我编的程序如下turtles-own [energy]0 J& _! V. y' J* x
to setup
" g8 @+ C' x8 z6 v/ _0 {. J clear-all
7 f4 D) C ?1 f. x7 `; ^6 Q setup-patches* M; i( N3 q% v Z4 s; d+ Z
create-turtles 100
& I& r5 t" R* O5 C0 p do-plots+ }+ b' U: u r& Y/ U3 n/ F( \" p
ask turtles [ setxy random-xcor random-ycor ]9 R X& i* O0 m6 G) C
end
1 `- O5 P% b1 O* e/ G* L b: [to go
0 O! z/ k f( Y7 C move-turtles. Q! p1 ` F. U& d9 c# [. @
eat-grass4 j* m2 B4 M, s3 u' K4 C# h9 a* @
reproduce! T' w" P3 I3 H! r, [
check-death
+ A, s8 ^1 d# X; W( v8 d regrow-grass
+ k5 T0 r# c. _, \& U do-plots
" n, {% _9 T+ ]& D# m' ~end
4 T8 Q1 k O# {! g. W) }to move-turtles' b# V- g7 t# A0 d1 c
ask turtles [
3 @4 ` V- R. T+ t- C3 H% x1 } right random 360
. [5 T. L( N1 O! x }/ `* k forward 1
4 \) f, W5 O3 @ set energy energy - 1& t) ^0 B# t% ?+ w( R0 [' y: R
]! g2 l4 h$ Q5 L7 R. P0 p# V3 Q1 B
end
( J1 S. D w V5 _to setup-patches' I2 {' @" J; ^1 N" X
ask patches [ set pcolor green ]
- X2 }9 ^* P6 D9 v! ]* i/ send
1 K3 e; B. {& u3 k$ S$ T7 Uto setup-turtles
5 L& y- G& q$ A3 C1 k. d create-turtles 1006 b" X. K4 a+ v- y I
ask turtles [ setxy random-xcor random-ycor ]
. U: |1 _9 q/ iend9 @0 ?0 Z; E0 e% W, s+ h! K' m( h! C* l
to eat-grass* B+ Y0 r* ~6 \5 H# Z$ ]/ b+ B" e
ask turtles [- a* p6 p7 S O7 J5 G3 W( `
if pcolor = green [
# A R( L% c' k& M* w0 Z6 r set pcolor black
. T9 \; \1 h3 m2 y: M5 a3 y0 H set energy (energy + 10)3 w# s `' V9 z6 \ h
]. D' m2 A. H' n% m
ifelse show-energy?/ w1 o: I" j. A: s9 L! _- u1 V
[ set label energy ]: v# R+ D6 X0 c; n* ~2 C( C7 z
[ set label "" ]
' v: p* e7 U: ?2 t# l1 H ]
1 o3 E5 |, G$ P4 vend
& P7 X p- x q" gto reproduce+ b% V/ a+ F& |1 o" ]$ \
ask turtles [
S: q. [% w) B* b7 w if energy > 50 [# N$ F5 d6 e# E% I8 I
set energy energy - 507 ]& B o; k, u0 B" ^
hatch 1 [ set energy 50 ]
/ c1 m4 C! W' ? ]2 ^* P5 v( k d0 Q# E/ U/ r0 _
]# F/ r: X: Y0 ]. x* s+ Y1 T4 y
end
" C! M4 n) |( ]! f5 K/ P; Cto check-death; E5 c6 i0 I0 ?9 m
ask turtles [- g6 v. [) r5 R" R* F! ~7 @
if energy <= 0 [ die ]$ X3 I; H8 P+ `* Q' ?
]
6 M/ H1 a, g8 v/ g, ` yend, |" G5 q7 @1 ~! K; ?: z4 {
to regrow-grass( a/ n: ?; Y; [: Y, G, a
ask patches [/ }, h5 r g$ B/ R! |: B% [
if random 100 < 3 [ set pcolor green ]
8 M# G: S, J) E N/ k3 p ] o9 U8 v* l2 z0 y5 G# }7 R9 S
end
, L7 ~- J( [* h ~6 u* gto do-plots7 W5 Z* X8 }+ I X; d" y' K
set-current-plot "Totals"
1 e. ^) v( z- z/ S( v set-current-plot-pen "turtles"! k- N$ {4 j2 @0 w
plot count turtles$ E: Z8 w) o- a! I0 K
set-current-plot-pen "grass"" M) k, s5 R' w* j/ B
plot count patches with [pcolor = green]
1 X+ q$ t U D8 C& R. r& @( Mend% D6 X0 _) f( M3 B& ?6 W
可是运行时提示no such plot: "Totals"2 l% \2 R8 U- S! j+ ~- `$ i
error while observer running SET-CURRENT-PLOT
$ }$ }" t* o( ^, m# W6 Z called by procedure DO-PLOTS
& G8 } S" K: V( {1 H0 e8 Y called by procedure SETUP; e0 Z l# x% G Z* m7 H$ T6 N7 n
called by 按钮 'setup'6 M7 @. d4 x) ?7 N, s J
求大神解答啊 |