我编的程序如下turtles-own [energy]1 [. E8 M3 P/ ?0 B3 W2 e; s# Z
to setup
. v# M @: w j" ~1 `* p8 S clear-all
7 n) [6 z" F0 j1 p5 q. \: V setup-patches
3 E* B( p. O4 x) Q create-turtles 100
7 v- X6 @; v+ O4 J& ?0 U) ` do-plots
6 x' n6 L; R' w# H3 ^" R$ S/ w( W! A ask turtles [ setxy random-xcor random-ycor ]1 p& T; C: ?" ~6 a
end
2 Y* A2 T" W2 C# ato go0 j% y3 d6 A& q1 \4 q
move-turtles/ ]; n) q6 n) E6 d% x# ?
eat-grass; F! D* N2 k6 ]" f- @0 j' h
reproduce
, J* z1 e, }, [8 F8 T+ W% A check-death4 {& d* K j& ~' ~" U4 x6 V
regrow-grass
1 D- c1 z7 T7 b- z" | do-plots
/ s2 ?2 C: c! M1 D; L5 C4 Aend
' @& f. P3 l4 K- L: }' t+ Fto move-turtles5 l+ A4 N' N0 B6 p o2 }
ask turtles [! ]5 R% k! U, i- r% v, L; _$ s
right random 360
" F% N2 F+ h2 n$ _4 D forward 1# h7 G7 ?/ I; m7 `+ A
set energy energy - 1
6 @- A% R- v' h$ K8 m# L# N ]4 k$ u, l' E" Z
end
' ~- T0 C+ b( t4 H {to setup-patches
" y, r3 S H& C. S0 R8 M ask patches [ set pcolor green ]1 E% e7 m& l. @: a
end4 r4 G* H9 D" D
to setup-turtles
8 H8 `# |: ^, l$ X- C create-turtles 100
2 T. I- c- ^" T/ p, j8 @: y ask turtles [ setxy random-xcor random-ycor ]% ?$ R5 b$ `8 E% v( H! ?; h
end
3 c* \& _" |" _* |% u6 M7 uto eat-grass
6 X8 I* P1 s$ H. z u. M" K3 e0 p5 | ask turtles [
( U* @' A" J( H' r if pcolor = green [: N% T6 p" i* X4 b6 [* X
set pcolor black5 Y! P4 g+ E/ Z7 i) _ u2 c" P8 O
set energy (energy + 10)$ f: `4 ]1 U, W6 j8 e2 A
]
+ ?# E4 w- q7 h ifelse show-energy?0 R7 b" d0 e7 s @+ w h
[ set label energy ]
: [, e- c8 N' j& l m [ set label "" ]
0 d: b/ k" O9 B# `8 |# S ]+ @. @ d0 s1 x2 ]" s. O1 |+ f
end( H; f5 `8 Z. G: @2 U1 \8 z
to reproduce9 t% n4 p' l) t/ D
ask turtles [$ X) n6 ?9 q3 S) H! j
if energy > 50 [
2 O$ O- ~9 d- t set energy energy - 50
/ m4 C( ?& F) Y9 U4 w hatch 1 [ set energy 50 ]' [1 X# e- F9 }
]
0 Q! V _" V* i S0 M2 U* W; p1 N ]5 W" x* i8 q1 H- o
end
8 ]1 T& z6 P% Uto check-death7 \0 q4 v9 { V2 U* n# y* p
ask turtles [
5 p: e) q- Z0 @! ^/ t' ?. d8 Y; o& C if energy <= 0 [ die ]3 {0 ~2 B- V# ^0 S0 A0 d
]/ {; k; Z! u5 I. ^' i* F
end/ l$ w) W% F* s' k; U. R/ G$ Z3 i
to regrow-grass
% ~! M0 F, Y" e+ S3 C' ` ask patches [& p9 `6 r* a$ B6 P4 o1 v
if random 100 < 3 [ set pcolor green ]
! d: Y, G: V, j6 ` F3 }( }$ I ]+ L7 }4 C) w" a% J
end$ u: }' U- E4 z* v. H8 q9 M
to do-plots q" z. ?! i. r; b
set-current-plot "Totals"
; p! O0 I1 `- C, ?4 S set-current-plot-pen "turtles"" ]+ L l$ X+ L3 G
plot count turtles1 V' ^" g9 G! [" @
set-current-plot-pen "grass"- [+ D" B: w# e
plot count patches with [pcolor = green]3 p1 T t0 b' \4 f9 [
end" O9 _. O& A t0 L: z
可是运行时提示no such plot: "Totals"2 k5 i7 U2 n4 b; y
error while observer running SET-CURRENT-PLOT
3 I6 r: M7 F+ h7 q/ [ called by procedure DO-PLOTS
) Z( P: e+ J5 u5 a2 R) n called by procedure SETUP) y# Z1 o0 {/ X
called by 按钮 'setup'
0 k8 E) y& }, W7 O" U" R求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
