我编的程序如下turtles-own [energy]
p% J7 T" K( N3 @8 D5 t) \to setup
5 k/ r% V9 }* h5 `3 D5 u: E M: X# l clear-all
1 W+ n+ Y+ @: U2 e setup-patches
1 c: h' m4 x+ u4 ~0 `& k2 Z create-turtles 100
/ [2 A' T- p7 T# M do-plots1 j% P( o2 G& J' s: k! X
ask turtles [ setxy random-xcor random-ycor ]8 J4 b/ I- l& n( h+ X6 ]
end
1 V8 U! Y4 z% O9 x& c+ mto go5 q4 z7 z% ~" V) h7 v
move-turtles
2 U7 j6 Z+ x! z- t eat-grass! U/ o5 x. Q: i% s- F
reproduce; ~% g/ z$ t3 V/ i
check-death
# E# b' J' y, x2 A: H regrow-grass
1 @! Y' e! r s5 b6 @ do-plots
: [2 u" X* r: g6 b& zend
! c$ T5 c3 _1 ~- o7 q4 T" kto move-turtles
' f6 c; Q0 ^/ ]( M! b% W ask turtles [4 E. L6 v/ n& g
right random 360! }5 Y" r0 H2 ^( A* N6 W" c# P
forward 1& B) W! ?; r1 w1 u4 ?" V
set energy energy - 16 N% o, ~% C2 S4 I
]0 V* @; s! j0 \9 O
end5 U% o' ^! G! \6 g
to setup-patches
5 j/ E" r7 q' n9 z) z ask patches [ set pcolor green ]" U- @4 A6 H J
end" j# b) R5 O3 Z9 I, f; v/ O
to setup-turtles
* U" u+ t1 H- f$ j! T( @ create-turtles 100
4 N: N, M* e! M. @1 ~ v, { ask turtles [ setxy random-xcor random-ycor ]
8 }9 ?( I8 m: |6 Aend# P" L, l. w7 h
to eat-grass
' ?6 w: ?8 @& K ask turtles [
6 _4 Y1 o' {. Q3 @& c4 ^$ l7 u0 _! n7 B' l if pcolor = green [( ^) c8 v( X0 X! N1 h* ^ ^+ t
set pcolor black
, O5 h) k2 z/ R set energy (energy + 10)
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ifelse show-energy?
3 f$ `1 D) ~! Z% Z, r# r [ set label energy ]$ _3 m. X& t! U+ [0 @
[ set label "" ]
+ W: r A5 g3 U2 F0 e ]
7 N, l5 A. q! d5 ?4 @9 Nend" |" H2 N% E- i, ?3 x. s1 X$ W
to reproduce- v5 X$ W% X" A+ S9 e- \' X
ask turtles [
' \! \; H1 [3 A0 b if energy > 50 [
/ Q% `- ?+ R) S% k: a set energy energy - 50) U6 U3 K$ w# @0 u
hatch 1 [ set energy 50 ]4 ^6 O b& G2 f F- [
]
9 Y0 G A! ?: d! `, \- V* N1 u! v ]+ p; |: P" y2 y. P
end* B4 m$ c. g: r4 v( t( K0 `
to check-death0 e0 o; y H) p
ask turtles [
1 V9 N/ R# [# s& q5 M0 S if energy <= 0 [ die ] ?: Q, r! X) u% U# Y( Q2 _$ ^
]
1 ?, G$ u( X- d0 Iend$ y' }6 D# o* U* I
to regrow-grass
9 j" C! \4 a; R* m: K0 l ask patches [
9 {, C1 e s* }. \5 n% }" @ if random 100 < 3 [ set pcolor green ]
* F% _% M" a! l8 t" M$ U6 d ]8 R: \1 Z7 Q* z( o
end) l2 }, v6 Z: K9 }- H
to do-plots
4 f' r% J* ^. g/ m4 ~7 j# d7 I set-current-plot "Totals"
, b9 Z5 N- R! S) `7 T7 n9 R: ` set-current-plot-pen "turtles"# g. _' j7 ]' f6 I# s% B( ]5 S
plot count turtles4 v+ s( \; r6 N d9 M
set-current-plot-pen "grass"
1 \- O+ _- x/ x8 V plot count patches with [pcolor = green]
. C" ~9 U$ V% Send* a$ T1 q4 g }( Z4 Q% `# \6 W
可是运行时提示no such plot: "Totals": O- m0 K4 @0 q
error while observer running SET-CURRENT-PLOT( Y: L* \2 c j) P. Y3 }
called by procedure DO-PLOTS
) \6 [/ l6 @/ F3 Q4 X+ j; V called by procedure SETUP# d) S! W( z( K; a
called by 按钮 'setup'
# R+ [4 B* `' n! y求大神解答啊 |