我编的程序如下turtles-own [energy]) s5 _; p5 C2 v* ^
to setup
- T, U3 C/ b7 d9 _ clear-all9 k: B$ S+ f: x) C* }3 ~
setup-patches
% t% h$ }4 q* }/ I/ e, f1 ] create-turtles 100
6 Q$ H0 ~/ q7 J+ u% A+ T4 ~3 D do-plots
+ T, ^6 o7 f2 G% M% R ask turtles [ setxy random-xcor random-ycor ]
2 `6 b2 a4 ] {* ^! C) }6 mend
@ L$ v! {* X* h; F1 j! Z( ]to go5 a# o1 }5 a1 B p2 |
move-turtles) b6 ?. ]) j* h; G" `
eat-grass# n6 T" O: i/ j
reproduce' T7 o x. }, b& ?7 h4 V' m
check-death
6 D) x$ v$ \" M, ^, k regrow-grass& y |0 u8 h* [
do-plots z$ ]" q e- z
end
4 I# v M2 m2 u- U: E5 Wto move-turtles5 c& |+ _( f: U' G5 n/ Z% v# a$ k
ask turtles [1 e, b+ m" P+ ^9 M& D
right random 360* J N( f0 M3 w2 n( P
forward 1
! c7 {2 V( F' m/ f set energy energy - 1
- I, c5 z, T: C3 m ]
0 t& G5 H7 V4 Z! t/ R0 Eend7 ]+ Q1 }; ~( X: E3 |$ f
to setup-patches
; V! I9 `4 e B ask patches [ set pcolor green ]
9 p1 E. n6 d. H: {/ w1 k& z# Rend: C C7 H |4 \5 J! _
to setup-turtles
1 M; {& e9 ]! S5 R) ~5 V create-turtles 100& j) b C1 U3 I. [
ask turtles [ setxy random-xcor random-ycor ]1 H, R) ^* L: ~- Q5 V* c
end @% H- p) Z- s/ I3 h1 }7 J
to eat-grass
4 [9 W" a* S8 c* Z( q7 [ ask turtles [" o9 t6 _: B, x Q# f( p7 }
if pcolor = green [
1 g- Q7 _5 ~5 d, W. h! R8 q1 Z set pcolor black
- E3 N0 ~% m" N set energy (energy + 10)/ ?: r; H# t+ a8 n
]
' v; F7 X" M1 u( A# d1 C( H ifelse show-energy?& n( ~- J3 f* b5 s
[ set label energy ]4 |, j( |2 T) e' h& q- @0 B$ q8 E
[ set label "" ]) |% B$ z- L! Y5 e6 q8 C& D
] K! E- k( K+ ?; Q
end
& L/ ]9 p! y T* t* Xto reproduce
I7 H# L( @8 @/ Q# Y5 m% J; R ask turtles [
! ?& }$ i4 y2 Q if energy > 50 [
0 G) T6 m5 K) Z5 @; R3 I set energy energy - 50: e( a- O8 P" ~. M& w
hatch 1 [ set energy 50 ]
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]
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to check-death
' T$ F* v6 H& p% A; m2 R T ask turtles [
2 J8 c1 n* S0 W& Z1 E- D% m if energy <= 0 [ die ]+ _$ a/ ?5 M% Q7 v7 x
]- W7 k+ C9 { |; x9 e% c' [( N
end6 I2 F2 r& M9 n) R8 p$ Z B: }
to regrow-grass
- u3 S( H0 z3 g' d ask patches [* L4 _0 N# C) P8 @& ?
if random 100 < 3 [ set pcolor green ]
8 Y G8 ^/ u5 Z: G ]
2 w t& T6 z0 p- M, U; ]end8 f6 ]3 c6 J$ Z3 T5 `
to do-plots
7 E( G+ `, d7 u; W) m- {4 g( [ set-current-plot "Totals"
' s+ K, `6 j2 r" y7 W3 e( P4 d set-current-plot-pen "turtles"
( l1 U% \5 _$ y& c* [5 \( ~ plot count turtles$ e- G% S( A5 E: f+ }
set-current-plot-pen "grass"
' {5 m4 T2 o) _: ?! R/ O% q5 `/ C/ k plot count patches with [pcolor = green]
* Q5 I& p8 F/ I6 u/ G' ~! eend( ^: ]$ ~/ m( K# `3 Q# F
可是运行时提示no such plot: "Totals"4 T( o! x) L7 W+ A" t2 q
error while observer running SET-CURRENT-PLOT
; ?& S3 C$ c& S' B4 {. C called by procedure DO-PLOTS
8 Y5 M+ z0 Y) s called by procedure SETUP }- ^- ]# ^' o @& q$ g
called by 按钮 'setup'
2 k9 I* y8 q: Z a5 X求大神解答啊 |