我编的程序如下turtles-own [energy]" J3 E8 m7 b1 P) K% T& T
to setup/ b8 t8 [; {! @( i) g* |
clear-all
+ d7 `3 \! x2 o: ] setup-patches9 H1 n6 U& \* C7 v6 A5 U
create-turtles 100
! C% i9 m0 I# w4 e/ p7 } do-plots
' f3 a- q* L9 u& J; m5 Q ask turtles [ setxy random-xcor random-ycor ]
+ a; [7 l4 \1 W7 i t" Oend) O; W2 Z+ v4 R+ o, u4 d/ C
to go
# w$ E7 V% u* ] move-turtles) e# C+ Q& b4 l4 s" H/ A1 W
eat-grass9 a" b" o2 S' x) T
reproduce
# G% v X( N' C/ z/ N v6 w check-death" M6 Z6 V6 v! X. B
regrow-grass, D2 F" j" l$ L* o
do-plots
9 q2 p2 |! m: q! \. R: ~end1 _( S' X- z2 Z' @9 \" A
to move-turtles
5 v5 e- w z: _" j9 ?: I8 C ask turtles [& ^" p8 j/ W5 ^ M2 J) T5 A5 i- Q
right random 360
5 x& y) `) G6 y3 d: ^$ u9 M forward 16 r/ s8 j% e: }8 H7 e
set energy energy - 1
2 ~- W+ ?' [* U8 e. E/ F ]4 ^9 ^& c$ e4 j0 {9 z
end' G5 o( A; U7 K) ~! ?4 J& g; o- B
to setup-patches3 [- T3 f- D z) W. Z7 x% y
ask patches [ set pcolor green ]& \" v& T+ P7 K4 I6 H$ w
end+ D8 X( K4 \0 l, i" a* J
to setup-turtles
0 P9 L, B+ }$ q. w* I9 w create-turtles 100# M8 u. T% A7 k+ s$ R7 L+ C: P3 m
ask turtles [ setxy random-xcor random-ycor ]
# u) i" {* |8 F T2 q+ |0 o6 _end" e5 J ^3 q! n; D& n U1 f6 `
to eat-grass" f" d/ B7 L9 s$ y u; G a
ask turtles [
$ C9 U& h: w3 Z if pcolor = green [
2 s; `; Z" x! B0 n3 [+ J8 V set pcolor black, |; X( W; Q1 C9 H! l
set energy (energy + 10)
8 C8 v3 e [3 o$ B! Z* I j ]
: S# E" ?; N+ O. \ ifelse show-energy?8 h% ?- }) B6 p3 F
[ set label energy ]2 L: M2 h6 |( x0 c) s, `; W3 v E2 b
[ set label "" ] }- ?3 c5 Q* r$ {
]1 Z! G! r7 i% K3 ^- Q% Z( S
end
+ `; a' q* X6 hto reproduce7 u* e9 P' O% G; T3 z
ask turtles [
' t& d. E* K5 u* j" o- p) f/ ~: Q if energy > 50 [
7 n1 X( ]; e; r' E set energy energy - 50" M5 x$ ]& }! H9 K0 H
hatch 1 [ set energy 50 ]+ r7 a. a9 ~1 b9 M" I9 I( y
]
8 o; B8 ^4 l% h) k, F4 Y& F0 G ]* f% u1 J R+ ^# _
end% h3 ~& ^. n' C1 |' j
to check-death
+ Z* a# K8 b* B9 ^ ask turtles [
$ O! u) m. U; { if energy <= 0 [ die ]
6 n) N- g- N; N5 v ]/ R8 k0 g- B# N4 U+ r7 L3 o
end) j ^) n; [5 D2 r; z: B
to regrow-grass
' J- f$ s6 l9 m6 F7 z ask patches [
/ K' h9 `* X. {9 A7 ]$ p! u$ q: T- q if random 100 < 3 [ set pcolor green ]
/ R- A0 s5 |" q2 z J3 `# n" J ]8 e- k5 c; M3 U6 l$ ]8 X) f$ A
end
, g- j& S7 w5 ?7 ~5 Y' Z5 W9 {: Sto do-plots
4 {( ]0 P& o; ? M set-current-plot "Totals" c- f* z/ y3 e8 u/ L' R
set-current-plot-pen "turtles"
- r3 [7 z1 ~7 z9 T. C4 a plot count turtles
0 h7 z0 x* R: t' H Z* ^! j: S set-current-plot-pen "grass": @1 {: ?1 I; G% {
plot count patches with [pcolor = green], A3 ~8 F' B2 z. V; t! P' t9 b. Y
end
& _% J0 H# `9 [0 J" Y' [可是运行时提示no such plot: "Totals"
( Y& Q6 M: b% P% c* S8 J5 eerror while observer running SET-CURRENT-PLOT
7 b! I$ o% j; K/ d* P called by procedure DO-PLOTS4 e( ?% t/ w$ ~' n! D0 J
called by procedure SETUP
" B$ f. c( G5 v1 ~5 V* D called by 按钮 'setup'
1 H8 |/ d \1 L9 ] k4 e% c9 E" `0 U求大神解答啊 |