我编的程序如下turtles-own [energy]
3 |5 E# F! s. }: l$ r' G9 Xto setup( ^; V2 S& A* F
clear-all% s$ i1 ]& W8 s, R7 e
setup-patches1 i. { D6 W( w2 V& F+ t6 F
create-turtles 100
. r1 x5 ]! n6 ^2 p( q* M) d5 G do-plots; O I( v2 _! L2 @# Q0 ]2 A: {* _" ^- l2 U
ask turtles [ setxy random-xcor random-ycor ]
5 U: @- g; K: n" |$ x/ m }/ N' Bend
( E& N& @3 \( W2 _to go
4 Z A$ i: F8 S move-turtles
, U8 O8 ~; t, O4 Y0 F eat-grass" ?) m4 j2 p3 f
reproduce2 Y2 T$ X% U: |" O* I, l# i. R, {
check-death
5 l) b0 Q+ [" K regrow-grass' c/ b3 z* R! H! f
do-plots- f& D% a( ^! J$ K
end; j1 {& u2 v5 s. _. z e6 L
to move-turtles
/ H8 J9 `4 D: f& t2 x, C8 x ask turtles [
% D5 K o9 r6 _7 I6 S9 _2 _6 t. j right random 3608 J: x% R) ]0 \& k0 |8 _6 d; j
forward 1% t7 l4 \8 V' \. G
set energy energy - 1
# A! N$ v6 ~2 o3 [ ], Z$ [* N, H4 G3 D* ]
end
9 A, N. A( z+ Q" ~to setup-patches( Q d& M8 t8 A( W) B3 A
ask patches [ set pcolor green ]
9 I4 j1 s( c- S e$ ?( Gend' m) D9 R6 D- I& g
to setup-turtles7 `' F j& J! |# a! v* y+ M/ V3 p
create-turtles 100
8 }+ N, j* _" ~9 N ask turtles [ setxy random-xcor random-ycor ]
5 t$ K! G1 `0 n/ T) G6 _end
# M1 D7 N3 C7 |- P- }8 {; }to eat-grass
_" @8 ]' W! i- i/ q r. [) Y0 g4 O ask turtles [
% B$ t- w+ |7 V) x- O# } if pcolor = green [, a. v1 n+ C) x8 u& [. G
set pcolor black
+ q+ H( S8 g; m1 ~. i set energy (energy + 10)
8 D% O+ Y: }. B6 q: I k ]
' o9 j) o$ Y- N- O) @1 f# n ifelse show-energy?
J8 k8 x; r: w i( x [ set label energy ]5 w5 u- C6 E8 ~- G& f, b4 R
[ set label "" ]( f% t* ]2 ^: a. x
]
, n, @* k. ~- S+ o& y& b# k1 \end
* D. a/ r" _9 ^. gto reproduce
( [4 |9 N4 ^. z' f/ p8 x: d ask turtles [
* H8 s/ f. A. P- _: B4 V! q if energy > 50 [1 w; _7 p/ ?" {8 | o A# B
set energy energy - 50
5 S" o f, w" Z3 `! ` hatch 1 [ set energy 50 ]8 R- d Y* h* c7 V G
]
1 K" M3 G2 R- y' Y2 E ]
4 P# t/ I1 {, @6 p6 Tend" G; ?8 K# E6 h6 |/ `
to check-death1 m0 b' a2 F: }/ @; u* F
ask turtles [8 E. ]; f3 H4 Q; k6 n/ r+ S' a; t
if energy <= 0 [ die ]( k4 B% x6 I' ^8 Z4 P, Z7 }7 ~$ _
]9 N. w1 y* b' z7 [( E6 i ^& q
end( e J/ O/ L( { E, ^8 P
to regrow-grass$ I1 m( R- Z/ f2 ?8 P% l
ask patches [
6 K, _. u/ B( M2 { if random 100 < 3 [ set pcolor green ]0 o9 u; q( |4 u
]
- M- d# @% e9 F4 [end
( e8 M! a% p8 U! p8 L& yto do-plots8 z6 c8 O5 g' i( v, J( z/ }3 r
set-current-plot "Totals"
7 A" g4 {3 Y& e set-current-plot-pen "turtles"
+ R( M- b8 l% B' z plot count turtles$ E! I4 ?# h4 l8 l3 O
set-current-plot-pen "grass"6 F# q: ~0 x. s# h
plot count patches with [pcolor = green]9 m% }$ N; {9 W2 L9 ]4 a0 v
end
5 N8 k; _8 d m& F5 Y' T/ K可是运行时提示no such plot: "Totals"2 V2 N# _, f5 \: S) a9 U
error while observer running SET-CURRENT-PLOT5 a; |4 W7 |$ ? O9 G. \/ [- K( Y8 c6 W
called by procedure DO-PLOTS
8 j4 j( j- L- t called by procedure SETUP
3 x' L1 w' q4 f' k. {; s1 }3 g called by 按钮 'setup'
- D S! {" V# b% _* M8 p求大神解答啊 |