我编的程序如下turtles-own [energy]( ?+ @2 T3 D5 w& n
to setup( ]4 R; X" t4 E* U7 G# t) d, j
clear-all
) h3 r, e c% q* x setup-patches
5 x: {+ Z" T5 m6 L4 j4 } create-turtles 100
& b8 [6 I* R- @6 K* p do-plots
4 h8 x( y* U' p7 ~2 d8 p ask turtles [ setxy random-xcor random-ycor ]# v% n0 w3 {/ f4 u
end
( p2 G& `1 l1 e: F- Gto go
0 b. q' c- }. ~. o ~: L5 T& q" a move-turtles8 q4 t3 ~+ `6 T; Z3 y/ n# i" P
eat-grass
7 B. f) o6 M8 X. Z+ P2 R reproduce: j4 Q+ m! ]( Q( M! {
check-death
4 B) I9 E: M) ]8 L: L. z regrow-grass
9 i1 |+ p+ c; A1 a: E do-plots
$ g7 L1 I3 \: C' Xend, b. ~* O: v2 \
to move-turtles
4 j& \6 R9 i' ^, h# @ ask turtles [
' e& G3 Z* G2 }! |: ? right random 360
, ?, K& a$ [# Z: S forward 1: Q- j) J! Z( R+ R2 E. q( B
set energy energy - 1+ ]) \) \# i# D' W6 Y0 A3 L
]
! h3 x% s7 Q O2 g. ]end
- N: j' E- k3 X1 G( v& R8 uto setup-patches& h3 H/ \( Q0 t7 n
ask patches [ set pcolor green ]
& D, ?' Y w& B5 S/ Pend. B2 n a0 V) ~3 [: w4 a0 k4 g
to setup-turtles
; W7 @6 q1 `+ E. n m4 {2 @ create-turtles 100+ a3 W: x& `+ W% ~6 i
ask turtles [ setxy random-xcor random-ycor ]7 h+ Q9 J) x* _# P' x
end; l% v+ k0 m( H' R0 v
to eat-grass- F8 f9 D. Q6 w8 \4 y' p
ask turtles [! C. I, l E9 q* I" s7 e
if pcolor = green [) |/ t3 l1 p3 T$ s" y
set pcolor black
# b' J/ N: e; X1 F set energy (energy + 10)( ^! o1 j7 ?. O5 U9 n6 x
]
7 H8 |/ D( e3 }& l8 d ifelse show-energy?
8 B n6 c0 F/ X% ]6 c+ F) O [ set label energy ]; z, s2 L D6 q) E* A; j. B0 f1 M
[ set label "" ]8 k5 t/ K: |' q$ H8 Y
]
% x8 U+ j9 i' u* gend
3 L$ `3 y$ e* `# M* U+ ?to reproduce9 K. w) ]' y8 g1 x
ask turtles [
; H5 i, _5 e% ^8 s( x if energy > 50 [
7 R/ [" D! N& I8 N$ {* s. R set energy energy - 50# c w- z; z" H
hatch 1 [ set energy 50 ]2 p1 `1 s* @: y
] @5 u' l: m1 c# y: F+ r @
]
# f+ b" b- B9 [ p% G/ q9 P5 Vend
% z2 l6 M1 m$ w# |8 n# H! ^to check-death
; B3 c7 v& J' v: ^ ask turtles [7 Z0 A d! K D( @( y9 i) P6 v
if energy <= 0 [ die ]* T6 q0 o8 G2 Z: \# b# E* N
]) b2 O" @; P2 J, S, q' n( v
end$ ?9 C- P( [1 y7 j1 A# g
to regrow-grass
: F! p3 Y0 Y: N( E ask patches [
* _5 w: J" k, R& m( W z' b- x n if random 100 < 3 [ set pcolor green ]
- M! I! g. Z% ^) s: T) g1 Y8 o ]1 c8 R* {. p" d1 q& R
end* `. O0 B7 k! k# u! ~
to do-plots
' B. ]% ?* ^8 O8 L set-current-plot "Totals"
& [+ p; I; ]; X8 \& q- o! D set-current-plot-pen "turtles"
* j. I6 j3 _0 m5 U* ^ plot count turtles+ R" r' Q! \% S1 ~( n1 ^" L# V( {' u
set-current-plot-pen "grass"7 J/ u% N1 Y; M' L4 b
plot count patches with [pcolor = green]
3 x; ^# F) i, l N0 c; u I1 {end r2 v( T9 S) m' x5 H
可是运行时提示no such plot: "Totals"2 j1 ^' M1 m: P& v; Y4 \
error while observer running SET-CURRENT-PLOT
6 h. N+ @( s4 e2 T called by procedure DO-PLOTS+ C7 N3 W% T) ] H+ j4 |
called by procedure SETUP
! o& I9 o0 @- X& s) a called by 按钮 'setup'
: l" w/ u. E+ ^7 ^" m, P求大神解答啊 |