我编的程序如下turtles-own [energy], z: g1 d5 ~6 [
to setup
2 E+ B' ?! |$ E' L2 b clear-all
! a3 q/ w" j' h* F' h: G$ |$ i setup-patches
2 d7 u& @0 O& l. }. r create-turtles 100
8 T& ~7 g; r V b# w do-plots$ p, I, ]. N) g! S
ask turtles [ setxy random-xcor random-ycor ]
0 ?$ `2 q% s5 S! hend/ l% |( c: E3 P. s4 g4 t
to go
) d4 k9 T) `& n move-turtles* G- T1 y2 B/ V8 }: V
eat-grass
8 X1 ]. p8 C3 u! Z! q, Y" X; J reproduce3 u4 X( x' w! M: q, J6 ^( a5 D
check-death: f2 S9 B6 ^5 L. j. v% V
regrow-grass
# c+ D/ H" S: v do-plots
; L4 v8 K! _6 B3 b5 @' ~2 ]. |4 Fend
t" f% F% I; P% @0 Hto move-turtles$ J4 x& n# u+ V+ ^9 S. \( k' a
ask turtles [; ?+ c! f1 ?% @; `+ z- k
right random 3603 F3 G- E' j L X' W6 z
forward 1
1 K P; D' o2 X- C' j. O4 M set energy energy - 1
4 ~5 i' w) B/ m" q+ l* a& L" G) V ]
' ?0 i5 A0 M- l5 y+ R& n# j# t0 Bend. Q7 Y$ S% V5 ]9 G& k4 \% y) B! C
to setup-patches
% J9 ]: j: O! T& B8 m ask patches [ set pcolor green ]
% s4 X, ` D* s# F) c- ?- i% \ Jend/ y/ [8 I8 m9 b2 u1 R
to setup-turtles
) f! I- s/ _: D! f8 N create-turtles 100& |# U' N4 z, ~. ]' _3 R+ s$ [
ask turtles [ setxy random-xcor random-ycor ]2 h5 o2 X/ x$ k& @- H: P) a ~
end& U* w& d$ `5 y& I6 F# O1 @$ K* Z
to eat-grass2 d$ W( ]+ U+ B( H! R5 u
ask turtles [& j, G. X8 x' @2 u' S$ t
if pcolor = green [
! \3 r8 x8 o( K- R- Z set pcolor black6 q7 N2 ?! n. j3 [( h1 S% ]
set energy (energy + 10)
- @& S2 A8 n3 N- f) K4 R+ l7 Z o0 n ]2 u3 j& F) T* ^/ ]
ifelse show-energy?
' q7 S: x* j9 [# y5 x6 Q7 m0 u [ set label energy ]
7 V5 |1 R/ q( _) B; D& f' D: ~ [ set label "" ]" \4 K7 c. Z9 G: c+ b: k" C1 J
]
7 J' b0 t; a+ _7 y$ t. |! Uend: \+ Z3 F2 b9 s
to reproduce
. K( Q' f" W- R5 E- k ask turtles [
' A! }" T9 C5 C+ v if energy > 50 [
+ |3 ^3 Q& j, y- l' }+ m4 @/ L5 ? set energy energy - 50$ ~( v# j5 f z$ F+ s7 ?* P
hatch 1 [ set energy 50 ]
1 `. ?% ]/ O `5 z; G. K ]1 W: K; Y9 ~ X3 L$ @, f
]
( m, J1 r* z' ~, z3 R- y0 q/ qend
, L4 ^8 v8 n; K4 R( J! `& A2 l2 kto check-death5 d, G0 Y1 F' \* J. B$ p
ask turtles [
) t% R, @, N3 I% B+ { if energy <= 0 [ die ]- z7 t; h* _6 r2 C
]6 M& X' G7 L6 u( m
end
' S5 d% q$ g! ~0 W) {, k6 fto regrow-grass
- b5 j2 E" k2 F" H8 W ask patches [0 X: Z( w! p6 ^. y0 d
if random 100 < 3 [ set pcolor green ]5 G9 l! K" K3 p8 s1 G0 i$ L! @% y
]2 e1 |& J/ T1 t$ e. I5 u
end
: ?- e2 u5 D" ]6 y4 Z" b( Qto do-plots' C; x# ?. |2 m" e; V
set-current-plot "Totals"( j' B; n7 E7 {
set-current-plot-pen "turtles"& S/ u5 Z, I+ A t% Z. s, Q
plot count turtles
D9 c3 I: J$ _2 P9 N set-current-plot-pen "grass"( w. j, W$ V, R# T' k( F
plot count patches with [pcolor = green]
( n9 T2 ~; V0 S! hend
" K K; y% i/ c. z+ _1 r9 O: e可是运行时提示no such plot: "Totals"
: R- K: x- k4 n/ verror while observer running SET-CURRENT-PLOT) {' [7 x) o- t: Z6 N
called by procedure DO-PLOTS
& T1 M6 R" N% z/ k+ R called by procedure SETUP( K+ j& W4 }# b# @5 }: f
called by 按钮 'setup'
4 x8 }- B8 j, K# j, v9 D; j( G0 P求大神解答啊 |