我编的程序如下turtles-own [energy]
( x8 B) a; h" Nto setup
9 @. M* M# X: j! ?1 y- t2 [ clear-all3 ]! Q" b' u/ i7 P1 `
setup-patches9 C1 f) E* h- t3 j+ w
create-turtles 100
) {% e/ V' v/ k: | do-plots- O/ e4 \0 |6 S2 ?' N
ask turtles [ setxy random-xcor random-ycor ]- [- D* B5 I# ]% q0 K
end
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move-turtles
, ]8 G3 M+ Q, Q( W1 r* V& }* p eat-grass
' V1 I- x1 Y; y( ^% | reproduce
2 A% M V. d& f- C$ @ check-death
) D; b! N0 d8 Y( A8 D& q/ J regrow-grass
& o& _2 z6 ]: |5 a do-plots3 N, X9 f+ @( u9 M5 F2 o
end& U" Q3 L& I2 R s, P
to move-turtles
1 X$ L& l6 ~6 Q+ |% [ ask turtles [) P0 _' E# c& z' ]! U E' X4 @
right random 360; t! @, V$ u* E8 g
forward 1
m( g/ b, K& h r+ Z set energy energy - 1/ k" ]& W* E* \$ O4 N* |; @1 z
]
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to setup-patches, f1 q/ {) ?( Z) G9 h+ d, z
ask patches [ set pcolor green ]& O R& i) M9 _4 W& A
end0 n1 b* n9 N& W0 I3 [ ?
to setup-turtles6 @) C! b, [' Y) G) F
create-turtles 1000 v) T+ A j" q# |& C
ask turtles [ setxy random-xcor random-ycor ]
! G: V5 k, \, ?# g5 u; hend5 u% j1 x7 I; K
to eat-grass
& ?' S1 E1 s3 a% o$ Q1 W9 j ask turtles [
% f. i- I9 l p2 `) E if pcolor = green [ \1 b$ ]8 p) U2 r, Y: i
set pcolor black# }% u& F) u1 Y& p1 T: }5 ]
set energy (energy + 10)
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ifelse show-energy?5 T9 J& V: J7 r/ [
[ set label energy ]8 a9 @4 G% Y5 k' m( p4 w" o. |
[ set label "" ]
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& ?8 `- _& r. Yend% @0 H R& ^3 y) ]6 r1 O
to reproduce
* |2 E* a6 n0 d: R$ v6 y& M2 C U ask turtles [
- q X& {; O0 U" {/ u if energy > 50 [3 Q, d4 b- w6 |& c2 @$ T
set energy energy - 50
8 R8 j: B5 x( U hatch 1 [ set energy 50 ]
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7 l' b9 M, j- ~( Cend
8 S: }& L; S) [! b3 Z& ~to check-death
: `5 g- E! ?: G6 W4 Y ask turtles [, E4 M, {9 p1 D( N; i0 ~$ b
if energy <= 0 [ die ]
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! |8 Z7 A8 k4 @% Iend- B/ t. g/ Z# @/ A, P2 K0 B* N. D
to regrow-grass# S8 S B! o- C0 g I/ ~2 u6 y7 ~
ask patches [
2 C$ J; O& a3 n- u0 l, d if random 100 < 3 [ set pcolor green ]1 f" l4 y T" W* H* w
]
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to do-plots
$ C# n8 S: f, z" X2 ` set-current-plot "Totals"
& B* Q9 B& \, e+ [ set-current-plot-pen "turtles"0 N. T" G* |3 P0 W5 G
plot count turtles! j; a! @* v$ f. K' U
set-current-plot-pen "grass"% g& H8 x: o' t' e
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
' G: N; S a7 \+ ~1 |error while observer running SET-CURRENT-PLOT; w8 U9 `- b. Z: U* a
called by procedure DO-PLOTS
, r* w" B( a/ \6 _ called by procedure SETUP
8 m: j. y1 {* T) }4 L called by 按钮 'setup'2 [- J" J' T$ h/ N/ x1 I P5 N
求大神解答啊 |