我编的程序如下turtles-own [energy]
$ I C8 y- A* S2 ~to setup
9 f# T; Z! |( e% a clear-all
5 n& Z/ C& y, ~, J$ t setup-patches
/ ~; M# A8 h& `$ y create-turtles 1004 }& g0 r% U! V# X) }
do-plots
: x7 h2 ~0 z9 S Y! a9 I& {* |% \ ask turtles [ setxy random-xcor random-ycor ]& }, Y, [# K; J1 u- w& ?
end
' G6 P/ p/ \/ g0 S! W% G1 Qto go$ X+ ~$ r9 i( T _( S: Y3 E
move-turtles, G2 m, b* m2 |$ I5 `
eat-grass4 R$ v& k' B3 o9 A# M. u
reproduce
9 G7 @: A+ A& G$ z4 G check-death
* `2 y+ ^; B; t, ~ regrow-grass
; Y' t1 D! j- f' U' T2 o1 \" C do-plots% B2 X4 ?9 K9 q) y7 X) e
end8 g$ J" ?" h) P. }/ c
to move-turtles
* R* y: W8 y# L; A ask turtles [
. H: A1 X) u5 |3 T% l6 b" z right random 360
) W) R, ^$ N! Z/ } forward 1( p( t) k$ O! [5 g# F
set energy energy - 11 m8 [+ f0 U& b5 I1 |' p
]! B! ~& |; J2 j+ _
end
( I; _$ [8 A6 R" m1 I1 Kto setup-patches
& j9 ^, C4 W. D- C1 N( @: l ask patches [ set pcolor green ]
9 s" z7 n: X, h9 _; [0 Q, Z ?3 Tend" _( U/ z+ n A
to setup-turtles. h' S7 [2 c# B: d+ c
create-turtles 1006 Z& A3 @6 _6 T' y; X+ g8 W% Z
ask turtles [ setxy random-xcor random-ycor ]
% G- v6 o7 ?" {, s7 Qend
4 t: s" ^+ }/ K0 x# yto eat-grass6 I$ d* A$ K, e; A
ask turtles [6 \' h) @4 H6 z& h7 \
if pcolor = green [
9 ]2 x6 T) [, N7 F$ ^+ X& C! \ set pcolor black2 J5 T3 R/ F: Z1 c
set energy (energy + 10)
7 ^ x: U, J: B0 Y3 X' G ]
' N g# S# y$ p# X& T ifelse show-energy?1 O9 h( v- _0 z3 n" Z7 L4 L
[ set label energy ]
1 y7 C2 \$ J4 f5 m j. a- M' O [ set label "" ]/ i' N! t* U4 R+ K
]# Z& z% R, i; B+ {0 V
end0 K2 r8 ~- {. R6 s" ^8 O
to reproduce
+ O" @5 ^7 ^3 }& G& k ask turtles [# P; I. l8 C" e" a! L" _8 j4 O* \
if energy > 50 [- e u0 v, s/ |( \, Q6 a
set energy energy - 50. `- M3 s [7 H5 C3 ~: U
hatch 1 [ set energy 50 ]
o# [; t; e4 t" ^: [4 V3 z ]: T! t7 [9 D7 C
]8 V4 p) [! B; N+ P6 j5 }6 N" B( H
end: V: J( Y, s: D6 Q, d: L% V% P- o7 `9 A
to check-death
1 U/ {6 O+ \% @1 p5 F5 K% d; N& S+ z ask turtles [
8 ^8 \0 E$ x7 z* ]5 S0 Z' ` if energy <= 0 [ die ] F+ ^) U; o7 O' B: X- q, H
]) F# a$ K% ^9 a$ {, Z
end
+ {& {2 ]# j6 w1 ]. Pto regrow-grass: `$ d" ?6 P6 K+ }' y, a5 L: ]9 M
ask patches [; O* o% q! j6 t$ H) h" s6 ?
if random 100 < 3 [ set pcolor green ]. K% _& G# T- I; J
]. u5 y( S: U1 [" q
end
1 Q9 v5 U T$ D d* z$ X/ ito do-plots) `! U3 E8 B( F. z
set-current-plot "Totals"% {; c* I2 S4 |
set-current-plot-pen "turtles"! `( i( l# c6 ]8 V
plot count turtles! e) }3 ~! C, V- e
set-current-plot-pen "grass"
8 E3 w5 D9 ^' w8 R2 r- P- E- R b8 A plot count patches with [pcolor = green]
( A; F( H, u* J2 x- X3 pend
' F( @) \" q( X1 N2 W3 B) X可是运行时提示no such plot: "Totals"
: ?3 b' Z% t2 p1 U% eerror while observer running SET-CURRENT-PLOT
! N# i5 G& D1 ?4 `, `! C' ] called by procedure DO-PLOTS
1 h$ ~0 f7 Q$ Z ?* A called by procedure SETUP$ A3 Z4 T# g7 |/ P2 V
called by 按钮 'setup'0 y# ]5 ?2 C& P5 H% W, g T2 n+ A
求大神解答啊 |