我编的程序如下turtles-own [energy]
: l2 |' l/ i% g, \) Fto setup
& I( g2 ?/ m4 w9 \. _7 ^ clear-all
; d$ K+ j. u. l ]4 \4 t setup-patches5 W6 _# D% S/ h8 g, V
create-turtles 100
4 O- ]# Q1 [8 H7 b do-plots& d0 v& ^. r- `+ ~ C! g
ask turtles [ setxy random-xcor random-ycor ]
Y% `4 Y- f2 E& Z7 kend, G: b" F! [* A; A
to go
) r N1 Q# ^4 r! o( t move-turtles) q" m& H$ q5 b
eat-grass
" f* f, `8 t) H reproduce& b! ^# b3 F9 d& @1 x! w' m+ A
check-death- N ^8 |" ? P0 i5 w" m% J
regrow-grass
& V5 X& ~& A) O do-plots
" z- @; @+ I8 f9 o+ Uend: L W" u; ^4 X8 s; a! h" J
to move-turtles; Q9 Q% B2 D9 x# f3 r8 h7 R
ask turtles [' \- x2 N. t; K2 {; w" d) Y1 w
right random 360
" }4 l+ q7 _3 J# E& V- a forward 1
]6 a: \( Q2 Q% a% i set energy energy - 17 b) N* w4 |* n6 t' I
]
7 z* H, p) r. F' k6 ]9 x+ }0 ^end1 c6 b4 V7 m5 F! P- x+ _4 Q
to setup-patches/ b; \1 G- }3 v2 i2 p, Q
ask patches [ set pcolor green ]
5 g! `' E& r* D1 }3 P4 {' Dend6 G9 a: x. u2 l3 e- z0 @
to setup-turtles8 T: o1 }! U# P( X, b
create-turtles 100
l C( t7 x! S ask turtles [ setxy random-xcor random-ycor ]* T, U, e( _; S% X( U7 l
end
4 _/ N2 K. D4 R2 k2 i% r! O& ito eat-grass3 G( U: S# Z9 d7 ?* F
ask turtles [ l/ i. a! T* G1 u7 ~( F) A
if pcolor = green [
( M* k% y! j, ` k& G set pcolor black
. W: C# S3 l7 @: d1 k6 k! v1 A set energy (energy + 10)
4 G5 j- h2 \9 R# {- J ], H0 H- A9 D& `8 ]. L! Z9 x
ifelse show-energy?
$ A( d% G# i! D% {/ W [ set label energy ]
: n2 ?! u: Z5 u! ]' r [ set label "" ]
- z, k2 V0 \+ u$ r9 w ]
! [, Y9 ^3 N# N; pend/ s: }& p4 j+ J
to reproduce9 E4 f/ m; Z& @0 D$ m
ask turtles [) ~: b$ t! \+ N" i, X3 I0 B0 `
if energy > 50 [
3 X: X ]4 y+ r: ^ set energy energy - 50
- i+ \: G2 i9 t* a# T) @ hatch 1 [ set energy 50 ]4 G6 ~" ]/ t% a0 K9 F" \+ B
]) s4 L, P/ I& J" g: ~! G
]% ?8 u0 ?* R! z
end4 H8 ~0 Q+ ]; s0 F
to check-death
2 O z5 N2 s$ r% n7 { R ask turtles [
) n5 P/ X, `& a" }+ Y3 q. g if energy <= 0 [ die ]. f" T- K# }$ }" L
]
, b% ^$ n: P* y! G3 S, [( {end
4 I: J* [; R) ?/ g# M, B1 hto regrow-grass
& l% ]8 d, j! G ask patches [" y1 L: {, L u4 m
if random 100 < 3 [ set pcolor green ]
/ R# H$ @4 p6 D* c! y ]( `- `7 K! `6 g, ^( f/ E: Y5 c
end
* S9 |0 T( ]! J$ O: S R( B9 Y+ Xto do-plots9 B/ A( K; ?! v k5 W+ z5 y
set-current-plot "Totals"
7 _0 m0 {" i- k$ T! G9 b set-current-plot-pen "turtles"; w$ j; s- S0 w
plot count turtles4 Q. d$ T+ P. ?; s
set-current-plot-pen "grass"
6 h. P3 @. o* O plot count patches with [pcolor = green]7 Z- K* m) p% e `9 o2 F( ? W$ F
end
, q; ], Q# M4 D( t/ |可是运行时提示no such plot: "Totals" k2 e+ L+ @, {. C) }
error while observer running SET-CURRENT-PLOT
; g6 m7 }; h0 v9 F6 t: \6 a; ] called by procedure DO-PLOTS
$ |3 p$ v o$ j* |% d) A called by procedure SETUP q% |4 t8 L+ J* p+ j0 a
called by 按钮 'setup'! E& a6 }/ R! a }$ \& l; @- T
求大神解答啊 |