我编的程序如下turtles-own [energy]5 v% z4 j* q3 B+ d5 _2 W
to setup) B6 s% b h- ~: i! N
clear-all
8 v" T8 ~9 T) b6 I8 n- ]3 W setup-patches) p8 U9 l9 T# Z" S/ G
create-turtles 100
& S6 s+ H3 j, }4 ? Y do-plots
6 t- C1 r* v* ^8 H7 y7 d& {- f ask turtles [ setxy random-xcor random-ycor ]- i1 m$ B) O: q0 G: ]
end
+ L- ~1 o7 _$ W$ W. m' \1 Zto go
3 g v& N- X: j$ `6 { \* Z move-turtles. [, Y: {5 r2 |
eat-grass1 H8 A' Y% F9 f1 F% t0 H
reproduce
. Z' N3 z" r/ c check-death
3 C6 O$ w4 K& [3 e regrow-grass
0 [( V3 q( Z' O& x# T# \ do-plots: u, w: ~4 }) z8 B! |2 A
end
7 P" I6 ~8 L; Y( V8 ~5 M4 I' eto move-turtles
2 g. ^1 D# Z# e# f( x {( b ask turtles [3 }! B: I' R& x
right random 360$ w' ]& f2 c( [1 u; Z3 o( H
forward 1
' u# Z" G7 Z) V+ _4 ^ set energy energy - 1# ]' {* D5 a$ ^5 H
]
, n, h @$ ]% E& |end
$ c4 S) G0 `& z+ a% l& f7 Uto setup-patches
" h" Q3 {9 |$ P: r+ a3 |1 q1 J ask patches [ set pcolor green ]$ h/ D4 _/ q0 `1 |
end7 \) P5 t5 Q3 B4 r% x
to setup-turtles5 I/ v& g& l2 @9 \
create-turtles 100
2 ^ x( Q. z* F1 J( g1 V ask turtles [ setxy random-xcor random-ycor ]0 K# W8 o3 R; i( m4 Q7 ]
end
! q1 H W% Z! T" \0 j" v* ?+ R- q0 ~to eat-grass# P) A/ a, ] ]
ask turtles [+ a7 m7 a4 u$ i; E$ @
if pcolor = green [
+ ^, U! e% p( J set pcolor black
9 W9 ?: b0 k" C2 Q9 a$ [" _ set energy (energy + 10)
( K0 U# W% a* I7 M; G0 t7 M# o4 C ]$ S1 {5 {+ u4 M( z/ J7 A
ifelse show-energy?
: F# u: i" M8 _8 B1 | [ set label energy ]
9 a+ B1 v' f6 q3 z& w- k) q [ set label "" ]
4 b3 z4 c" r! j6 S1 O ]
% w7 d+ c' i( L/ p3 n7 I, tend
9 x& _3 q) F8 N9 {5 Oto reproduce
5 |9 M3 L) f6 p7 D. W* | ask turtles [% s$ b) D8 G- V- u
if energy > 50 [
d. R: }( e4 y: S4 ?9 H; p set energy energy - 50( S, Y# j& O9 N" N# D% l2 p
hatch 1 [ set energy 50 ]& n. N7 z9 U3 c
]
6 Y" S" ~7 u7 \3 `* ~% v ]
& |+ j. L, `) p" a W; Aend3 o8 Y+ P8 B+ b& M
to check-death
1 K" e0 W8 s+ c) G" L ask turtles [
3 {2 I, s$ ?( {: C% o# J8 f- S if energy <= 0 [ die ]
" P9 g. a2 ?8 o8 E: j2 b1 D ]: [: W7 z) X! Q, ]
end5 G; T3 `) m5 S
to regrow-grass# _+ E/ q$ K/ b( ~3 f) D/ u* T
ask patches [+ r4 {0 M/ I) _' y! |. V* b! f0 `
if random 100 < 3 [ set pcolor green ]. j( F$ p2 u- O8 ]0 C& u# u- [$ @
]
4 E. U& d7 F7 ?+ B5 \* v+ Z7 u* send
, L; ^; y9 }9 O5 Xto do-plots
2 _; v; G' Z4 g: N4 m set-current-plot "Totals"
( i" y( O5 L: D( N* U' U8 ]0 a! n set-current-plot-pen "turtles"
* N+ A, Z7 l a1 f plot count turtles2 [, n7 W& {+ K& D& T6 u$ s. C) \
set-current-plot-pen "grass"- Q4 R: R9 C% _
plot count patches with [pcolor = green]1 z6 U- }, B9 D7 o% |5 a1 r' g
end+ N. s: c: O( |( ^1 O, [
可是运行时提示no such plot: "Totals"
7 }. l$ {7 l+ v; `) Derror while observer running SET-CURRENT-PLOT
' Q* j: M! O9 _9 o$ \, B called by procedure DO-PLOTS, u- k" e: q2 f1 m& e
called by procedure SETUP2 ^/ b, B/ Y1 b' T
called by 按钮 'setup'& m( T9 o+ Y; J
求大神解答啊 |