我编的程序如下turtles-own [energy]
6 @: o6 j1 s3 D9 ato setup* F1 r. x, w( N$ f7 w* K
clear-all e. F% z$ V& T' f. _: [
setup-patches
& {1 g/ A) R" t create-turtles 100/ f- w7 z! Q* ` _$ r# J8 ?
do-plots
' ~2 s/ D& b! Y) Z. T ask turtles [ setxy random-xcor random-ycor ]# E4 a d0 o9 S$ F% ?+ z
end
$ g' z3 T1 E. r- m$ k: i9 q- }to go' C1 N7 A' {7 k8 i
move-turtles
F; h! I( F0 Y% {1 g2 H- H$ C+ p eat-grass0 O; _! V6 z# v' L$ c
reproduce% s: Y3 h3 m: t
check-death% [5 Y8 T* X! I7 m; w: \
regrow-grass
5 M. s' l+ | A/ R do-plots% C% ?( m) p! j1 E
end6 K5 J: W* t0 Q' l6 H+ n3 b3 S
to move-turtles) m+ o- V- ?" S. f" y
ask turtles [0 V) D9 q' h& X+ n8 D
right random 360
& d1 z! U5 n: ?/ I% O5 [) B forward 1" x7 t# H9 z- `! m/ [1 T
set energy energy - 1
6 w6 c- G" Z: i0 R0 f: s$ e9 K ]
5 w7 y! v( ^% Q% B1 R6 [end
% w- k, A% f1 `to setup-patches
9 c6 @% d* B9 C* ? D% b ask patches [ set pcolor green ]0 V4 y5 Z u+ }/ Q
end
& s- `/ C4 K9 M1 l8 Cto setup-turtles* G! h0 N4 B1 p7 {# x1 x
create-turtles 1009 U: C. k! |8 n: |
ask turtles [ setxy random-xcor random-ycor ]
5 z% p) |0 F+ n1 q; _$ W [4 E5 pend3 j$ u! {9 |3 H3 ]; B5 {
to eat-grass) }% f+ u* z. E; ?$ C9 a1 k
ask turtles [
5 Z: |- e3 F. ? if pcolor = green [
7 D( I7 b" f+ i" n1 m' | set pcolor black3 ], b$ [5 L8 e+ |$ z @
set energy (energy + 10)2 @% y# d8 P! |* [. j5 k5 x+ c
]
8 O& p% ^7 k3 e7 x# N* |# v ifelse show-energy?
" `) U% \; x( | X0 T' r [ set label energy ]' H1 }9 [+ y5 B
[ set label "" ]( X z9 Q+ ^4 ]# n% T
]
8 h. F; O" W( A; {end* t4 n D. n; t* U; Y
to reproduce
5 n& z& \" d6 \0 z4 P* D' G( w6 G# C ask turtles [0 U. t. g$ D p: ^4 Q( X
if energy > 50 [
. O* n& H% V! d4 e+ K6 e' y5 R( N set energy energy - 500 p, f* f. a+ o( ?
hatch 1 [ set energy 50 ]( k/ h5 J$ U' J' A
]
0 n" @+ w9 ~" C6 B1 m ]
+ ], H) Y0 N+ Y) |. Gend: ]- F) t+ Y' X+ Z0 H" G b
to check-death5 v, [9 h. v5 K: @
ask turtles [
- S6 {6 {4 T# z9 k, P if energy <= 0 [ die ]
8 d4 d/ b8 S- s7 y! J) D3 f% z ]! V' j( f! u }
end
! O. U5 t, o# @2 Wto regrow-grass
# Q8 ?3 c6 \7 u3 p+ Y, `2 q. f ask patches [
, m6 s. f, `5 h if random 100 < 3 [ set pcolor green ]
; B0 ?4 J: [! K- B ]
+ m" A& Q8 g1 z: v6 gend' t* o- S6 a1 C
to do-plots
7 v& V+ }" K+ Y; O+ p' h: q set-current-plot "Totals"! O4 o6 D) c( W% A0 b: a* f
set-current-plot-pen "turtles"
. g+ Z" X7 g: g" Z h I' ~1 d plot count turtles4 E1 `# F/ y2 @( }9 B- U1 Q
set-current-plot-pen "grass"# R8 s5 f& N: |
plot count patches with [pcolor = green]
2 X5 L" G' Q4 Z( X- B, ~end
/ O! f3 P& q9 l: X6 w+ N可是运行时提示no such plot: "Totals"# x& j5 n/ A$ Q: S
error while observer running SET-CURRENT-PLOT+ S# k. }( ]( r- _( u% I
called by procedure DO-PLOTS+ [( q" s3 f; ?6 S6 h; t
called by procedure SETUP1 Z, ~# ]+ A& C- w$ L5 i2 @/ Z
called by 按钮 'setup'
) Z0 K. t. F: W6 ~: ]5 U求大神解答啊 |