我编的程序如下turtles-own [energy]
0 S0 t- G: Q- o5 d' t' Y" |- nto setup
4 B; e; H0 C5 ^ clear-all% a1 `) \: U0 [1 q3 N& y! b
setup-patches) z1 r! w/ ?# e7 z$ f
create-turtles 100
+ L+ {4 m0 O% E& J" s" j do-plots2 r7 t1 E. @' @7 c" H' U% @$ s
ask turtles [ setxy random-xcor random-ycor ]4 L! h/ |7 M: n; p0 x" Z
end
( r7 d7 u5 ?, g5 Fto go
: L' v* ^; l, C+ i# |) ~' P move-turtles) h3 M5 G- }$ g) [8 ]8 o0 c# w
eat-grass# c6 j0 d. \1 g5 U+ a! U
reproduce
0 X) Y S& u. k! i check-death" v/ W' v9 N- U; M; J
regrow-grass1 q0 P1 w8 T; t8 z
do-plots
6 J U3 Q% a* {9 @8 M E/ d0 aend
+ B- a4 T% s$ r- ~7 N/ Fto move-turtles
6 m' A; L- P9 J ask turtles [" H3 u6 | E8 b
right random 360
4 `, T) ~* s" i' _8 x( D forward 1/ J- x n0 a/ d, {
set energy energy - 1
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end! U8 [# C) v- ^
to setup-patches5 i: l% j: h5 @$ n" _4 N' B) X
ask patches [ set pcolor green ]& {9 |: U& L$ V6 y2 N" n# l1 Y8 Y! z
end, i. g7 K/ V3 J6 l
to setup-turtles
$ c) {% O0 C, ]6 X! m9 i create-turtles 100
( q6 p& m4 P8 }8 { L. ^ ask turtles [ setxy random-xcor random-ycor ]
7 q2 [8 g7 _5 A( oend
7 _) }& [7 }! V: |" G* n6 w6 k$ Oto eat-grass. g) ]; n0 J2 O- z' g4 ~! G0 N
ask turtles [0 }- i' I/ f" \9 |. `( ?1 |
if pcolor = green [6 [4 y* S: j9 [/ o- u
set pcolor black
/ `6 w& O" q/ A% n% i8 ~6 N4 u set energy (energy + 10)
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ifelse show-energy?5 [7 N1 @ I5 n( P
[ set label energy ]
2 V K8 n% _2 v [ set label "" ]
# J2 T1 j9 ^; }8 | ]
/ y$ j% c9 o. `# y. j) }( u1 |end+ s8 h6 l( {* x" m* W
to reproduce3 h$ e2 k: o- I5 L! Z! ~7 R
ask turtles [
* h. H: R) z# f8 l# m if energy > 50 [) _9 V; Z. O# y4 T4 g+ M
set energy energy - 502 b6 h- H) @' \& G$ j, [& \, U
hatch 1 [ set energy 50 ]8 Z5 D3 u& ]; o: B
]: t. b. H+ q ~$ [& z& D$ F
], K$ K2 |+ h0 v
end
$ s: P% [, J. h) C qto check-death4 l; x$ H* {. g$ |2 `5 H
ask turtles [7 `3 ?$ y( H6 z2 W1 ^
if energy <= 0 [ die ]8 v% Z: G" h7 ]/ D) F
]
, j0 R4 l& v( b1 O" Zend. E/ {* u: e, }( a
to regrow-grass1 Z+ L$ c& z: k0 X( F7 K4 g/ N
ask patches [& N/ y: j6 P$ N& P6 x
if random 100 < 3 [ set pcolor green ]0 r( M7 d! H" s3 m2 `$ F3 B+ f) ~
]+ F" a0 n# y& X& i4 n s
end( a, p. ?6 n4 j1 T2 k* j) O
to do-plots7 b* Z/ r4 H1 C; j: i' x; h+ w
set-current-plot "Totals"' ]) a# Q1 }1 \4 ]$ V* I* p
set-current-plot-pen "turtles"4 H' b- c+ t+ P5 E7 H; N
plot count turtles
# }3 }2 p2 x; R! T+ d set-current-plot-pen "grass"1 c1 b8 @# m+ z) g! Q+ n0 |
plot count patches with [pcolor = green]" b) K5 m5 b& K3 ]* ?2 c
end
( t* e4 T. ]% U& V w, o) @% A可是运行时提示no such plot: "Totals"
. Q! f' e ]" u/ f- I0 ?6 o. {error while observer running SET-CURRENT-PLOT
7 Q+ u9 W4 k1 G: u! q. K9 F called by procedure DO-PLOTS
4 T0 Y4 A# l% d7 f called by procedure SETUP
" o9 C, V, U2 ~+ A called by 按钮 'setup'" ]" O6 ?6 u% }
求大神解答啊 |