我编的程序如下turtles-own [energy]+ c. j6 n' W+ q, }: }
to setup; n, ?9 d: g' f' r
clear-all
' b) W- X. D c6 ^* }) `# l' y setup-patches
; `1 \$ V/ m, C create-turtles 100% E. q8 k4 |: |( E6 t
do-plots7 S2 \! E5 r2 q' O" r0 {
ask turtles [ setxy random-xcor random-ycor ]
; B; g( ?9 {1 `3 }1 k Zend
9 w; C2 S0 r& A! D! ?to go
0 {$ p M/ D" G$ E/ B' x4 U move-turtles
! P9 s$ c8 L; ^+ `/ W; r( k- X eat-grass
3 c+ F: o4 r1 W: B" s7 I+ V reproduce4 m2 J4 S* Y- t6 G3 T( c8 h4 W
check-death
5 c9 [" l- L3 c5 E3 o7 N; l y regrow-grass$ A( ~4 C2 h( O
do-plots! e# E' _0 V# o7 Q2 S1 Z
end
# Y; s" l1 i6 D9 |* eto move-turtles
/ w' {1 J: `7 j0 V7 A ask turtles [8 A. n G9 G+ X- D8 @( s% T$ p6 @5 k
right random 360
Z: h5 L) D& p+ d# S. c forward 1
6 P) s4 c+ d, P9 w) \- i. D* M set energy energy - 15 R" g7 D* {, e) R) E7 ?- _) F
]; I' V: {9 M; U
end
4 V6 t- a/ p. B' Yto setup-patches
8 _. z8 Q5 w( d' V4 t, U" L$ P7 _8 f9 m ask patches [ set pcolor green ]7 G: _/ F: x4 y+ t& W0 x
end/ }6 D }; w# u- ]+ S! H3 ~
to setup-turtles7 `4 `" W) L2 V- v6 M8 u
create-turtles 100
- d/ K: m, K1 R( v' u2 _ ask turtles [ setxy random-xcor random-ycor ]3 T2 x- ~: |# o6 j
end" ]3 W8 Q4 M6 Q- p; N$ o# E
to eat-grass
- j0 z7 E6 f# u9 s ask turtles [0 ]: w- x% q% ]: W
if pcolor = green [2 M* E# @+ C# X; Z' ?) _
set pcolor black
K# B( X. ^- S4 z1 j0 } set energy (energy + 10) p: i/ p3 l6 l: G1 i0 v) @
]
5 T) q/ p. Z4 N7 l4 B7 Q, b; J ifelse show-energy?" F" F- p1 M+ [
[ set label energy ]9 L3 s& e& D, [9 _+ l( Y* c
[ set label "" ]
: S0 _0 J9 S4 U ]; G5 J4 K8 p: g8 b7 s. a6 @! k
end
; h v f' W6 M4 Q! O! ~to reproduce
8 \8 N; N! E( t3 v4 q! ?# c7 x9 G ask turtles [% v1 @; F5 h# |8 r7 I4 `
if energy > 50 [! I: J6 \1 _, k. m; }
set energy energy - 50# c8 H2 f/ X& d5 f: e* N1 v
hatch 1 [ set energy 50 ] A9 K/ x0 _/ ]! s
]: K8 G- a7 I2 ?; b& R: t* R
]
; |% q( K+ u \1 wend
- e& m' B, B0 l' @3 C: `; o& Lto check-death
) A( M' X. {" G) n ask turtles [% q7 K4 d8 ]6 Z: t; i- t4 V
if energy <= 0 [ die ]) r8 e$ a2 q& ?
]$ [1 M) }- W4 W* z" |, J" ]9 J
end3 q0 ` q+ q ]
to regrow-grass
- H6 H. U0 D, o% Y* m1 U$ e& \7 U ask patches [
$ a* d) x& w8 i- i7 h if random 100 < 3 [ set pcolor green ]
( \9 n$ k9 c; n P: h& W. R9 } ]7 M. Z* P- K L' |8 \5 J1 W' \
end
' z) b7 K: a f' @1 fto do-plots
$ W! C8 C6 Z0 E+ a set-current-plot "Totals"
9 h& i- O5 e* W$ ^ set-current-plot-pen "turtles"2 l% y h) g- X! g {% w, _$ B
plot count turtles
l, c$ `9 M+ n set-current-plot-pen "grass"
9 Q" H) i( [" O6 ]. [3 a% J plot count patches with [pcolor = green]1 L9 a* Y& q5 p
end% \( i0 g9 @: ^
可是运行时提示no such plot: "Totals"3 m5 V Y, ]6 D' g' f+ o
error while observer running SET-CURRENT-PLOT# \ L* ~% n. V/ t, _5 T0 N
called by procedure DO-PLOTS. u" _, k# V0 n& a+ I) b
called by procedure SETUP
1 z. R5 U, L/ x called by 按钮 'setup'& e3 p! e3 r* f, I3 `2 ]$ q$ \
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
