我编的程序如下turtles-own [energy]4 W6 d! b4 N1 Y+ n' m" u/ M5 K
to setup. t7 q$ V: K1 Z, O
clear-all1 W M" X0 J- ]! Y
setup-patches
* J% g; K( u. ?! N) D create-turtles 100* }- {5 m" G {9 w9 g6 y; C
do-plots8 S" h: i. D7 \; k5 E$ S4 U- P
ask turtles [ setxy random-xcor random-ycor ]2 V& Z. g) s9 a" k3 D
end( y: {+ G: _1 j) H8 G. w4 z! o
to go
2 M9 c0 M5 S$ i3 W e# Q7 S4 ~ move-turtles% O S0 [7 ^- P1 [, O6 {/ y
eat-grass
9 S1 i! D) c, R reproduce. ^7 P3 n! H( @& f; k! H
check-death
1 A* L3 i% u, p, V8 e regrow-grass
0 t; P5 @% k& P) |$ ?, _8 c do-plots
?+ Q& {. Z% B0 M/ m* J. [, E; Uend! T8 S% b) Y) M/ J/ e; F
to move-turtles
, B) B! o: b" ?# g. [ h4 B* s ask turtles [7 D" i. d* W( c/ e! X) e A
right random 360
# `# a& A, S Y( x, L7 c forward 1% A v$ B" ]0 B9 L2 A
set energy energy - 14 [3 s* h& ? m( t
]
. r+ V; W/ y# K7 T" a- I* Fend4 x9 N) X# I/ _7 o ^
to setup-patches
; L0 |5 {3 u/ _, p3 F" k, q9 \ ask patches [ set pcolor green ], f7 R# D" T3 N( X/ h- y B/ t
end$ R6 O/ x5 ^( J1 T6 t4 ~
to setup-turtles
( ]$ u$ J" a2 Z; W: d, {% v create-turtles 100
* o4 f3 x% f1 H' M) ?9 K ask turtles [ setxy random-xcor random-ycor ]
- y; w/ V; ?6 zend' j; i9 E$ ~6 W
to eat-grass- T$ {$ {! l3 u& @+ K% ~! H
ask turtles [
1 w+ [4 [ @6 W+ ` if pcolor = green [/ y2 ^2 N. A) a+ O1 N
set pcolor black, ]0 O: `3 e+ Q1 m
set energy (energy + 10)- Q$ a6 {8 V. C |: U. \$ c
]
! J; [ [& G: ^8 \ ifelse show-energy?' o5 M' w% M' V/ g3 k! x( ?
[ set label energy ]: n/ i- `. ^0 |4 p& q: T" K7 \' i
[ set label "" ]
! o @% ~( \5 ~* O* ]5 H ] q. w1 d8 ~/ ~: O
end
2 D- Y! |2 t- T' k/ s4 {" `0 mto reproduce8 J2 G- T" W" E' F; i* g% O
ask turtles [7 t; S" e: ]! i1 w# Y3 O8 l
if energy > 50 [+ @/ S0 y- V7 |$ ~' y6 a
set energy energy - 50
5 ~- h. N6 g& r, L$ M9 N hatch 1 [ set energy 50 ]" b$ T% I1 O. w: B
]
- o- W- H8 ?2 A; w1 y2 B ]. V q- M/ ?& h" y% p h
end
c% Y( J- [/ _1 ~; z7 pto check-death
) ]7 k& ]+ G6 L) T2 R/ _# y& z ask turtles [
6 q' k4 k3 b- V7 w4 }% E' g l if energy <= 0 [ die ]
) Y2 W4 b! P- \7 m, ?/ W0 N4 u ]
9 b2 J# W4 H! e, f6 V: }8 Gend2 g- D+ B1 {0 B. U# t9 v
to regrow-grass
) e0 h2 L2 z6 u8 S/ H: X" b ask patches [
6 h5 A2 f4 _* ]; g! t2 x if random 100 < 3 [ set pcolor green ]
?, X2 C I0 T+ m% Y# w: ] ]4 r; _& v% d5 r/ U$ e* k/ h
end
- W4 Q5 v' K1 L/ I; t& Y# qto do-plots" I5 F$ D3 J: R- [2 E; A. g
set-current-plot "Totals"% n9 V4 K8 Y' S9 }! {- a" q4 [
set-current-plot-pen "turtles"
9 l+ j+ q; b* o* M7 ]6 C plot count turtles( A% H+ U$ `& l
set-current-plot-pen "grass", A- O; B, ~: ?
plot count patches with [pcolor = green]# K. k+ I8 [% S* ~+ @
end
1 ?! m n+ `6 r* O2 V- J) I: O可是运行时提示no such plot: "Totals"
]+ C1 x; a0 N0 K7 d, Perror while observer running SET-CURRENT-PLOT1 h- U( O/ |2 e$ j+ p
called by procedure DO-PLOTS) u/ V; T, Q: p1 B( W
called by procedure SETUP6 o7 _- q) c5 t) {0 g( d2 j
called by 按钮 'setup'
3 ^6 {: T$ n8 Z求大神解答啊 |