我编的程序如下turtles-own [energy]7 X; ?. I; f9 m
to setup
: H" c$ R8 T" p. X: L6 u2 m clear-all
& p/ r3 p: |& z" |3 D; B setup-patches( v7 S$ _1 i0 @7 S1 g- H: H: j
create-turtles 1005 Q0 Z$ l2 b7 ?" Z
do-plots
+ B5 m* |- D( Y% A$ a1 q6 R$ e ask turtles [ setxy random-xcor random-ycor ]
4 t* }4 n: h3 W; c/ [( ^end
1 F* K* }5 ?7 ]6 ?: wto go
l: \% ~, j7 l6 o' N1 D7 ]4 M move-turtles
9 o4 Y7 B+ W% Q3 \3 L eat-grass1 `0 |' ] l4 d3 U( u7 d" Z
reproduce! e3 C5 v: q' s
check-death
' D4 W5 b/ {/ O5 ? @4 M) |+ i regrow-grass0 X' ?$ s5 Z' K. Z( v0 ]
do-plots
$ v! `( c1 _( `* B G: |end6 y. F' O, P) F& n+ W2 H( P
to move-turtles
! p. R7 m5 I! i ask turtles [
8 E0 \3 a& F5 X6 T right random 360
# r% \3 i) n" U% V* j) D forward 17 F7 x6 ~7 c2 ^6 a
set energy energy - 17 S* O, i% H: [% k6 N
]
8 D B/ y& a4 n5 c7 [' \; Z& l( Mend
3 p" t4 W4 Z+ C* hto setup-patches; y9 g& h6 c6 S- X V
ask patches [ set pcolor green ]
2 S. T) g1 a+ y' G/ \7 Fend, s2 g' A0 s7 C% x
to setup-turtles. o, M M7 T+ }6 D d8 S$ k( ^
create-turtles 100( b% R& \! h& w1 [! O( r4 c
ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass
2 m3 x( B3 W" c" L ask turtles [0 _$ U7 a- u7 v/ G5 j7 Z- [
if pcolor = green [
3 Q- O8 a' t" t set pcolor black7 K5 z9 V6 Q# R$ I- }* S$ o
set energy (energy + 10)5 z+ ~' B; b" Y" `( W/ b5 F
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ifelse show-energy?7 B3 I8 S: W$ C7 h1 |; X3 g
[ set label energy ], w& ^1 j" P/ Q- J4 N" \
[ set label "" ]
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end
6 P( |, Z/ K+ L. h) L, s' y {# Rto reproduce
, }! R2 k \3 R- @* W ask turtles [
* E) o9 G% F) k9 c6 Y1 c7 Z if energy > 50 [
% H$ ?: C# b) a; O* Z: B3 M) J8 S: f! @ set energy energy - 50% ]. M: v+ Y4 B& ?) p2 D
hatch 1 [ set energy 50 ]: @0 z1 a! X8 x' d3 K' c
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]4 D) R' @/ |6 o! O! Q4 \8 V
end
; w1 J5 {( m5 U) ]3 R' eto check-death
7 [1 _% T' q5 _+ A1 H* T ask turtles [6 e/ K9 g* D* ~' K" k
if energy <= 0 [ die ]
1 Q9 S+ V5 I' W/ ~* H, f# \ ]7 k% ?8 C# ]9 c+ @) K0 Y
end
) f4 D q4 Y# u: Zto regrow-grass5 g- }5 _8 K; k$ b+ S- M
ask patches [
: U3 E& X; G9 P) e1 D if random 100 < 3 [ set pcolor green ]& e. ~2 }6 G5 d9 }5 P+ @3 }
]
4 I+ u2 y; }1 t6 L$ i, C% Iend
9 ]: }& g: ~" ?" Xto do-plots
@$ d, d- K+ x6 p/ l# H set-current-plot "Totals"1 Y5 D6 p, M. ]# n. b) ?! J
set-current-plot-pen "turtles": U$ G; G3 p( S3 b6 \
plot count turtles2 b4 X3 V9 U( m8 c# f6 ~- u3 S) p
set-current-plot-pen "grass"
( _4 i( o9 W5 \3 {, \) o& |& Y plot count patches with [pcolor = green]/ Z2 f1 _5 ]: |, t3 g
end
% `0 ]; w/ N) D8 v; G可是运行时提示no such plot: "Totals"4 I2 e5 ]8 r- k: p# ]8 T( U* j: C) O5 w
error while observer running SET-CURRENT-PLOT; O2 U( q) \' U2 U# S n, }
called by procedure DO-PLOTS% K H. o! j& x) w
called by procedure SETUP
6 [, l$ c B |+ y) c called by 按钮 'setup'* I, Z* |: o, J- y# W! U# h
求大神解答啊 |