我编的程序如下turtles-own [energy]! ~$ T5 d0 g) K( d; T/ {
to setup5 R" A' j$ |* M5 F ^
clear-all
1 i2 c5 s) \. v% U) Y setup-patches* c# i/ {' h$ w# e1 l
create-turtles 100
7 `; \1 f, ~* @ do-plots4 q, v6 |! k S4 T- M# M0 F. j
ask turtles [ setxy random-xcor random-ycor ]8 ^* r7 J9 p; H+ U9 P
end9 ?# A+ i; F) M- Y* a
to go; E0 Q5 [; ]! W( x
move-turtles( Z$ s4 D' y( {6 F! s+ G
eat-grass
; Z; ^1 x; q* A reproduce' i6 G+ s0 {' H+ ^! w4 r+ t
check-death
" N8 [% `. c( h regrow-grass9 Q$ S: n% H/ S: a
do-plots. h4 S/ {5 J& \9 P! k3 ~$ {
end" {5 [( ~7 u' M0 l4 V2 j
to move-turtles+ j. H' I1 q/ n5 ^3 G F1 w
ask turtles [
' @3 F) @6 r) h3 `3 ~; h# t: Q* a' z* V right random 360
" X# V' w0 c0 `: N; _6 ^ forward 1
, @# \5 r- \3 i/ {5 }- s( s set energy energy - 1) B: O1 B( o' x9 {. C+ Q
]7 M+ o- x/ I6 ^- \7 }+ i8 ]1 e6 d- b
end; m+ k, M( y0 @
to setup-patches8 e/ z7 n% \. E3 ?& z
ask patches [ set pcolor green ]! r3 v, y$ }/ p- S0 ?2 H
end, ^$ @; e9 }- E! Z1 q% W
to setup-turtles
4 s9 F. Y- }& [, c: {1 U create-turtles 100
& T7 ~- S3 b5 O7 j3 I L ask turtles [ setxy random-xcor random-ycor ]
3 e" T' x8 q; d' O. vend A' g! s" i/ `. t% j; W
to eat-grass9 s& w/ X+ K/ [4 h
ask turtles [4 L3 E/ i9 A6 K; s Z; s: \+ P9 z* W
if pcolor = green [8 j! I: T0 p1 v6 r' U# S
set pcolor black
5 ]1 L( U% s: T, o1 v set energy (energy + 10)
. o ]( Y: T' ? E' ` ]
8 _ t: `. S( W3 n ifelse show-energy?
" L. p' B/ ]7 y- j$ ~ [ set label energy ]4 }6 M$ A2 J* Z$ j. M& N% _
[ set label "" ]. ^: _6 M2 x* M: q
]
9 M$ _. |0 A* z: s# w- y5 dend
$ ?; ?+ K. i+ B) pto reproduce9 C) Q3 |) _2 \" }
ask turtles [% Z/ E* }1 C$ L, k; G* t: @1 w
if energy > 50 [/ ~$ _# T8 j8 u- _4 F4 J( F: ?
set energy energy - 509 m5 e8 J4 n6 B' \, J' l
hatch 1 [ set energy 50 ]
' x# g: A! A% h ]0 s9 H( D3 r8 _: ]
]
& G/ _" [7 w hend
' \ {- h O/ Eto check-death
. z. O8 z: k1 I* e/ K4 R ask turtles [
5 f. R5 Z& Q* k, h5 o if energy <= 0 [ die ]1 u, w. }7 X5 |/ k' V* ?: q- }
]# T4 g) E% G+ w& D1 @( j
end
/ x9 l& D: u, q$ L9 L7 {7 Hto regrow-grass. F5 N9 a8 [ U
ask patches [7 ?, ]% X O& ~
if random 100 < 3 [ set pcolor green ]! y$ t0 } u; \" Z
]
2 m4 w7 H# z4 k( pend
& f _; Z4 v& G4 a: R% Q: W0 X" nto do-plots! N% I- F1 W9 q
set-current-plot "Totals"
' `! S0 D, S9 B& I! Z set-current-plot-pen "turtles"; O: v) x" G* E7 j) H
plot count turtles
/ J' I4 R- k, y: j set-current-plot-pen "grass"% I, z$ f* ?, M
plot count patches with [pcolor = green]) x& Y# ]( C- {+ X
end
* r) P/ ~: j, i可是运行时提示no such plot: "Totals"
^; E2 u3 r" j) ~error while observer running SET-CURRENT-PLOT
6 C4 r/ N1 ?0 P* P% h2 o5 c4 }# ` called by procedure DO-PLOTS+ h. M4 ?, \9 Q+ b. ~; Q& o# Y' ^
called by procedure SETUP
* J `1 f: y; w( g called by 按钮 'setup'
8 R3 Q9 K u& U3 @" \9 j. h& T求大神解答啊 |