我编的程序如下turtles-own [energy]
6 e, c* [6 T# W9 h6 d9 M. |to setup
1 g$ y* ^5 m+ |7 E8 g9 `0 l# ^ clear-all1 P) C- J, c6 N+ u! j
setup-patches
1 D! x4 I, f+ u, F- W create-turtles 100! B, v7 L/ ]7 ]# \
do-plots# q& Y* `8 U' O R; l; ]
ask turtles [ setxy random-xcor random-ycor ]
( k5 K k% Z# q3 Lend6 I/ f2 U$ t" o- F& R
to go
9 y7 e; |4 t1 x: F5 h5 X move-turtles4 N8 B) F( f1 M$ `3 W9 q0 c5 }
eat-grass! _' Y9 p3 h/ M( u' s$ I8 l% t
reproduce
( [+ D! M% n3 v/ `: k5 z check-death2 K9 a$ }6 m' G. I$ |
regrow-grass6 P- ~4 i4 h; _
do-plots
0 F9 ]( R' d( dend. R4 B* r. G7 i3 P* t1 x8 K( V
to move-turtles0 U2 S# }* P' ?, J" H; U. a
ask turtles [! s* m9 U7 @# I2 v* ^# P
right random 360
% I" Q: j2 f5 h forward 1
. y/ E1 M' N& f) n set energy energy - 1# l3 m, c N* [& Y
]! U5 L, e/ }, a& L
end
9 a: Q6 r9 i0 k7 eto setup-patches2 w: b( {8 w( C! R" `
ask patches [ set pcolor green ]0 K/ }6 |: R- A7 E
end
+ c7 L0 b" g% `* ~& nto setup-turtles
6 _& \' S& U, f; e, { g/ B7 t5 | create-turtles 100
9 c$ K! i" L" f9 g P: V" o) F ask turtles [ setxy random-xcor random-ycor ]
9 ~/ n/ L. `1 D2 f, f# ~- S' oend1 f0 S" |8 _: R
to eat-grass( i0 O! B9 g' N! O, d- B. { @9 o
ask turtles [0 ~# q" s+ N9 H; K! V$ r
if pcolor = green [
4 t I3 G& C, H5 V, v. ^$ w set pcolor black
9 X" {5 a4 N4 p" ^ set energy (energy + 10)
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ifelse show-energy?
7 \: ^; v. N& i [ set label energy ]
( I2 I8 X% D- }' d; ~ [ set label "" ], l% ]# o8 b- P
]
# h5 P# R. @( u0 p; Fend
( [/ y* o2 o4 \* K8 f/ ?to reproduce- J& c0 X% E' J ?
ask turtles [
9 s! B7 A% _& V if energy > 50 [4 h9 @- A) m+ Q9 D- D- j
set energy energy - 50
! c. E ]* h7 d; u+ t) V0 g0 { hatch 1 [ set energy 50 ]
& b6 s) j$ d; p5 Q ]) H* w! F. q ]* ?5 |
]6 P& ?, y p* N- C, J! z
end3 ]3 O; y5 z6 ^' ]3 i# I! i: I
to check-death
+ B, D: D5 b; u/ u5 O6 ]0 u ask turtles [; ~8 e) `6 ~. P" N$ `
if energy <= 0 [ die ]: c( ?8 s$ b4 l1 x7 ~9 n" `: [
]. T( h" t, p0 D! W6 ]0 W4 Q# x- c
end
- m! K- x$ n: Y, mto regrow-grass s% |) P; M5 P: [1 o
ask patches [$ B1 P6 ]4 p* l$ W! H @
if random 100 < 3 [ set pcolor green ]
4 S1 {, Y7 y7 S* \3 A( L/ L ]
# z& u) d' Z0 @1 L+ E: c7 Dend
+ u' L- h7 k) {/ B& Lto do-plots
; g1 h3 o2 E }3 | set-current-plot "Totals"; e3 z' B" e0 C4 z. M8 F+ ^
set-current-plot-pen "turtles"
' ~. m) W5 Q F7 W$ U8 I4 h6 J/ q+ z plot count turtles# J5 I) ^8 _8 ?$ ?, h
set-current-plot-pen "grass"/ ?( D2 m% g( N) P5 m
plot count patches with [pcolor = green], {' l8 ?" E! u
end, W2 |* C: h5 ]! U- P
可是运行时提示no such plot: "Totals"" Y$ C3 o) C9 e6 ?0 g7 n# a
error while observer running SET-CURRENT-PLOT6 L( |# Q- e7 F! ~) q
called by procedure DO-PLOTS
, S2 ~5 b, q2 c called by procedure SETUP2 ], |, d+ b- T& _* W) a# y( o
called by 按钮 'setup'
9 y, v* j9 Z* ?, m0 ^4 P9 n求大神解答啊 |