我编的程序如下turtles-own [energy]# R8 Y3 x& W) v) M- Z. f% ?) X
to setup/ N U3 w' Q/ U5 G) j
clear-all& P' `% {. i* P: |
setup-patches
+ ?+ I! R9 J: g4 k create-turtles 1008 n% g2 q6 Y5 v% Q& ]- p
do-plots
4 J9 G" h' I: O O/ n* L1 D$ A @ ask turtles [ setxy random-xcor random-ycor ]5 z% x" |& u7 t4 M! H) A0 ~
end) G+ N' Q o; w
to go
: X/ B& A+ k1 S9 d) `) a0 x move-turtles, r3 i5 T9 S O; Z5 w3 E1 F' ^9 F
eat-grass
3 [$ w: x, n) Z) ]; [9 g1 n- L reproduce, K$ y( C' o5 X8 e+ q, H! k9 c
check-death& T4 h5 k8 G# G& l2 S
regrow-grass; u2 _$ ]3 v% n6 E7 z, H$ x7 X
do-plots. C8 w: X: {8 ~3 q* U+ Z
end
2 s D$ G7 U8 G0 V- N' D% ]to move-turtles
$ u2 C% u3 l$ C3 S4 F; P ask turtles [
( |: e, v3 B! L3 @3 o right random 360+ x n$ a' h$ p& O" _3 ~+ T8 ^
forward 1/ _3 j0 U1 o: T- G N: W( X
set energy energy - 1
1 W9 q# E' V# M2 t6 Y$ J+ C3 t* d ]9 G6 s0 W6 T! j* ~4 I
end
5 K' I% |1 _, ]4 bto setup-patches
' W2 l' P! M" K& @3 Y% ]' ] ask patches [ set pcolor green ]+ f6 N* I& b, k. q! g
end, A/ g8 C4 r# r" A, _4 x5 B' F: K
to setup-turtles% R4 A/ L- w8 X0 g
create-turtles 100
( ] e& o- p% x4 P ask turtles [ setxy random-xcor random-ycor ]
) i5 C! r; O% g! v9 cend
/ B( G+ H. |/ B' K- p$ D0 Q/ P6 Pto eat-grass
6 u1 N% r. g4 m" n ask turtles [& Q% b B* a; g1 i
if pcolor = green [3 F4 A) \6 p% Y' E
set pcolor black2 a- U/ C4 D5 [# w+ `, ~% m( x
set energy (energy + 10)* L# h* S8 P/ |
]* Z- M. U7 y: w- S+ n" S% r
ifelse show-energy?6 ?( s) Z, t2 D) J; @$ n8 P* p# L! w
[ set label energy ]
2 P8 y* X/ Y( ]) {9 o" E; n5 M [ set label "" ]
$ {, y( L i/ Z" ] ] n5 ~( Q+ m6 Z
end
7 q3 u( a1 A6 R" k/ R7 E2 ^8 d3 y7 tto reproduce2 ]* v- \$ w2 d
ask turtles [
* C5 c- @: G9 W3 i) r$ E- r if energy > 50 [
: n% S$ I+ N' C) m# h- | set energy energy - 50
$ v. Y9 D# [- z6 v hatch 1 [ set energy 50 ]
8 P0 n9 c' V4 q4 g T! w7 X- E8 L* p ]6 s8 Q% I8 ]' u& {5 L
]
" M; I& ^/ J. y+ f3 pend# n$ ]- R; B4 o/ ~) F
to check-death$ V' A& R: N- h
ask turtles [
7 t" r! n4 V5 a. R% }9 T6 J if energy <= 0 [ die ]
+ c( |( K3 K+ H' A( q! l4 L' w1 E ]
4 F: K. |" l3 c5 B3 x2 L& Bend& Z7 f5 @$ E$ C: Z& E* }
to regrow-grass6 ^) |1 x2 H5 q9 @
ask patches [9 ~& z. f! @/ N0 D* e4 a' k3 n- w- l
if random 100 < 3 [ set pcolor green ]
* C0 I6 H* @/ m9 O @9 u ]- s4 z: k7 y2 I+ V# s7 U2 u& I
end2 D" L6 z) O5 `! R8 R; z: J
to do-plots
, Y5 ]! P# a5 T set-current-plot "Totals" I) W a$ a v; v' H( Q0 K) L( F' ^
set-current-plot-pen "turtles") F8 t1 I8 S5 r u
plot count turtles
' N7 d- N0 u( s2 q set-current-plot-pen "grass"
0 P+ x' Q/ ~1 I5 D8 M- L plot count patches with [pcolor = green]9 s( J" `. W' ?. L
end* E6 h/ \2 m5 n8 D2 j# D. S5 F
可是运行时提示no such plot: "Totals"
) O7 ~- o* V( H. z$ u. U1 r( Zerror while observer running SET-CURRENT-PLOT8 K3 r9 x! \7 g4 m4 ^ t: `
called by procedure DO-PLOTS3 f/ `+ ~% Z& t; A& u) R0 i
called by procedure SETUP) I4 d/ b) Y: o3 B: u
called by 按钮 'setup'
: V% T9 b/ {+ a7 e. J- r; |求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
