我编的程序如下turtles-own [energy], ]+ g2 c2 ?3 Z( e3 a0 \
to setup7 T _6 b2 I4 |7 E4 |
clear-all
4 d1 p% Q0 ]3 X- s: ^9 { setup-patches
! D0 f* F7 w. p/ n, l create-turtles 100
3 O% O$ l5 D4 b L' N do-plots
' T' Y9 f) n& i N4 p3 ` ask turtles [ setxy random-xcor random-ycor ]( n; b0 Q+ d; k8 g' K0 K$ ~0 q
end! f* e3 w7 U! s8 a9 o6 w
to go
! z4 k3 i% P" y move-turtles
9 H/ @- x3 L, y4 n% ^ eat-grass
. I5 |9 l( L! L T+ z& P, @ reproduce% Z9 F2 x2 _8 x& Y: \
check-death
: s- b* y9 e' ^; c" b( e+ T regrow-grass
- G ^0 q/ V3 {8 l* Z9 [( z do-plots$ R" R, \* B6 Q0 B; f2 V- k# ?. @5 ^
end
( D) P3 _' j/ ?% S5 Ito move-turtles
9 I. P3 }9 G5 _* [0 U5 w ask turtles [4 i/ Y8 e0 ]; q; U% k# N: j
right random 360+ i) i7 m- K; _% d' U' J6 |
forward 1, I/ z8 v) H, z5 D, S
set energy energy - 1$ h& y6 s" b) m: y; X$ |( Q
]
& [5 y4 ?$ ^& Qend+ d& b3 a8 _3 M# R P4 e" s9 Q# X
to setup-patches; n, T, y* E+ C$ i* ~5 A! f
ask patches [ set pcolor green ]+ n; c3 r& {7 [+ {, ~
end/ b$ i3 ^- w) Z9 R
to setup-turtles
3 c& A& q! R- C* B- r9 n create-turtles 100! q; T6 t0 g4 R" z- u- i% R
ask turtles [ setxy random-xcor random-ycor ]
0 M0 [) W" ?9 b3 s3 M! B) @end
' v# ?0 ^7 o7 o' H5 o8 Mto eat-grass: Y, l3 u6 q) h7 R+ p* `& Y
ask turtles [
- _6 C2 e* h! ?9 H5 F/ Z/ O if pcolor = green [
- V5 J. B+ r' E) B7 ` set pcolor black
/ h( I: r M1 _ set energy (energy + 10)
2 M9 y, Y2 ]; u ] G! @7 e6 m/ V/ }5 J+ |& T
ifelse show-energy?
* J8 s2 Z- Z. c/ x [ set label energy ]
. g, L: Q$ j) L [ set label "" ]* D% n! U |( j3 ^
]$ L9 X2 v. K* a
end
, l* L( _6 L* V5 w& ?1 Xto reproduce
6 b$ @: v: ?# G ask turtles [8 ^( p- h( e( a5 N/ @
if energy > 50 [
( g) r) V2 H1 J' D9 b) n s set energy energy - 50( O E+ J2 P/ m1 i) O- ]
hatch 1 [ set energy 50 ]7 ?' W9 }3 R2 }
]8 o. U0 R3 z! R
]
, t- X8 S2 A) x9 n3 ?% M5 Lend
7 l; ^' ` o# O# ~2 tto check-death3 {( b2 j, R" q6 {- i
ask turtles [
* u( p, n% H& k. ?& S( s if energy <= 0 [ die ]
. R0 n4 r! L! V9 U, J: b7 X/ z ]
" L* J1 g! F* a1 {, E3 t: ]end6 {" _3 p# y& T9 M
to regrow-grass1 e! T, j# I- ?
ask patches [
0 l7 a) q/ J \7 q! ` if random 100 < 3 [ set pcolor green ]
0 q0 K F$ L+ o/ g1 v1 A ]( w; S2 R/ F$ R! }2 p0 ^
end
1 n! C! n, s- G' x. `* hto do-plots
- S1 Y$ W! U( c. t) } set-current-plot "Totals"
+ ~9 c0 M/ j1 Y set-current-plot-pen "turtles"# ^, v, a: ?! }4 ?# ^9 x
plot count turtles3 F @2 s9 f* i: U* t
set-current-plot-pen "grass"
0 V6 t) w) w- i4 s! h plot count patches with [pcolor = green]
& L. F* w7 R, @ ]6 L* X0 Dend
) Z9 f& Q" w" G. N" k可是运行时提示no such plot: "Totals"
2 J. Q2 `' r& Z6 j: N' w3 H3 [error while observer running SET-CURRENT-PLOT* b7 s( ?) y" _& L8 p2 I3 e5 [4 |
called by procedure DO-PLOTS
; H% G) V/ d' G0 { called by procedure SETUP
# i/ L" _% [, w+ Q called by 按钮 'setup'
3 o" r, Z( f* E# B$ q% a! Q求大神解答啊 |