我编的程序如下turtles-own [energy]
6 Y( f8 @) f$ gto setup
/ S$ {% Z# ?, z. F2 S$ A clear-all- L m+ l! D# x. v6 u, Y6 E
setup-patches {' i' S$ I) S* h* v1 u
create-turtles 100
* p' l" x! ~, A$ n do-plots3 N- \2 J4 c$ h) @1 b+ s% B
ask turtles [ setxy random-xcor random-ycor ]
6 l) b( B! g5 d! N* t2 y) Fend
1 f& z8 f. m+ b8 b$ G" wto go
f+ C7 W/ v9 }! p2 G move-turtles0 L: g/ c8 l7 H8 Z5 ]
eat-grass
}8 j, G7 f# \5 z5 S7 v# d reproduce
9 L( ^& [/ }/ D3 S check-death5 h" B5 L* a5 {8 M
regrow-grass
) W! g6 u9 Y% G% z8 L$ p do-plots2 v5 T& S3 {6 y7 c! t
end H5 A) r) t+ g+ e/ R4 I& F, z
to move-turtles
' {3 F2 {$ s' f& u7 J4 b1 r7 j5 q6 I2 p ask turtles [
! B. ?4 T# H- P right random 360
3 \1 X k* \/ S9 [1 N forward 1
/ H) |) N/ F9 k, q3 c set energy energy - 1& V- {* F4 E4 T& ^3 w
]/ L: P p! ]4 R3 i- v- J8 C
end
' m6 D x; x5 R. v( Uto setup-patches
- Y7 ^; W- ]: w4 C ask patches [ set pcolor green ]) x2 o) j5 N4 |0 d. v
end
; l$ u2 k* k m2 Z6 Qto setup-turtles
; i9 O& \; i4 |; U! i# } create-turtles 100
+ a+ B$ s5 |2 t1 U8 _' @ ask turtles [ setxy random-xcor random-ycor ]) b. ?+ a$ \; W. S: O) c& u
end
3 r+ h3 A2 T$ X! v' F+ k6 ^0 Rto eat-grass9 L9 v: p N9 G$ p+ U1 f
ask turtles [$ c; m8 ?: q0 q3 C# I
if pcolor = green [
8 p2 h6 f: f. t0 o1 s6 ?) s set pcolor black% A, v8 N7 [" d/ ^# w+ E% }$ {
set energy (energy + 10)0 {5 D% T7 t m1 X; S& G$ B! G" E
]! O4 E" L+ y; i8 B" v+ [
ifelse show-energy?
) \. Z% M8 R/ n6 a [ set label energy ]
/ Q% v. d2 P3 S4 q+ C [ set label "" ]
( K+ J% W# C0 G" s ]7 I z% X3 s1 t
end" n& m6 e# v+ X9 Y4 L2 S+ ]
to reproduce
% i o1 C# B- s: g- w+ z- [4 T ask turtles [' }* e) ]# r& k
if energy > 50 [
/ d! M* q* D. G V set energy energy - 50/ R/ j* o2 T0 J. _3 Y$ G5 {, l
hatch 1 [ set energy 50 ]/ N i1 ?! @& L8 P4 _: j; Z) k& }1 L. i
]' u( Y( v$ h! Y! c: ^/ S" x
]" N: @/ N- Y0 d! S
end6 Z) o* y% a, b7 O! Q$ u
to check-death7 a; s* ]8 n0 G1 r9 S, F
ask turtles [
* K, S5 A% \6 _" q4 V8 W if energy <= 0 [ die ]
& H# C/ t% u6 F' t% x ] r# e: ?0 a- o% r5 O+ U7 M
end# ?# F) V0 z6 H k* ~
to regrow-grass- R" Y3 \& V6 {* M* d5 x
ask patches [
3 p$ W `2 h# T& k7 e/ r if random 100 < 3 [ set pcolor green ]
: O6 n2 X% B1 m7 _ j6 ^ ]
# ~8 \) I. n, e H: S9 _end! P5 W9 _- e5 C
to do-plots/ h& ]% i. _ _+ m8 o( {, P
set-current-plot "Totals"$ Q6 T+ A5 t6 H0 E+ N& S
set-current-plot-pen "turtles"3 p* V, t: ?( q5 W2 _% R+ k2 a
plot count turtles/ | M$ B7 }. B$ w7 A
set-current-plot-pen "grass"1 a7 U+ p5 m7 F' a3 d; X
plot count patches with [pcolor = green]
- g6 {" d4 r( r$ }end, e' b' N; J; N G$ d
可是运行时提示no such plot: "Totals"
' r6 h* M# l: ~& t7 Ierror while observer running SET-CURRENT-PLOT
8 ], B) y n% E/ M- m called by procedure DO-PLOTS5 n) v2 S$ f8 H7 w7 e* u# s5 G
called by procedure SETUP
7 i0 W5 r2 k2 m% ?; @ called by 按钮 'setup'
" P* f( v8 r7 O; n4 ^1 r' `- h; d# G求大神解答啊 |