我编的程序如下turtles-own [energy]1 j6 w3 i0 m# B. T4 E S
to setup( Q. U; {3 j# W7 h# q2 D1 ]( u
clear-all
* K$ t5 [9 \6 ]* \ setup-patches
( |1 V9 ]. [8 m0 r% C3 w; V create-turtles 100
8 {! H3 ~2 V- N do-plots
' b- X: a7 }% V7 }6 v6 o ask turtles [ setxy random-xcor random-ycor ]
/ ^0 l9 T7 j) { |end w4 n& _" Z0 o% F) G( S/ _6 q
to go! `! ]4 m1 c# s% Z
move-turtles+ m9 J1 q, B3 s* }+ S8 m
eat-grass
8 _% B9 l3 X) k% {: l reproduce
; }7 s: o, D, i; Z( b check-death$ d4 E D* n9 J7 k( B4 U
regrow-grass
$ ?$ p6 z& X0 h do-plots
+ C* I4 I' N) Iend
; B. F( O% A& G% e% P! t$ oto move-turtles
! ]1 @. N* E- b: Q. ] ask turtles [" l- \8 E' k$ T+ u) b
right random 360
3 T. }- k c( ~4 I/ Q1 ^ forward 1: B2 R7 l! }9 k" C
set energy energy - 1
& s- h! P$ R/ _! n" y5 W- ] ]5 _/ T: {. I C! I
end
8 i A' H/ u+ yto setup-patches
f" a- M: n0 Y& t# V ask patches [ set pcolor green ]
. B. ~- }# X; ]+ ^" ?. O5 d/ Yend
/ g/ G; q; o: R+ Ato setup-turtles, |, c+ O0 T* J- K, j3 K
create-turtles 100% T+ m) f2 [, q% [3 K1 R, @" @4 U
ask turtles [ setxy random-xcor random-ycor ]
. \5 w+ F t+ v7 E/ i, s0 Send- X4 p! l" C9 S2 L5 F
to eat-grass
; Q& v. J* R4 l$ { F ask turtles [0 r% [8 l/ C& B S9 U
if pcolor = green [3 n4 b& F) G4 U
set pcolor black2 z3 K% m- |9 y, P' y
set energy (energy + 10)
! a" }% b5 o5 j4 j7 K2 b9 {3 w ]- j& r$ _ J* a0 l
ifelse show-energy?/ e5 a/ \, O! d8 u# \& g, F. ?; I
[ set label energy ]/ K4 t& O% Y7 g
[ set label "" ]
5 p0 i" c( N" w+ K- ^4 k I ]
9 b* Y; l Z, a; d' E# I! j2 lend
; y* o A T9 ?2 A2 Qto reproduce2 g! U3 [" e: \% K8 k0 V
ask turtles [
( R& F- C8 b) u% A4 A: n if energy > 50 [$ [5 O* t \; P3 g2 F4 t- K
set energy energy - 50
8 r7 L2 l& H4 |2 Z: S; J hatch 1 [ set energy 50 ]
7 f) ]. H/ E1 E) S* M7 ~ ]! `& r/ N3 Q4 N% ~
]
) L1 g$ Z/ P8 @& aend+ v2 d+ u% v+ f! N( V5 w# j; X
to check-death' |+ w3 Z a+ a" k* Z
ask turtles [
/ W" o4 x: T1 Z6 |# ?2 e b if energy <= 0 [ die ]
% h; e% ^9 V" D1 A ]8 h" z+ F2 v2 H8 \$ j* _1 D
end- n/ u9 F. v' _, ~0 m* s
to regrow-grass
1 @" ?5 E+ Z( F5 j/ R2 H ask patches [" f; m) w& X$ T6 b1 q
if random 100 < 3 [ set pcolor green ], ~$ I5 I; Z3 Y& l
]- M' a. P6 R2 q5 M+ B
end( j5 p" Q: J; D0 I( v$ k
to do-plots, }. u, w0 N0 g/ b5 D
set-current-plot "Totals"
$ W5 E- o, f4 N' U set-current-plot-pen "turtles"
# L) |( l) x/ M0 ]. C plot count turtles$ l" }- \" R4 o `/ {' h
set-current-plot-pen "grass"
1 Y9 I0 L- g5 M+ V5 d plot count patches with [pcolor = green]7 G( d" u* s, U5 }% g x# T
end
; B) l( b1 w) A可是运行时提示no such plot: "Totals". c, V7 f3 U( P, ?$ U, O
error while observer running SET-CURRENT-PLOT
7 b! c* S- R- [: x+ H' z* h called by procedure DO-PLOTS2 b+ I: m" G3 k9 Y+ I
called by procedure SETUP' T+ t# \ o4 d/ B, r, f5 v
called by 按钮 'setup'0 y, B5 Y# o8 @* {4 c5 b0 ]) Y
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
