我编的程序如下turtles-own [energy]
# E0 Y( L! d8 z# W- }: [# W- t( cto setup% E: n# p" @6 w* h$ W3 H. U
clear-all
1 \) h" a, W" M0 \: M0 t7 z1 O setup-patches+ s$ l; _( q6 w! W0 i1 M
create-turtles 100
+ ]6 h# f' n |+ E# Z) D3 Q0 J- ~' B do-plots
! I. B! j0 H+ p, r: X- Y5 C ask turtles [ setxy random-xcor random-ycor ]
( y6 c5 l8 H7 x( X: send
* F6 e; P' L* b$ t& xto go: q. z6 b' X) k% c* q) J
move-turtles
2 N9 [9 |$ S6 ^, Q( t/ J eat-grass& Q3 @+ r# R! V2 d, h
reproduce0 |; m7 r6 r9 J. x
check-death9 g9 E. n) w% Q8 j7 H8 _
regrow-grass9 x0 ~) S$ Z' i, f/ m0 h
do-plots* @, l8 r0 w+ H; M+ K L; o
end: h: I- P) c' E8 q
to move-turtles
, X* E6 u/ G. ~ ask turtles [
. A* x: ]* T v3 _- ~4 b right random 360
7 B% E5 v! M" G% W- \5 }& N( }- N forward 1
1 A: D2 q2 c; p3 {8 I set energy energy - 1
) I* z! _% Y6 E. U! `& i5 |, u ]+ D" J3 x- ]" V% W$ H7 J
end
& b) I5 e T- p# Q) h0 Yto setup-patches8 r& w( O. Y! l1 D4 {1 U# y1 |
ask patches [ set pcolor green ]
t v1 p- c/ C" }/ Q% Hend
) D. M6 B; Z H6 Lto setup-turtles6 X8 G( t$ E- w8 A g$ h9 K8 c2 ~
create-turtles 100
5 A3 P; Z/ d$ Z& C1 V/ a" F' i ask turtles [ setxy random-xcor random-ycor ]$ I ~( |! M+ h) C1 q. ^
end
" w; z! X! b i! Pto eat-grass
- k$ @- Y8 P7 ]7 L ask turtles [8 M5 Q. ?5 l) R ]$ Y, f
if pcolor = green [" m e; G4 A. {) M
set pcolor black9 H, O% O: d ~8 G, _* q
set energy (energy + 10)
1 {7 n2 Q6 A# N ]
1 y# z4 B3 p! x+ e' q: U ifelse show-energy?% L5 R0 [4 X. r8 o7 T; }+ g( `
[ set label energy ]
5 U' W8 W4 U$ `% p+ E! o5 D" u [ set label "" ]3 X& N$ B8 q/ B/ \
]
6 j" ?; Y6 S1 m) D9 V" Uend) f) S) K2 f( X7 ?7 @ v7 a
to reproduce% s8 r; V/ O$ {' f# G, m
ask turtles [
/ Z( I* N) {" h9 z; w- L$ \ if energy > 50 [
( z: b1 M- a% f2 @, O, c" v set energy energy - 50
" @7 y. u. N! K7 s hatch 1 [ set energy 50 ]' x" X0 f2 r! j ~/ T
]' x. M" o* X$ U5 H+ e. q
]. ?$ y( ?4 g: |
end
8 a3 i" y0 U9 \5 U9 V4 xto check-death
- }7 Q7 j9 w- s8 w5 V" U/ z ask turtles [
7 L. ]6 m3 l$ w- e0 | if energy <= 0 [ die ]
" Q% U6 [( `5 Y# v5 Y1 ] ]
" P- `! A* h4 @' R- H2 M2 K, {7 yend+ }- X0 f1 Z h& v1 x
to regrow-grass& Y# @' R g& X d* }9 ]# p6 S( ]
ask patches [: O- d+ _6 D3 J+ T/ r
if random 100 < 3 [ set pcolor green ]
% [% H- o% G& G Z2 l# [- K( r ]
& x f3 Y) z! I( X5 a5 e- ~1 Bend3 R/ Q4 c+ R8 V( [! W9 `, N
to do-plots
! O4 ~/ p9 }/ M# V% B1 W1 G* ^ set-current-plot "Totals"( R* K* j+ T! ?1 K# I
set-current-plot-pen "turtles"
' q/ v0 o1 y+ n9 M+ ~6 `6 Z plot count turtles
1 c& d0 N9 B: X5 C3 ~* x8 q7 Y( y set-current-plot-pen "grass"
, D. L: q; H# o! d* n plot count patches with [pcolor = green]7 ]6 ~( b3 w' ]
end: d5 T7 D4 [+ _$ a' N9 c
可是运行时提示no such plot: "Totals"
! ?" S Q( T! E0 i: lerror while observer running SET-CURRENT-PLOT0 U F- ]+ V0 S# w& q- V: ^1 a9 h
called by procedure DO-PLOTS
3 i Z3 c0 L9 G) u Z, [ called by procedure SETUP
1 ^4 j# ~: I: S/ V called by 按钮 'setup'5 @; m1 l( ?- a( }
求大神解答啊 |