我编的程序如下turtles-own [energy]1 ~8 P$ R2 n) `3 ^
to setup6 l$ ]/ v7 p7 a% J6 y
clear-all- `; W1 b; W& _7 o
setup-patches7 i8 L2 y3 r8 X1 k7 t4 E
create-turtles 100
2 y' a& R* c6 W9 W d, K* f7 w$ A do-plots
* Q9 u8 r: X# n ask turtles [ setxy random-xcor random-ycor ]0 G5 I( \/ {+ n0 {" ]5 H( C
end! G1 W/ r5 c7 K0 ^. W: j
to go% i: ^. o+ M- V2 x
move-turtles
$ o! J9 p: B, b u$ `" ` eat-grass$ J# d( O' H" }
reproduce
0 `1 C" v" k4 h3 Z check-death
* c d5 W$ ~, ]% o/ m0 ? regrow-grass3 P* j# m. }6 m# @* K
do-plots
9 o0 E- L7 ~0 H D- Tend4 K5 @2 @' Z5 N# _& `4 d3 z; U# f
to move-turtles5 |3 W8 U# ]2 q1 g& b: B
ask turtles [
* l% x7 O2 B- r5 | right random 360) {- n/ ?/ P* t( ~/ {
forward 1+ L4 W- p: I- E q: ?
set energy energy - 19 b5 i* m* i% u- T, Q l% L
]
, P% j% U3 {5 j! Jend; [# M: @* o, p) I
to setup-patches
, E7 k# R% T: U7 \% Y7 x/ n ask patches [ set pcolor green ]
% Z: B# M5 ]5 ?3 \; _8 @: Lend
& Q5 a! K0 R+ @: S1 pto setup-turtles
6 `4 a! F+ E9 j5 y g' t create-turtles 100
( V- M5 o; j# {- p ask turtles [ setxy random-xcor random-ycor ]
' @* M9 n* v' y9 x# cend) P% Z) L# \- q% Z
to eat-grass
]4 y ~; _! B+ A# R0 q( T ask turtles [
# @; s3 |3 X2 F" E: v if pcolor = green [
4 [. b( l1 C5 m" ]. ]) \ set pcolor black
/ J; j* \) u# r5 R8 J+ J2 f set energy (energy + 10)
: t& g8 K4 Q5 b. V5 b0 t4 f+ D ]# I# D/ G2 R+ C3 t2 c( {" u0 k# D
ifelse show-energy? Z/ q' u7 |2 [5 R3 s- L' V
[ set label energy ]
6 f+ W4 `# _/ s4 p" \# G9 g [ set label "" ]
: @/ P" _9 {$ N I9 l: x ]
) [( U' ^' S& ]0 B0 k* Iend i$ Y$ O& _ s) C7 V
to reproduce6 [6 Z7 `, B t0 e" f) |( T
ask turtles [& K* O- \& {" L2 @7 T w
if energy > 50 [
0 L$ p9 d) b: q* d0 a: [5 n- Y set energy energy - 50
" n" t; S2 G$ `# q hatch 1 [ set energy 50 ]
- V. P5 r% D* m- r& S" Q ], Y" J u) r. A5 }; P; Y/ Y. `
]
3 e/ r4 { x0 d Zend, m5 s# p% \& q% X5 J
to check-death& @; \, M2 j. R0 u+ S: t, j' y, _
ask turtles [
% ~/ A* ?3 b' Z' `- ?- h if energy <= 0 [ die ]
+ V4 A8 N; B, |$ r ]7 W! K; `! a8 v# ~; _3 _; S
end
8 {7 m2 f$ s3 @9 f: kto regrow-grass# ]$ f! }3 I) t+ |* F4 f/ M8 L
ask patches [% c+ a9 Z9 _2 w* R, ^0 P
if random 100 < 3 [ set pcolor green ]
! V* h. K5 y2 A; T; T- r ]# D9 o1 x) D' g) J& q4 ^
end
- J8 A( g) s# f: h$ ^/ W3 ^to do-plots
$ W' C1 d! X$ b F2 k set-current-plot "Totals"
9 z8 L) X6 X/ e+ C3 V set-current-plot-pen "turtles"6 F& I" k( Q0 M% _ o; |: b
plot count turtles9 j% r4 ^* x0 l e0 a
set-current-plot-pen "grass"1 }1 d! v- x3 s2 d3 [3 Q& ?+ e- } f
plot count patches with [pcolor = green]- e5 N: X7 y+ ]
end
: w8 ]! n$ y0 ]% Z6 W8 @/ L可是运行时提示no such plot: "Totals"/ ^ C" }2 q4 B$ x
error while observer running SET-CURRENT-PLOT
. b9 \ l* z$ C5 I called by procedure DO-PLOTS& `- k. x( W. b0 c
called by procedure SETUP
9 I) M( h/ _4 K" r3 O( P called by 按钮 'setup'
6 \+ L K% S& }- j0 ^ O求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
