我编的程序如下turtles-own [energy]
5 ^1 ~0 K( A- k% n) E4 L! n& ~, kto setup
5 e# P/ p6 }2 g- ]" K& t clear-all
1 P3 M& I/ S6 d. ~9 d setup-patches
5 ^6 b0 B* P( \ create-turtles 100
' J$ f+ S$ U0 a3 B do-plots7 \2 {3 h7 s' l: v, j2 K I8 Y
ask turtles [ setxy random-xcor random-ycor ]" p4 |$ @" [8 @' Y
end. g3 j* F' ?. T# H1 \
to go) ?4 ~) w; G$ ?) G$ I
move-turtles
: l9 i: g) l& e& ?) X eat-grass% Q) V0 ]- q5 P, y
reproduce- \$ X: [ m" m& }/ v/ M" r
check-death- ]; t9 z) P+ B5 b2 S9 j7 [# o' {
regrow-grass
" U4 F: |! v" J. X do-plots$ _' \% q0 Q9 p6 t5 K# R9 Q4 D/ ?
end$ s% N5 k2 l; n H Y D9 }& j
to move-turtles0 C1 `% D9 C( H: @& o k
ask turtles [! w6 R, z% t# r1 t/ Z
right random 360. K. A* I/ ~8 w5 D: h
forward 1
* x3 U' Y( e2 }$ f- L set energy energy - 1% K# i4 U2 s( e7 b8 g4 ~4 @
]' T/ j0 a( |7 H1 M7 q* K
end
5 Q8 n- W' q9 e$ oto setup-patches
8 x6 G& i* J* ~, L& \6 { ask patches [ set pcolor green ]. F O2 w7 d7 D: `7 n. }
end
" p- B+ k0 |, r0 z+ Z {8 r! U$ yto setup-turtles) a5 Q9 F% G( M. b% ~8 _, v9 b
create-turtles 100
1 W+ A2 D2 |" Y! N ask turtles [ setxy random-xcor random-ycor ]6 ?+ F' Q. ]1 b& P- E
end
+ S8 x9 j n& e: q7 pto eat-grass
7 s" S/ z, u( J$ p1 \ ask turtles [. L/ R0 a% G8 i) M4 ?
if pcolor = green [& X; {8 u4 v: L0 H
set pcolor black
6 u- J( T( |# o- ?) L7 Q set energy (energy + 10)) L- O4 {! ^4 `8 z+ W
]$ C; Q U' i7 a# S ~, Z
ifelse show-energy?8 q& L( X# t$ v: V% c7 ?; Q
[ set label energy ]
% ? [! y# j# s# \" B) t [ set label "" ]
) Z [) ~) o, r& A" r, {0 I" M3 j ]
0 j4 Z9 C$ r1 [% M- v+ E/ xend
! s( D, J: E0 A" q; u0 \! Z* v( L2 ato reproduce
# a, Y* }( E8 [2 N/ R1 o ask turtles [
) z& P' U& i% `9 T7 {2 s* R! f if energy > 50 [
6 u: \9 N& w) L' r# g& Q- u set energy energy - 50
$ ` |; p& T4 p7 V hatch 1 [ set energy 50 ]5 m( z9 J2 y, T: G( t
]
. l8 }* A6 |9 u, v, W4 z- ` ]
! [, j) x; |) P2 @end3 C0 x) }6 d1 I4 N* K+ p x0 I
to check-death
3 v* l ?6 X% c, z6 S9 K ask turtles [
8 G6 I8 o9 `+ b9 x if energy <= 0 [ die ]
1 z w3 q$ y7 H7 e6 V% ~ ]
& @- C/ V' t; S8 \: |6 z4 Iend
; T/ b# b! [" D7 p- X2 q C, D% Rto regrow-grass, m2 Z2 y' X/ f4 r$ c, e" ~+ F V
ask patches [
4 F' [ t1 x8 L, V4 l5 V if random 100 < 3 [ set pcolor green ]
& p4 [& L( T; u3 t* B( d ]& q1 e! o: C3 R, f8 G
end
! e# V6 I% R% e ato do-plots
( K/ E% q; M( x' c set-current-plot "Totals"$ j! c2 _$ h* T$ E$ f: g& [8 ?
set-current-plot-pen "turtles": W& |/ m& b2 o3 P' b# s4 I
plot count turtles, N7 |* y5 T; x/ P
set-current-plot-pen "grass"
5 V& B3 B0 A0 Y C3 B# ^ plot count patches with [pcolor = green]! [3 m5 B8 i$ ]/ A; J7 X
end' z7 {( S' V$ J5 @6 F
可是运行时提示no such plot: "Totals"
* }) V' V. Q1 o( W1 qerror while observer running SET-CURRENT-PLOT
A+ c6 T4 T' c1 I8 T4 ^+ P7 u called by procedure DO-PLOTS! x* C7 {3 ^) c* q
called by procedure SETUP) I- |7 M; e E( Z) \
called by 按钮 'setup'' b9 `1 q" T3 g$ F/ h
求大神解答啊 |