 T" s1 H) B: Z* E set energy energy - 1
: R' |3 A" u$ P& q( w. ~2 ^' U+ x+ h6 t ]
) c9 L" ~; r' v" }end
) T1 H. ^6 u9 l, n8 @# {to setup-patches- z$ P/ ]6 b' R5 [: i) j7 ]5 q* }
ask patches [ set pcolor green ]
( U, @7 @# _- N- yend. j6 O. C4 W. J A
to setup-turtles
4 {6 _5 j' e) M* o3 P/ p. z" ? create-turtles 1004 m/ }- H8 w- n! J6 r
ask turtles [ setxy random-xcor random-ycor ]
( t1 n3 ?+ ?) |& k Xend
2 j9 {+ h9 f1 y+ s- x( bto eat-grass( k. q4 Y1 ?! E
ask turtles [! M+ R* Q/ i) s k9 z3 ^
if pcolor = green [
. O u# N8 R' \3 k set pcolor black
2 E! o2 I; S( f4 m7 p set energy (energy + 10)
- N4 Y# Y# F/ _3 g4 n; g ]
7 R$ V9 d4 @* C/ h7 F7 b ifelse show-energy?# B9 s( V+ ?1 N
[ set label energy ]6 j# {2 d* c! }# N
[ set label "" ]
8 Y) H4 ~4 J. Q: z* v- T, f9 r3 u( b. W ]
0 ? Y E! t* [: O2 s' ~end
0 a, f# h k* H& Z/ }' zto reproduce
0 c8 s0 A' ?9 _" K, k' I8 e8 O }7 { ask turtles [
5 g) {* p0 H7 V3 E if energy > 50 [9 K- Z/ ~1 t1 }; U2 q
set energy energy - 50
3 s' e0 d" c. a# b) K# Q hatch 1 [ set energy 50 ]! W J9 J0 L( x
]/ U( K: I% D4 w# M/ C9 y
]8 I5 U% u! y& o: S5 i/ f, ~ b
end
: d5 V& ]' j$ y# Wto check-death _' z! ` C0 F$ t2 s
ask turtles [0 L: y1 P; I3 V- I; R' ?
if energy <= 0 [ die ]5 s0 G. R# S$ l6 \ T8 e
]$ ^5 l f- D3 s8 b- r- z9 n( c
end
8 x' g3 w5 l$ K# Rto regrow-grass5 H) O9 g3 `" K3 y
ask patches [
8 ?4 g8 Y+ a' q7 u6 i8 x2 V if random 100 < 3 [ set pcolor green ] d2 S# ~/ z/ w( d3 Y5 c' d* S. T/ J5 F' e
]
. q$ u4 k7 ^% R7 {1 C- l. z$ I( Yend
w7 ]& d1 M Z9 x6 Mto do-plots' O; |; A. L4 M e7 W
set-current-plot "Totals"% y) I/ D* W0 S5 X2 e
set-current-plot-pen "turtles"
+ } q' w9 [3 @. x6 u% z$ k plot count turtles
$ b i' u, ?- R& X( B set-current-plot-pen "grass"
2 ?; P! e* ]% [4 P' U/ Q$ K6 n plot count patches with [pcolor = green]
u, N- z0 x8 a. f, C5 dend
& m/ x) T6 g4 G可是运行时提示no such plot: "Totals"
% {! M- M- S! L3 E. |) p9 v/ [7 O8 Herror while observer running SET-CURRENT-PLOT
" T+ t8 B+ _1 D! U1 s called by procedure DO-PLOTS
: ?2 F) Y2 b" y" A5 O0 C* F called by procedure SETUP' s* F) X8 Q. r
called by 按钮 'setup'$ n5 t# v( N. Q9 ^2 W
求大神解答啊 |