我编的程序如下turtles-own [energy]
( A: g) |5 ], {, [+ B, fto setup
3 g+ S, W; `4 N' S& D clear-all
5 o4 x6 Z! m' @* M0 X1 e( A setup-patches
0 H# _. d; a: p# Z create-turtles 100
5 u1 ]% `' A7 ~( t5 V6 N' Q. X6 z do-plots: Q- o7 y# N! J' \+ o( u$ V
ask turtles [ setxy random-xcor random-ycor ]5 \! V$ T$ \0 z6 L9 N6 {" y& l
end
* l6 u/ |2 L- ~0 X1 A* Vto go) V: L7 ?/ g% C2 \* `( J/ S# y
move-turtles
+ A0 n7 ^) X- ~1 Q6 J) D eat-grass7 P' q, C3 |) p+ j2 N7 d) ~
reproduce$ }' t- b8 v/ \5 U7 q+ f
check-death. |. i3 O& ?5 d5 C* X8 I P
regrow-grass+ s( M; B/ V( l6 H9 ^9 {
do-plots* Q; A" x6 O7 T. p
end+ q( B' {2 ^8 F0 n1 n/ s; {! ^ g- J
to move-turtles, U- P* {% N8 v5 W: K+ ?/ h. N
ask turtles [5 E( n5 s+ D z" c
right random 360
/ L6 e: R+ ?/ W! k% r forward 1! q# U9 N3 I% Z( F
set energy energy - 1/ L' F3 j8 r& {& @5 B
]% `9 c$ F$ Z% ^% P0 X- @
end
! d9 b" R2 i- I. Eto setup-patches3 o, ]; p* `8 O; L' b$ g3 b/ A
ask patches [ set pcolor green ]* u0 ?, c% B% o
end
0 c$ Z7 Q& S3 t2 _- x/ ^, vto setup-turtles
4 O, T9 @8 t0 e5 c r+ a. `: i create-turtles 100
6 u" W6 W$ g+ o5 ~, s+ z/ _1 I ask turtles [ setxy random-xcor random-ycor ]: j/ N A- n5 V
end
8 v5 }- }; l0 O3 M" b% Oto eat-grass W% s+ s( M( D8 S
ask turtles [- C7 V' J6 N2 D6 q" B5 Q
if pcolor = green [ q4 T. @5 W K7 X, X6 p
set pcolor black
0 a4 E% b7 y7 V5 w6 R* r) j5 T set energy (energy + 10)
( h7 y" Y( T( ^0 [ ]
' o9 L. H- E2 i' o. M7 a) l ifelse show-energy?# q- @5 ~6 A0 Z5 c
[ set label energy ]) y d& b& e1 ^$ s
[ set label "" ]0 L8 m! i- _. g2 R+ R
]& P: x; F- G8 \" m! G' g
end
) j0 M) q, z) I( D6 e2 Gto reproduce
% x2 D+ l3 p& T4 J ask turtles [
' Z2 o$ w! @9 ] if energy > 50 [3 I7 S1 v( y @5 Y
set energy energy - 50: E8 O; ~0 ^# L
hatch 1 [ set energy 50 ]$ R7 M& T& R1 \$ D$ p6 t2 x
]
; b- D& y9 e# i2 N2 n& t ]
- d( I4 \8 n- y0 nend
; x" r, D: x" N; M) Vto check-death8 i' W% c! S9 i0 Y2 D% I1 f
ask turtles [" a) f5 h: |! v) l
if energy <= 0 [ die ]% G+ a3 n* x+ f
] h7 h2 C, J3 z/ q) d
end. ?) @& G, T! \$ V* C1 y+ p0 R: ]
to regrow-grass- ~) w3 O( W0 ~ m8 ?/ u6 L) }* [
ask patches [- R% a; t( ^9 t* X k& v
if random 100 < 3 [ set pcolor green ]* [1 k. Q$ n% k4 Q
]
, x6 _. d" s2 M ?& Iend9 G0 n X( f5 i& z
to do-plots, M) F* E) U& F4 |% ?" a7 e3 l
set-current-plot "Totals": ]1 E/ f# q5 u! u
set-current-plot-pen "turtles". \$ d; U/ T f7 }' a+ J' r
plot count turtles
1 s2 e% R$ U6 V7 {/ H set-current-plot-pen "grass"- s4 }8 W' W! i" I
plot count patches with [pcolor = green]2 A4 O5 a: r0 v& c
end: u$ B. o6 x/ {0 e0 k) {8 |
可是运行时提示no such plot: "Totals"
3 ^! B. m R/ Rerror while observer running SET-CURRENT-PLOT
# t% B. H. n6 |+ e p called by procedure DO-PLOTS
# X d6 B+ R" V' R3 \& ]) D! t called by procedure SETUP8 h8 h. c) v# d) O* F2 h' K
called by 按钮 'setup': x& _& B6 Z. o( l9 p
求大神解答啊 |