我编的程序如下turtles-own [energy]
$ z1 Z/ r8 I6 U; C$ |% Y0 k1 J. Eto setup5 D4 ~: M2 r3 N# R3 o
clear-all
% i9 B9 {5 p) S" v/ P3 J+ X9 V setup-patches
' o$ a2 G1 h! Z, _7 o. B create-turtles 100
* K' T- r0 T' O do-plots" z) |( V$ y3 H
ask turtles [ setxy random-xcor random-ycor ]- c6 m ~/ b% k/ U' w( X/ I) |
end
: O- A, z! N3 I8 f+ U; yto go
% h8 H& K" e% j, x. p! N$ J6 s- I3 u; d move-turtles$ E6 D6 J' F: F! O& w6 A+ _
eat-grass
8 J5 k; h3 Y7 b3 v reproduce* c, A( q: B1 }: w
check-death
" X7 d$ R1 `! O regrow-grass
; q& j& j" D* _" `. J D3 Q1 Y5 J do-plots+ f: I9 b# E8 w) }
end
) v: Z7 |) Y c' h) t4 zto move-turtles
: ~# r. Q# C) z ask turtles [0 v3 {% p9 M' F. v r2 t$ c7 \' k8 [8 D
right random 360
. C2 ^3 u5 T) D0 e- x) f) |: ?" |' } forward 14 Z# i, C0 o& c X, \
set energy energy - 17 Q# p J F( ?1 g; ~
]+ x9 b1 n- j: v& G6 A7 {, F9 D
end* G6 S* z# b! s2 j g
to setup-patches
# B" Y" L7 [( p+ n! W ask patches [ set pcolor green ]
+ _9 X3 ]" a1 Q( Iend
* E% S3 ~% N0 I& j6 X& fto setup-turtles
/ E7 O/ b/ R p# {5 F6 ^ create-turtles 1006 I: A3 f" w3 F% f+ i
ask turtles [ setxy random-xcor random-ycor ]# ]) z* r' d6 j9 W& F* l; C2 K
end3 u" ~; ^- B) m+ T, v" q
to eat-grass
; t! C) p. g" R+ A: R- s ask turtles [/ E$ H) ?5 k, I8 ^
if pcolor = green [
4 u/ ~" `1 |/ ?1 R2 D0 r set pcolor black
2 W' f9 U0 |% e% p4 a( @2 J: U1 x8 ~ set energy (energy + 10)' e) r. e/ W' k5 j7 e6 S1 o
]
+ W( ^/ a/ y6 w ifelse show-energy?
, _; g( Q* l, `, U7 e( c+ G [ set label energy ]( S* k: ~2 b, K9 x3 s6 C
[ set label "" ]
% J# S* c: D# K6 c: N ], R3 D& K2 q4 Q/ t/ P1 X
end
) x6 e. S( ?4 z1 [9 x2 Yto reproduce
2 n7 l2 p# R4 P9 O! n ask turtles [" ^% e' E- T4 {1 d
if energy > 50 [
, r2 a8 \2 ~& |/ d3 ~ set energy energy - 50
6 E. {) x2 C& p/ l6 n" l hatch 1 [ set energy 50 ]
' L+ ^4 n# o9 U0 R r/ I, Z& { ]
3 U- ^1 K' Y$ s5 @! h* y" m0 U3 z ]+ w0 F6 a; Y. e0 }% B2 I1 b4 P6 j! L6 K
end
9 m9 `, S( n1 B! f1 R% Y3 u4 p4 Oto check-death: x6 r* k' o9 f7 @* j8 O# W
ask turtles [
2 w) ^8 H8 l& J& P" w if energy <= 0 [ die ]' L9 J; r% j- s3 z
]; _1 D9 x* |, i, @; t
end
6 Q, i. P4 {& ^; z: F! `6 cto regrow-grass
$ J) H: |7 _4 {0 E9 j1 D" ` ask patches [
& d6 N. }; X" K! \! I2 Y if random 100 < 3 [ set pcolor green ]
$ E- P' S" p# A; Y ]
- T5 K/ P9 [ s& N0 W6 |4 Iend
5 {$ i% }. l+ C6 ito do-plots1 X& K* S9 X" _1 G2 i6 ]3 j
set-current-plot "Totals"% I9 P; ^. L& _* o
set-current-plot-pen "turtles"
: Z7 K9 e0 _6 h- |" R0 V# n+ u1 m plot count turtles! M V5 ^/ ^" E8 W6 n
set-current-plot-pen "grass"
! }9 x; |. V R9 L. K; v plot count patches with [pcolor = green]
# g/ g5 W3 N" l cend
7 Y# ]) d! G: r可是运行时提示no such plot: "Totals"4 H# i0 N0 i) Y
error while observer running SET-CURRENT-PLOT
2 w8 h, O& w0 v) \ called by procedure DO-PLOTS
- Z' q _5 W7 G+ R; P) ], x called by procedure SETUP
3 {2 u2 T4 `3 N5 [9 a$ k called by 按钮 'setup'
8 ^3 [; E9 R% \3 s求大神解答啊 |