我编的程序如下turtles-own [energy]. n h1 r% r, R. [5 e, m
to setup
) O/ \+ H. U, A' o& R clear-all- _0 C: C* S8 h; e" X
setup-patches7 W4 X* G# V8 I# L4 i
create-turtles 100
" ~' ~+ o: H* S! f) _6 t9 S$ i do-plots
/ l3 h( j. b2 H6 R: v ask turtles [ setxy random-xcor random-ycor ]
$ q7 L8 S' O7 m. t H( J, s+ _/ zend, A/ i; q6 e$ k$ t; r* P2 X& j
to go
5 w6 _& b( B! Z. A move-turtles' k k- w' B( d& ]7 x: A( U
eat-grass$ B; e k4 E7 ^( b3 P/ h/ X: [ v
reproduce& d$ z5 d5 \0 s5 `0 s
check-death, ]8 Q4 @7 D/ ~7 R$ h& q
regrow-grass1 T4 F+ r' ~4 `. L* g
do-plots3 a7 U* Y% E( c& J
end
' w; k% i& {" z; T) qto move-turtles
, y/ `8 y& n6 l ask turtles [
6 @ e8 h: Z6 l( ?$ c, g+ s9 u right random 3609 O5 `" C8 D q' i/ |) G3 U: h
forward 1
; d# m9 ^3 O" t- ^2 y; X: p set energy energy - 1
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end
9 i: I3 [) k! @5 oto setup-patches2 L3 }0 ?5 t7 l0 i- L- n4 g# y
ask patches [ set pcolor green ]8 Y( c7 W( w5 V+ t! D
end
* e$ I- l& E4 {; Y$ x4 n' q/ f" _to setup-turtles& n1 ~5 J, y9 X6 S) k
create-turtles 100' B- O2 [9 E. k1 l' R) o' D9 w
ask turtles [ setxy random-xcor random-ycor ]
9 o$ A' p7 a! _* wend
3 G0 p/ Q- \6 b! t& gto eat-grass1 O5 {3 U+ r( ^/ ]/ ^
ask turtles [( Z+ T, f/ I% G# {5 }" N7 L) o8 S
if pcolor = green [
' I( e$ n. J# N' C% _! S8 N/ | set pcolor black
% [# |! J2 c. U M' Z- x# N set energy (energy + 10)
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ifelse show-energy?+ J8 \1 T' G% n! J' |7 }
[ set label energy ]
( I6 z& k6 K* ~/ `# a X3 w' ? [ set label "" ]$ l1 r0 [' J3 J% t$ R' G+ g/ \
]) R4 }3 @- Q8 J6 o! l
end, Q" ~) D& R: A' s
to reproduce1 T7 A9 i1 u$ g1 d% @0 r8 }& [
ask turtles [5 a, i% g7 s; ]; U
if energy > 50 [; i2 k& Z+ z' A; t; H
set energy energy - 50/ Z/ E3 N9 b9 N" u( B" i
hatch 1 [ set energy 50 ]
* a9 q, t3 g, H# ? ]
7 S4 v2 j) t% j3 }8 N+ E ]
+ u$ y' Q2 |% D/ e" [# a9 p3 Uend
- T& @# ^4 g; a5 M1 Ato check-death
/ G5 Y. G( `1 s5 Z/ b. T; `3 Z6 }9 D ask turtles [$ D p8 J. t6 G7 w8 T
if energy <= 0 [ die ]
% C) C+ M. K8 u1 ` ]
1 G. W% w4 H& F! \6 rend7 i% |& J# f- A" O5 K3 P
to regrow-grass$ N/ q E* V- D* H+ Q |
ask patches [
) x( B. i$ q/ N( h; r if random 100 < 3 [ set pcolor green ]7 C* H: P' l+ s, W& a
]2 p+ h: q8 w- j- X6 m0 M
end) f. L2 {2 z |- @( d3 f3 p
to do-plots
/ U, {/ ^/ i1 Y; O8 L* W set-current-plot "Totals"
* ]8 l& g; n" F$ G- X( x set-current-plot-pen "turtles"
, T; m% [* i9 {+ x& n5 v plot count turtles
3 s! G7 l' b+ M" f% o set-current-plot-pen "grass"
( f, {: V0 |1 t plot count patches with [pcolor = green]
- N/ L9 @- b0 a9 `6 l* Kend
' ~7 t5 M. Z3 _可是运行时提示no such plot: "Totals", E& i) e" x# a* Y
error while observer running SET-CURRENT-PLOT' o5 ^+ o2 }5 W
called by procedure DO-PLOTS
_2 l7 o/ W* t N( `6 K called by procedure SETUP- A) M' T( d8 F, _1 G* M
called by 按钮 'setup'
6 _ X: J v. [5 f1 @' H6 b" p求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
