我编的程序如下turtles-own [energy]) y- U# X+ H# f' X+ \
to setup" \" P9 `' E, r2 k+ v( \
clear-all) u9 J9 w6 ], k0 b2 J8 ?- J
setup-patches
- d* |2 f3 v3 a# s6 j& D create-turtles 100
; f: C+ n/ Q0 U$ m X do-plots
5 A ^: ~9 U7 J2 z5 e. A' V ask turtles [ setxy random-xcor random-ycor ]
( W' d- _+ o8 W0 z$ N$ aend) ]1 V, X3 |' y$ ^
to go2 ~5 m1 W9 t: w, x5 M, z
move-turtles
2 {1 Y: v! S G, r. i3 R1 G eat-grass
: }% M; E1 [. o( B5 J reproduce+ u" Q& y3 b0 M
check-death
3 T% R+ v6 m& R8 L7 D regrow-grass4 B2 g6 k+ y# [8 g3 U
do-plots
4 k1 F# k. R0 {& e7 ]+ _) ?% ^end
9 _! o% H( C; t* ~to move-turtles/ y8 M3 S; T$ W/ m' B! |
ask turtles [
l$ e+ t5 V9 V8 H5 n' C+ s right random 3604 F4 F) i* D* `
forward 1* I9 m. j c* q* m
set energy energy - 15 A* o7 v2 f4 b* g, n0 H
]6 D+ g9 y- h2 H- L
end9 U" j) ~- k& f! H4 R
to setup-patches2 }, I& D: k# ?+ F/ A$ V
ask patches [ set pcolor green ]' g; k& [+ `- E2 A+ X2 E! P
end+ `0 o9 T7 S% d* j9 y; q+ i* P& v$ D
to setup-turtles1 S$ I4 ?" u: l
create-turtles 100, [" L2 d3 E4 w m
ask turtles [ setxy random-xcor random-ycor ]
& \, K9 E- U, |" P7 K6 Hend
) M+ P- E! k5 p- H5 _to eat-grass) _ j9 ^7 g' E* l s1 n. K, Q
ask turtles [
: |# D0 R' }$ a1 B$ E2 Q if pcolor = green [
, J4 q J# t( j% i. D g set pcolor black2 R% q- Y4 U `
set energy (energy + 10)( J; ]% P- C1 l3 f0 q; _% E
]
! w8 {" z6 k% Y' y0 Q! n. e8 s ifelse show-energy?
2 }, B {6 u, B' s4 Q/ M! G+ c [ set label energy ]1 j. `* D; S8 z1 e+ N
[ set label "" ]
1 _$ a- n3 m3 z8 v$ g+ ` ]4 z, c; y$ g! ]$ y& S1 T+ ?% w: W
end
; v7 s2 P# G% H' o) `% @to reproduce/ V. e# H- A9 @" z8 T
ask turtles [
+ Y$ j8 |9 E; |$ X0 Y if energy > 50 [
l+ O8 J4 Y4 j, l# I2 Y set energy energy - 50
$ r" C' r: a' V9 y% m5 V, m" O hatch 1 [ set energy 50 ]1 Y# Q0 @% H# I2 @3 G8 f
]+ M u- S( W. X
]
6 x2 k3 u" E" U2 h( tend# _$ n* r1 K; z0 c6 b t* {5 ]6 w
to check-death
& u T X) X6 x ask turtles [
3 j5 C- {% E1 U7 V# s) c( r if energy <= 0 [ die ]
/ O, i4 H# t, |9 ]9 h0 [ ]% U! L+ u6 y- h% q3 p( q9 y
end
3 J. [0 J9 w5 i/ [$ h0 b; O: Eto regrow-grass: c4 B- x1 p$ Y6 D. Z, i+ {) O% }
ask patches [
( y5 U/ V# }( N- C# Q- G8 P l if random 100 < 3 [ set pcolor green ]" a( G7 G+ L- z% }
]% x* B) P0 c p7 @5 F
end! F1 b# _& K% U: y- f
to do-plots
1 r- X7 G5 f8 @ set-current-plot "Totals"
& t9 [( P0 D/ V$ ~" o set-current-plot-pen "turtles"
0 |" k3 B) {7 P4 h) [8 [( V plot count turtles
0 U* e4 I; n" p4 A$ ?, ^9 `1 `$ q set-current-plot-pen "grass"
% S" H' E) J# A( P2 k+ O d ^ plot count patches with [pcolor = green]
1 l2 m! D: U+ I* H8 h# r4 Oend
$ \: X+ p2 C2 L, n/ E$ `+ _可是运行时提示no such plot: "Totals"8 n' }& r* D9 q1 B7 c' O0 a
error while observer running SET-CURRENT-PLOT
' h+ w: d, b) x0 q* X" {/ I" \ called by procedure DO-PLOTS
" H5 n* r8 M3 E0 b- J k" Y called by procedure SETUP
Q5 t6 Y7 D* o* @& _* a; B/ _" R called by 按钮 'setup'
6 ?- q0 j" u* P9 a求大神解答啊 |