我编的程序如下turtles-own [energy]- K6 ]. f. B! F5 D7 p. x% ?2 u
to setup3 l) b% g, e3 O3 }( f" \
clear-all
4 n2 K3 b- R* r setup-patches9 ?. A3 p( j% A
create-turtles 100% o" `; M! Y6 o* ^' L
do-plots2 d2 o4 a' e$ e% k
ask turtles [ setxy random-xcor random-ycor ]+ a% j I% c$ U# l8 l
end1 Q& T+ c2 X7 o+ q; d- r4 X
to go; A2 a2 V, z. I$ z
move-turtles& X; _; P9 \- h [; Y9 ?
eat-grass/ @6 ^& w* N" y# A }( }6 Y
reproduce
- e# ?( I# H7 [- `. \6 f. Q, T' P check-death
* w2 I7 S" d1 y' G regrow-grass4 X: k; ]- [ R, n! h$ T2 D
do-plots
. H; F- J% Q6 v* Y9 d5 Eend
0 X2 d/ F( Q; _4 R- O, hto move-turtles
/ u E$ e# b, }. n# T# ~ ask turtles [
/ \8 i% j+ I- A7 l o& |$ R right random 360
1 `. h7 j- r- A0 W3 \" j forward 1
3 r1 _( C) M( E, i set energy energy - 1
6 j- u! u6 E% l ]3 ]- _; C* Q4 X; @- f' K
end% d1 }' H+ u, J9 v; X' j
to setup-patches1 F6 g! X) G9 b C3 E
ask patches [ set pcolor green ]
! \* u4 P7 @8 [7 Jend
, I6 g5 y1 c- F7 Q- c: K8 n7 tto setup-turtles. G! ?& \1 V" {
create-turtles 1005 w7 Z1 e( `; M9 T+ E: E$ \
ask turtles [ setxy random-xcor random-ycor ]
/ b- @6 B/ r( C5 x* qend- q2 k$ A; @8 d' l" v* _0 x
to eat-grass
% c H9 ^ i/ `' f ask turtles [
5 R/ u( r" `' {3 \ if pcolor = green [7 K2 i/ q; U( ]' V; R
set pcolor black. Y% ]& Z6 P; `
set energy (energy + 10)6 Q/ B/ e2 n" Q$ y2 v7 E
]
* q4 b2 Z2 ^% \9 m- m4 L, y! Q ifelse show-energy?
& @& J3 ~! J' P3 F) w4 Y6 _& U [ set label energy ]2 r( _* U% X: d% z. N2 R
[ set label "" ]
: g u8 n/ ^$ |% S3 v# q: F8 f0 b+ g ]: [" N9 e( o) o
end
: P/ U5 C4 ~& H% \to reproduce
! Q0 V. A, H: h ask turtles [, m- N* U' J" U
if energy > 50 [5 @: r% B* d$ x( e, {; N: r {
set energy energy - 50
9 _% O- q9 x# @9 q0 | hatch 1 [ set energy 50 ]2 ^% Y% o4 T! ?
]
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end
$ q0 e2 x0 s0 tto check-death- B# L- R7 }2 J
ask turtles [& i# ~) ?: p" r. h" v/ y0 o, B5 |
if energy <= 0 [ die ]
# s# D+ |! T3 J ]
& i: f+ o9 A$ \9 C- yend7 d2 s, v1 J4 D* y+ ^& l v! a$ B6 S
to regrow-grass3 C8 b# E: N3 v0 e
ask patches [( k: p) ?7 E5 j: ~: f1 l9 w
if random 100 < 3 [ set pcolor green ] ^9 O5 C; i' u: C# ]
]
2 i% @0 c' \$ |) nend
! B$ F. E1 T& j" E5 U- A# nto do-plots
! G- @& w- @# r9 C8 D4 C set-current-plot "Totals"
+ X% Q' z0 U9 w4 Z7 g0 ^9 h- ? set-current-plot-pen "turtles"
3 @+ @0 y4 D5 d; X7 O6 U plot count turtles
* A7 t" R& s/ x4 j2 F4 J- w set-current-plot-pen "grass"# I, d+ g3 F6 L: |1 w$ Y6 o
plot count patches with [pcolor = green]
# F; D8 u0 q/ rend
* X$ t) O" l& t! P' {" J可是运行时提示no such plot: "Totals") A# k" T& B5 R0 Q5 [, o
error while observer running SET-CURRENT-PLOT/ i4 J$ [' K. I* b, H7 k% }
called by procedure DO-PLOTS9 X. m) d8 W" }+ G- }- s7 X1 l+ J
called by procedure SETUP. K( h2 G* l. [' L2 W
called by 按钮 'setup'' Z1 p! Q) l- [. ^
求大神解答啊 |