我编的程序如下turtles-own [energy]
& L; f1 n: n% g2 yto setup
) ^6 g2 Q- ]* c) u' z/ [( c( U* q clear-all6 B+ h% n$ p" i4 e
setup-patches" W* @, I; A3 g
create-turtles 100
9 `" z0 B, C1 `9 s& K% | do-plots
+ D+ [3 K! q: P( n4 ` ask turtles [ setxy random-xcor random-ycor ]
- ]) Q8 r9 f/ \. O/ `7 Iend/ y" s% o" H' p3 m- p7 h) R
to go
/ S, F `2 O* m* A# v move-turtles
, `8 H# z/ D+ ^0 a# W6 s eat-grass
- K$ m' O/ }' `0 ^7 ~* ] reproduce! l: G. E; S. F s2 [
check-death
% u4 S5 A' [8 c5 S6 n. W; A regrow-grass& i8 V, j. u9 B& Y+ m$ Z
do-plots- i4 o* @# Q4 w1 c4 b' f& A
end8 G% a0 i9 x5 J! V, i4 a, a7 C
to move-turtles
# C; e4 A* y( v& l7 [+ R ask turtles [( L' n1 p4 p, k+ E8 \ `
right random 360
: O; M% e; Y' \8 n! Z forward 1/ S4 G. s% O/ a
set energy energy - 12 H" f" p% B& M3 p) Y) ]/ c: ?
]6 E' [0 r7 `; t6 S
end
q1 `+ q" g) x. H$ a) Mto setup-patches. H" O: N9 I5 t+ Q( a4 U
ask patches [ set pcolor green ]1 _. c2 Q- X2 Y, E, S( `2 h
end
: K! `( u" U" Wto setup-turtles
9 L. E$ m9 p. r3 q/ q7 A: f create-turtles 100
3 q+ B( w; x+ n/ _ ask turtles [ setxy random-xcor random-ycor ]4 s4 Y6 h2 f6 @- R! f9 y) i, n; T& Z
end
5 R# c, \, ~3 I7 q( D& ^" H$ pto eat-grass
5 ]0 ~, t! I" l! J ask turtles [8 Q F& G6 ?4 z$ k9 G
if pcolor = green [
0 j7 [$ _. v+ e0 _2 T9 | ^ set pcolor black( T. g0 g: h, Z% C+ Q# B
set energy (energy + 10)- M) a6 |% r9 L) E
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ifelse show-energy?+ M6 J2 k4 H1 b5 Q. O# y' ]( \
[ set label energy ]& T6 r; g, ] i0 J
[ set label "" ]& q9 {0 h0 z/ ]& U
]
/ E* R/ k3 f0 vend
4 }6 F( Q4 J1 j \7 l' e0 dto reproduce
. ^' F, H0 {6 I6 J ask turtles [
$ x2 q7 r8 Y8 E: F if energy > 50 [
% U5 z; o3 y0 a% s6 h* h5 R set energy energy - 50
' V5 C, Y# A5 _& H$ N( e hatch 1 [ set energy 50 ]" C, E0 V8 s1 P1 a* j3 V
]
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end9 P4 F% q A$ U2 a7 w
to check-death. x0 T5 t$ Q, W! {
ask turtles [
! C) _% |* V. F# L if energy <= 0 [ die ]9 N+ M6 j9 V6 k0 U& p2 |
]
# Q0 \1 m& j# Z2 P7 F% send0 @3 t" c: `/ J% ~$ \& {+ p4 g
to regrow-grass
8 A4 y3 I& Y! G& B2 h6 u ask patches [
4 b& s1 q2 n0 s& c% _ if random 100 < 3 [ set pcolor green ]
5 S v% P& c* `& X2 P5 T ]) O- o3 a* s4 d
end
) ]9 m; U3 n. x. u3 ^2 s9 dto do-plots& h M$ O6 {+ A: g, T: M
set-current-plot "Totals"
( U. w2 A: w( T" F" h1 M5 j9 L set-current-plot-pen "turtles"3 i( T) \# H6 T6 u& Q/ B0 e
plot count turtles- \' I. E8 |/ ~: v/ Q. `( s8 K
set-current-plot-pen "grass"
& @( @! {) e0 f plot count patches with [pcolor = green]4 w. I- [5 l& f N( n& ?# Q
end1 R. \/ n5 Q q6 F
可是运行时提示no such plot: "Totals"
) R. E. Y2 t! u& _- J5 jerror while observer running SET-CURRENT-PLOT4 P+ ~8 X" t' Y( x; R1 s' x
called by procedure DO-PLOTS
5 {0 A3 y$ S) g2 M# H z- ` called by procedure SETUP
8 D0 W) B" T6 |8 _! _. z! N3 {$ | called by 按钮 'setup'
/ o+ J( D2 W- p5 m求大神解答啊 |