我编的程序如下turtles-own [energy]
/ d: Q5 a, W- r# Dto setup9 B% ~) D% v0 [6 R
clear-all
& P" @2 t. e8 ?2 d7 U; r' B8 K& C setup-patches
9 p$ P5 }1 S) G2 J6 \$ f& i0 d create-turtles 100
0 w* x- L2 `$ R% e( m# z do-plots
% e( k- C; P8 t3 Q k* Y1 A ask turtles [ setxy random-xcor random-ycor ]* | O0 Y) M" E3 I
end
6 _' \2 @$ N% d/ t. z4 L* {! {to go( }1 W2 F) K, v% }, L! i/ d
move-turtles
2 @5 n8 g K) d K( @* r; q eat-grass& }5 X& N( {4 ~0 T! i- \
reproduce2 o- D% m% G1 \/ T$ Q. V3 H
check-death1 D9 a* o$ c5 K* e! r
regrow-grass' `6 D) p9 N( t/ L0 E9 ?
do-plots
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to move-turtles
6 \$ }; e7 B. s7 F ask turtles [
( ?4 v8 I' S* x0 c! v right random 3600 }2 w2 {+ [& Z
forward 15 H1 i; P: ]5 ^5 A8 j, T
set energy energy - 1! Y+ W( S7 I/ y
]) n/ s; }, k- G ?
end" S1 \1 W1 W& Q8 k
to setup-patches
9 g3 B) M! \, N9 I ask patches [ set pcolor green ]
* d2 U; S$ I3 H; Z& G h6 F$ Iend
# A' z: a# {( |2 kto setup-turtles
8 z6 K S2 p0 X& l9 X2 g- Z create-turtles 100
$ L' s$ F1 Q; y: T/ Z P ask turtles [ setxy random-xcor random-ycor ]
( \1 S" j: B+ u2 H7 {end$ ~2 U& }& }/ S5 W5 W8 g+ w
to eat-grass
6 g" ^0 ~8 G& b+ i/ q ask turtles [3 f; B* Z9 L: }( i: k8 _) P
if pcolor = green [
/ e5 o# j# \. m' Q8 w* [ D" B- m set pcolor black' S; A; j8 M! t" _/ i$ x+ \; w1 A
set energy (energy + 10)
7 q3 [6 Z0 F- _; h* C ]( }# C' P- t! h! A# G# ]; P
ifelse show-energy?
5 t& d: U- `7 w( m) o. r, @/ a [ set label energy ]
6 B, Q6 V! d# O7 G! S6 W8 F1 h% E* W [ set label "" ]+ F) b l' G+ ?' b
]( e* B% t. s# a6 k6 e& b
end
; {4 o) r$ d- t9 g2 l# J1 yto reproduce4 L3 \* C( B& o1 M( t, H
ask turtles [- e) N( |1 S6 a1 e: S9 z4 r- U
if energy > 50 [8 h1 ?6 ^2 ?2 {1 K
set energy energy - 50
! M% n9 H% M6 y" {0 D$ i2 D) N6 b hatch 1 [ set energy 50 ]% P8 y# j& F9 q, ?* ^4 g5 ]6 i; ~
]8 I, X% @$ V/ e1 {! n
]( ~) k7 ]- {, r; t5 U
end
' T4 g* J+ N- B1 w5 rto check-death
; b4 o1 u+ Z1 W, n+ \' Q1 L; C; E5 O# X ask turtles [
4 | o) B0 g% P7 P! e0 m( E if energy <= 0 [ die ]4 \# H5 l2 _6 g1 N, s! R: m
]
: X# ], v8 ^ S1 c( Z8 ?$ Oend1 l( c/ z$ j& H t0 Q8 N) b
to regrow-grass' A" r' x. j6 w
ask patches [) z$ t# j& L8 A# s$ c+ N
if random 100 < 3 [ set pcolor green ]
" h8 n0 T, l) K: Y1 H t5 a ]
# b, H8 W) F4 r6 t. m' @end: ~' c) R& y' K9 V5 b2 A7 K. h
to do-plots
" |6 y; B. K9 U! ]$ R set-current-plot "Totals"7 z) o |' _7 f& E. h1 _; s8 c
set-current-plot-pen "turtles") W) ~) u T* E* S& K6 l
plot count turtles8 r) l% [2 d! y! h
set-current-plot-pen "grass"5 A# E0 E) |/ a X. a: u! A2 ^8 e2 j
plot count patches with [pcolor = green]+ K2 f( j5 ]6 Z" S: [0 L
end9 K6 c' t5 ]: U( I' e8 P
可是运行时提示no such plot: "Totals"" ]5 X" X5 j7 o: h- h3 `
error while observer running SET-CURRENT-PLOT5 \' ]( d u7 C/ {5 v
called by procedure DO-PLOTS0 S0 ?2 P( R: n0 T; N
called by procedure SETUP0 L" T' y& C& }/ ^ t* ]) s
called by 按钮 'setup'" M. m: } P+ Z/ i1 C
求大神解答啊 |