我编的程序如下turtles-own [energy]
( h! A' y9 {* {; xto setup8 `4 D$ A, W$ `" L
clear-all
5 g6 f# _8 m* N$ A. x$ c setup-patches
3 O |$ k6 G D; U1 |: p& x5 j create-turtles 100/ \& T) `' |8 \, N$ L2 f e' v
do-plots
" B8 Q* b u7 i2 P4 r1 X ask turtles [ setxy random-xcor random-ycor ]
_& J- G, \. s! l; v7 `3 ?) mend
w y2 k! u% u. Rto go5 k3 k+ V- e; b8 M) S& T+ {4 G/ l1 j5 ]
move-turtles8 f( p% K+ b5 t( j; W; V* h
eat-grass
/ g% s4 F- H! O1 @ reproduce
% a0 L% Y, U7 n& n6 U9 D; y& J check-death6 k3 x3 C7 a( a) A" B& j- t
regrow-grass1 v9 a' [+ l8 D: I$ M Z3 ~
do-plots5 S9 m2 f) y6 F
end
8 F+ T) M4 Y. V9 J: h8 H2 ?to move-turtles
. G1 u5 {7 x. @0 n ask turtles [
& d* b9 I! A* p8 `; [0 c5 F6 E% D right random 360
4 B& r) H6 Y9 Z3 a8 H+ v forward 1" R" F3 {4 W3 @2 H" l" l+ ]
set energy energy - 1
% c+ _" S0 [( j% C# b- @! a" q3 G ]+ k- s% r8 ^: C
end6 r; i. c0 \% r
to setup-patches3 Y, p, N4 x5 J% v+ K* e
ask patches [ set pcolor green ]3 Y2 \( A. Y7 I4 A, \3 J8 U1 X
end0 i/ M9 n' O; w4 R, Z% {
to setup-turtles) \1 o* j1 m% M/ m1 }9 b
create-turtles 100& V7 @3 U. U: x. j
ask turtles [ setxy random-xcor random-ycor ], i! M% F5 ~* ?
end) i3 x3 G5 V* _1 w: a/ p7 E
to eat-grass
% W( ]2 Y9 a; _ ask turtles [" S. K4 _* Q. r6 D" u" v6 E
if pcolor = green [, x+ a' G, V# l6 Q0 b! y/ D
set pcolor black
+ v9 d& s4 V$ A, W6 P/ ~$ V" k set energy (energy + 10)7 M1 H6 j I& F4 x4 t
]
+ X* x: K P8 K4 w+ } ifelse show-energy?
4 v5 b* p2 u0 Y, L/ G9 s [ set label energy ]9 d6 o. \! Q- q( d
[ set label "" ]
5 h) r' q& P5 j- L5 a2 C ]! Y' h3 L. Z8 z: \4 I
end
' d( n$ E( ~% u8 G4 m3 yto reproduce
8 N6 |5 H$ O" J4 b9 F ask turtles [/ j, R6 I D. S6 o: k4 L
if energy > 50 [
! \2 L7 b+ @' J, b set energy energy - 50 g# C8 ~1 P7 a$ N" ~" ?! @
hatch 1 [ set energy 50 ]
' ~* p4 l2 j2 R: A5 o, A9 _: X ]
9 q; S8 w' u( X! O: }" W. _ ]# G; y' D9 P3 h8 t) J
end6 L: `5 }5 o S) ^2 E( ]) T
to check-death
9 K U7 u6 p4 i# x ask turtles [
; h( ]2 I1 O1 n' I if energy <= 0 [ die ]' ?0 \: T# t6 q' N$ ?8 V
]
) \% F7 u2 ~+ a1 @1 Iend
- H' ^" p1 y a. q( V% d8 bto regrow-grass
7 o- S( w6 S- s# W8 X5 m ask patches [
2 _7 j6 @) a4 |2 O1 N4 r if random 100 < 3 [ set pcolor green ]6 e! z- S7 s; C/ A
]
; o! d" p7 V! i5 L0 d! H7 Z" rend
5 s/ g1 u* i8 _5 Q( e s0 F Vto do-plots( N P0 P Y& [
set-current-plot "Totals"! E' e9 t# y- `4 n. {. V6 z
set-current-plot-pen "turtles", A, ~5 d$ s8 `, ^# \- ~( E
plot count turtles4 G- N+ w M+ X( [ u" v
set-current-plot-pen "grass"0 B4 B# c1 Y4 e. @' V4 T
plot count patches with [pcolor = green]
' V7 |& Z5 z6 G# a& ^ `) u Kend
% q3 u- j2 h7 o8 x1 u! q$ j可是运行时提示no such plot: "Totals"& W- H$ I$ R% c6 `$ Q N
error while observer running SET-CURRENT-PLOT
2 e/ C% N* [( n* O called by procedure DO-PLOTS
]' H, }+ a- M) X called by procedure SETUP
1 V5 _6 f$ W8 k( B( A9 F2 a1 B* _ called by 按钮 'setup'
3 G, J5 N( t: W7 x$ \. ~8 n5 M3 _9 {求大神解答啊 |