我编的程序如下turtles-own [energy]
5 C& m' s' p3 u, N# q }) uto setup
' p# c1 F) q# S3 p( q; O9 l clear-all
; e; e( x% _, B3 A setup-patches
& a" b: J" K+ ~- f$ [" a create-turtles 100
, M7 O" e D: e3 Y0 a# {; N; x do-plots
, q9 ]1 c+ [# v5 |( N* i& V, p) l ask turtles [ setxy random-xcor random-ycor ]: l# Y* [* v+ @' T! [
end; |* d# b5 `1 K* m8 x
to go
6 A/ n* J8 X5 [( J* d move-turtles
9 U u1 a# q* r" j; M* I4 k eat-grass6 `4 f |3 U' `5 y. d2 x
reproduce7 b/ j d1 M# `2 c
check-death. V* d( |! H- o* L" u/ C6 {4 j% [
regrow-grass& p' @ d8 T# N4 P7 K4 v) B
do-plots3 x& C$ S8 V7 j5 P
end
/ p; b7 c/ g0 Y9 \ x9 Qto move-turtles
3 g4 V9 ?9 @9 N) ` ask turtles [
) t! N" ^( j' `8 A( m* H: R right random 360
5 H) o$ m9 `6 U2 t forward 1
% s+ H2 n7 Q) x* X3 v' ^! B set energy energy - 1
/ U3 @# y# j, e P4 S- C% h( b ]
3 v, q. ^3 B* U. Uend- a, j2 W: d6 ?, n
to setup-patches
9 S- @- l6 O/ H ~ ask patches [ set pcolor green ]
! j3 F0 ?& T- `0 c, _end
% A! i( p& ]8 U; Q; Wto setup-turtles
k/ P( F; }7 F# o' ~ c/ I9 _ create-turtles 100
* a$ m- T& |0 p0 A; b: \; [9 p2 o ask turtles [ setxy random-xcor random-ycor ]
8 d! C3 ?& r1 F/ H6 I6 s7 iend9 P, |1 X4 N) D' Q7 ^# ^
to eat-grass, L! y- }- n) ?( k( G
ask turtles [8 M3 B( q1 m+ N: `
if pcolor = green [' g1 ~# I1 E0 J& ` ~6 U' S" u+ r' o3 g
set pcolor black
# B3 ?/ R% B& c/ P2 L& X7 X( c set energy (energy + 10)/ Y" a- N, }! y M3 h3 j- z
]% _4 M. r8 p! D7 M9 |
ifelse show-energy?
) n! [4 p& W+ A; h! s [ set label energy ]
6 Y& e. _. k; b8 {7 q [ set label "" ]- w1 B. g4 f6 v) a; U
]- b2 g+ `4 x, X' F
end0 j- a1 O" n! c$ S- F! X; g
to reproduce
4 q$ }- Y$ A. c+ S9 c' m# h ask turtles [
$ c0 r B: ?' }) `. n if energy > 50 [7 f$ A# h/ I, L4 d; C
set energy energy - 50 M; ]6 F/ v0 B
hatch 1 [ set energy 50 ]6 a6 ~7 R8 o' A
]
4 c- X' |: V* {7 N* d ]) X' [. M; N. q5 ?: w" O# E4 C
end( |' ^/ b3 @! s' F1 q) g/ m
to check-death9 ^5 a E Q+ Z: h7 Q
ask turtles [3 ^& Y! M6 i+ ?
if energy <= 0 [ die ]
# `/ s6 G5 Q+ o9 }( ^ ]
- K i- P( V- H' q' n/ v2 i3 Xend
4 W! n! D5 y4 c% kto regrow-grass
& L3 g* P" ?1 l9 C, D ask patches [ e5 D/ H7 i5 E/ N3 r" v
if random 100 < 3 [ set pcolor green ]
; A& z5 X" ~$ n: B. ? ]+ ?2 I3 Y: |2 b. y1 O3 p- C6 |: \
end
9 Q8 S! N! `( u% D0 Hto do-plots; j/ A, D" c% {% E. N2 c' B
set-current-plot "Totals"
: q3 ^" W$ p% ~5 b set-current-plot-pen "turtles"
; {& \2 X" j4 j5 T' G plot count turtles8 j- q9 e" S. g7 [/ `1 C" e
set-current-plot-pen "grass"4 n0 Y1 |! W! @$ e. i' T
plot count patches with [pcolor = green]3 b) C6 ~* b8 H8 O7 J
end* C7 c9 E5 a# A5 J% {
可是运行时提示no such plot: "Totals"
$ i8 \' F- {3 P3 O, z/ m! M6 H `error while observer running SET-CURRENT-PLOT
" [+ Y; [) `2 j- J called by procedure DO-PLOTS3 Q' m u- z7 q' U" t+ n8 l: j- t
called by procedure SETUP( i3 W, v2 [4 P4 a+ B& g _
called by 按钮 'setup': W: n% b3 O9 F/ b% C2 D9 J5 E
求大神解答啊 |