我编的程序如下turtles-own [energy]& U2 p/ ~; J5 l, C+ g
to setup* Q( X) C! M% K- m z" z& ^. ]3 w- H
clear-all
y/ t7 ~- ^9 Q! J: T y setup-patches
) Z7 o' A6 B4 G5 b" I create-turtles 100/ ~- j; S2 l% u' F) ~9 D
do-plots
* R/ x, L* }4 M+ ]" W+ U& b; j5 \ ask turtles [ setxy random-xcor random-ycor ]
2 K5 \0 u5 G) T! E: A. iend
2 h T3 ^6 y8 |; Oto go
5 { Y8 y" O+ D4 v! P7 s move-turtles
. G# I9 y, U: |0 z6 ]; Y eat-grass9 j4 b; |' ~9 p' {7 K( f& M( J& n
reproduce
: a/ n) f7 F1 F+ ?: ^1 n4 ~ check-death
/ i1 L1 t- X' X: s regrow-grass3 w! ~1 P8 `9 {( K& w
do-plots) e# G2 {/ H$ Z& \
end& d5 ?5 F0 q# t2 c( C
to move-turtles3 G+ p& u/ Y% Q" @0 e# b5 S
ask turtles [4 N' H# U$ G% ~- l2 k* q, G* g! n
right random 360
- A0 \$ I0 J& o7 B, Y& W forward 1- k' t4 q" G7 w% X/ j
set energy energy - 1
* b& y- k3 @4 E3 L6 ?7 \ ]
3 I3 ~0 ~# o2 r& `+ X: Cend$ T2 X# f j4 N, w# {
to setup-patches
# y# v5 t+ f5 X ask patches [ set pcolor green ]
+ @0 d5 r2 k1 o, \; k, h! e/ Nend8 l. ~- }8 q/ B$ C7 h9 X
to setup-turtles
9 j/ t. ?) z; Q6 L7 J8 s4 ~- q1 v create-turtles 1001 u; |* {1 K# F3 t, P
ask turtles [ setxy random-xcor random-ycor ]) o! Q! a0 A9 N" u8 d
end7 z/ n; @# Z0 J) i1 k* ]4 p9 j. K! A
to eat-grass" Q! l1 I. m; [7 j/ E
ask turtles [
# b8 P; s9 a1 V3 @! Q if pcolor = green [' X0 M1 U$ a3 V
set pcolor black
- l- [# }1 T3 x* O9 I# H% _+ A% i set energy (energy + 10)
1 ]3 O7 f: L- ]/ c+ \5 M: i) l ]
V# j& o, n; L! U2 x o* v# L* d ifelse show-energy?
! E. s& a5 A9 m [ set label energy ]9 s) }3 e1 Z, L6 `6 {
[ set label "" ]
7 r! H* {; |9 k2 P/ j4 X8 l ]5 j; I; V) y3 b/ M, a! z
end. I) E. u) E' g9 a! ~% x8 @
to reproduce
. t; }" r$ @. |, n; ]9 [; S( _ ask turtles [
1 i1 \6 |! e6 ~1 C( v% | if energy > 50 [8 L# Y/ S' `/ L7 o( ^
set energy energy - 50
! g% W3 @& r! D8 g/ { hatch 1 [ set energy 50 ]5 U- ]6 Z1 }: M: V
]
! {% h: ]6 u& k. v! ^' ?6 P" l. }# u; K ]+ O+ i1 ~( y! z! ^/ b6 b8 u& \
end0 C9 i. R1 U+ N) v3 B% B8 n. l
to check-death1 P2 U/ e2 W8 E
ask turtles [* S: e; C+ c3 w3 v6 [
if energy <= 0 [ die ]' L) l, p. _9 X; l4 {) {% W
]
+ @* R, H" _$ Aend
# C( L7 k d) O2 [+ vto regrow-grass
; m% a% S! N' x ask patches [
" M# j% a; H, P) t+ f if random 100 < 3 [ set pcolor green ]6 B7 X! |; e# f$ n/ ]6 D2 P, Z
]9 w" _( {) Z2 s, _. ~
end
' M2 z3 M6 g6 ?, ~6 x% U+ H3 ]; E [to do-plots
/ k4 T6 R9 [9 R4 O0 H, ~) F4 l set-current-plot "Totals"
. @" T- ?0 Z3 @2 }3 ~+ ` set-current-plot-pen "turtles"+ o7 L/ F1 w+ Y* v* h
plot count turtles, X- v: p" S$ X* G; y
set-current-plot-pen "grass"8 w9 c5 M. N; Q% A2 |
plot count patches with [pcolor = green]
7 l/ I0 o1 X* H# Aend
" e) v0 s* E1 K3 e可是运行时提示no such plot: "Totals"5 ]( f1 [ I0 v0 d1 o' m5 K6 D
error while observer running SET-CURRENT-PLOT
9 Y: U+ S0 Z4 F6 d called by procedure DO-PLOTS
# z7 U2 A8 X8 i, N called by procedure SETUP1 G3 N7 k* I- Z0 ], Q0 h8 @
called by 按钮 'setup'1 K. {1 [$ o) H2 j9 G' p
求大神解答啊 |