我编的程序如下turtles-own [energy]7 C4 m8 ~& a7 C( V6 W
to setup( u4 y c/ h* L; T- ~) C" \: h
clear-all
" k+ U- j: t( ~/ p! K% _ setup-patches* ^$ ~+ ]0 x6 @( n$ v
create-turtles 100
0 K; Q! q$ P, H1 i2 x2 r9 x# g do-plots
! f, n2 e. U4 k$ Y+ A l ask turtles [ setxy random-xcor random-ycor ]$ i) F+ S) E' j
end
1 O6 F0 Y1 p; E6 n5 R2 p: g0 I, m0 N6 Eto go
4 i* U% E- |8 b move-turtles
! @) @* v* c+ L* W eat-grass
& P2 ]9 h' x R. E4 C( n reproduce* t5 V) Q E" K7 g! t
check-death: \2 u5 M* Y4 X2 ?) {& `
regrow-grass
; ^" B# l4 ]1 ]8 N7 g9 E4 W1 ` do-plots
. z0 y5 ?0 ~, cend
* s0 Y- Z( E: T: }# E/ z8 P6 gto move-turtles
3 v) O% [) }. P* N ask turtles [
/ j4 |& _. O6 }6 W! P+ r right random 360
2 r8 K: M9 ~ u8 o, T* ]- g forward 1
( o) j; `$ Y. W; V# n. ? set energy energy - 1
1 _$ t0 e" B8 y4 I* T ]1 X8 d' r* X# ]4 m$ y/ T. ?
end' q9 [/ Y0 \+ [2 h1 Q
to setup-patches0 \% |1 N, r& {1 i1 P$ k q
ask patches [ set pcolor green ]
' S8 S( U9 R4 R0 V5 ^2 j) Z6 gend7 C4 m' d" N( y, ]
to setup-turtles% a5 ?+ e/ N8 D0 F( D. n
create-turtles 100
( }) t' ~( W+ u6 l% o ask turtles [ setxy random-xcor random-ycor ]& N( O; M' v! X) P
end
6 G$ N9 u" g4 s" hto eat-grass
F+ D9 U; Q6 p+ Z ask turtles [
( U$ V6 ]: ~; S6 B, ~ if pcolor = green [
( v/ W6 R$ l2 a( I5 ]% k- l8 M% m set pcolor black/ L& b; y1 ]& ]+ V) Q
set energy (energy + 10)
- _. `* `' B8 w. Q9 u4 v+ i4 b ]
C* Y7 H4 @$ b1 r9 _# y& `9 F ifelse show-energy?& k. v* G# N* r
[ set label energy ]* Y( R/ |7 U& W7 t
[ set label "" ]# W( H* \! j6 t r$ F d
]( k+ @' v# x4 ]' Q
end
2 J1 t) F. n, W, Sto reproduce
! ]$ I3 l+ S7 [0 c ask turtles [
0 m }3 y D6 {% H% U3 q if energy > 50 [
9 `7 j0 ]% A% B, W' l" K set energy energy - 508 h' K4 |; p8 {3 ^3 e1 X0 r1 Y
hatch 1 [ set energy 50 ]3 Y9 ^ `! t0 M7 k, L. v* Z
]
( E3 d. J, z T1 i" @ ]3 j2 V! f3 Q( K6 T& u* r9 V
end
' k9 ]$ z' H9 q$ P1 xto check-death
# n, X) k" n0 r2 ^ ask turtles [8 H; ^1 h1 {8 F/ ?& W! C
if energy <= 0 [ die ]5 J' e/ M3 {+ D9 n
]
2 V( t/ n: \! Z8 c; k- _end% N' w- Q- i( \# B. ?8 g* x5 k6 O% }
to regrow-grass
7 e' |0 u; O' J9 a% M( f ask patches [
% B2 E4 J; u" J8 o, j9 J if random 100 < 3 [ set pcolor green ]
3 l2 j/ x6 {( Q& t0 V( k& o: s ]
& _. f# M" _: j c4 jend
3 F: v# D' \3 t$ ]* Lto do-plots
7 X1 x& d7 ?. _7 }3 } set-current-plot "Totals"
+ ]7 Q: F* b4 G) \ set-current-plot-pen "turtles"
, s" z+ N+ z# w1 D, y0 `: t3 ` plot count turtles
, i* v( ]( h5 E8 L+ G3 H$ s set-current-plot-pen "grass"
* a7 g. S; D( j: |7 W, l9 E( l3 k plot count patches with [pcolor = green]
! z5 m5 O0 A% Y9 n) |8 Fend
0 l# ~, N/ y' f. |可是运行时提示no such plot: "Totals"/ s, @7 p' T) k) M3 E
error while observer running SET-CURRENT-PLOT2 |( o; X7 H/ {9 S5 {
called by procedure DO-PLOTS
6 {* C) s* Q8 }$ J3 [! b called by procedure SETUP/ x# X1 E! c5 J J2 {
called by 按钮 'setup'$ r. V t" M, L. z }
求大神解答啊 |