我编的程序如下turtles-own [energy]3 p' O( q! K. w& _
to setup" J& B' `. d# C" R* l" h- {
clear-all- @/ |" v5 Z0 G" Y
setup-patches
! Z1 `( W( m) a" C* A9 O create-turtles 1000 ^1 _* T. E. U- G! w! c6 E) Q
do-plots$ b6 v u7 Z2 u8 U# U9 [" d
ask turtles [ setxy random-xcor random-ycor ]) ~+ I9 |( n) x* I5 U# `6 D& i
end
! r6 B& @ P( B# b* `' p5 f$ O! `7 M% oto go, E) G# y' `5 U, x( s% v
move-turtles: C8 s9 s% U) h1 Z% K( {
eat-grass
! P1 E' N9 P- G+ B. t9 @0 N reproduce2 `1 z, h: ?8 O4 q5 A% [
check-death
( k4 w1 X# M) n/ g5 ?# B. {4 Y5 H regrow-grass
/ Y4 k) B. P: f3 M( U( ]! B do-plots0 [5 o# R* S& _( x9 r/ n# R
end
' G) S+ d/ }. h2 ?- b, Q, ato move-turtles
( }( x) W" d" k" H+ }3 U" ` ask turtles [9 ^3 E$ M* n. N# s" U7 q
right random 360
4 x; j# ^8 R' K) m. N, Z forward 1
: ]9 P* k$ e* u q6 S3 {6 b# T2 A set energy energy - 1' H. E. Y9 @7 `3 a9 G$ r
]
% D. @1 x" U, J: W4 y7 M0 X, Q5 m3 k/ gend z' {: b- e* i4 g6 u3 I( Z9 E
to setup-patches
2 o, h6 c6 q% g/ P8 ~6 y ask patches [ set pcolor green ]
+ j+ I/ N1 S- Z4 S& K9 t1 Aend3 h$ d5 u3 `( o; C
to setup-turtles
; |4 B! x0 D' \& b+ C create-turtles 100, k! s# _ l- C
ask turtles [ setxy random-xcor random-ycor ]5 @ \, B9 X3 J
end5 U% y$ @8 F7 z4 J3 a' o: u
to eat-grass0 D" R/ l8 u0 j+ I9 Q
ask turtles [5 n+ z' X4 u5 T
if pcolor = green [
0 m2 n( s p+ G5 `4 a7 d set pcolor black" S" ^. u: |0 `( {
set energy (energy + 10)2 j) E9 K0 N P# x1 X. m
]
k% ^: _9 U! x2 }8 r ifelse show-energy?
7 W; a9 V" F& {6 o4 w [ set label energy ]
: ?# C5 q/ _5 Z& h4 ]. g9 k2 ^ [ set label "" ]) i3 k. p' G2 B! M! d, y
]
- T4 X7 D3 Y! n( send. n; v- B9 A' g" O) \1 v' B
to reproduce
) t+ |5 O$ q6 w; j! ? F( S ask turtles [4 g4 ]" x+ q, `
if energy > 50 [& V' G) U. v9 v/ l; [* v! A
set energy energy - 50
* }% I( ]+ R5 ^! O hatch 1 [ set energy 50 ]
i# d2 O X8 T* w: @8 G Z ]
9 f' Q) K8 T' a0 n" f ]
- s5 t: {8 W; ?, f6 l3 C. j; P+ K, zend
6 z7 O p& w, j$ S, o. D" W1 |to check-death) Z' v$ b4 R3 ]- S6 X& Q' m
ask turtles [
4 A% j* e Y: R. B1 d [" x if energy <= 0 [ die ]9 N) h N }9 |5 C* j. `( U+ D3 W
]& ~. B+ Y. U! S0 I& U. H) H
end0 q3 w) a3 J8 D- {* W9 i6 ^/ Y6 O
to regrow-grass; x9 S! x, V3 n
ask patches [& a7 c7 V3 S! x/ a9 s: {* x3 r
if random 100 < 3 [ set pcolor green ]" ]6 @1 K2 h; N* l: D! k
]) }& y* b" c/ ]; k- E
end7 d, W6 O" H' T7 h6 ^
to do-plots6 v# T/ T) J; E0 x4 V
set-current-plot "Totals"% |5 [6 D' C& t5 C# F7 }! N
set-current-plot-pen "turtles"7 g4 @2 n1 O& |/ `. _
plot count turtles
7 b* G* Y2 x9 N$ N6 O7 n9 }8 X/ }% p set-current-plot-pen "grass"
! F. @% L, S$ C( r% r& F6 z5 }4 j plot count patches with [pcolor = green]. a$ @( N/ Q9 j* l7 C- @
end: [- g" j3 \9 x2 y+ V+ \$ `
可是运行时提示no such plot: "Totals"
' H& X' q# r' ~7 L$ e5 k! T- |error while observer running SET-CURRENT-PLOT
- Q* B( D6 P$ ] o8 u) Y& Z5 {' z called by procedure DO-PLOTS
+ g+ S4 j& w! Y. S6 ?. \ called by procedure SETUP! T8 R8 M& J: t( x$ _
called by 按钮 'setup'
: r6 w8 Y1 _% Z( i求大神解答啊 |