我编的程序如下turtles-own [energy]
" C [7 K, w. n: B. h7 Cto setup
, a: Y- m& z9 U5 u clear-all
7 l$ k! V1 [# |* F: o setup-patches
+ o" k* _+ d1 u C& @ create-turtles 100( K2 o* z7 b- w/ C2 C0 m1 e# B
do-plots
2 N& A( K. U, s6 _% [' ] ask turtles [ setxy random-xcor random-ycor ]
6 B6 I. j* s' @end
; l+ [3 a; T7 ]9 r4 i6 V+ w& cto go
: _ o8 Q5 O) S0 U8 T5 f move-turtles
8 u$ U. y0 D4 I6 r3 E* G eat-grass
; X/ I+ o% ^$ i' p( w reproduce
9 l$ o/ ^5 K0 ]3 T check-death
) N7 T5 t6 V3 j' y regrow-grass
& S+ }. y( E) x5 i+ O; c do-plots
6 U' S3 A1 I* v" L/ g- |end5 U) {1 w7 u# e- e% `. r
to move-turtles
4 P0 O k: K9 i* X3 o' u+ ^/ H ask turtles [' i( \/ _2 ^% l. {7 y& [
right random 360; U G8 |$ B% k% Y% J
forward 1
9 I& Z3 b7 h" O( w4 p l set energy energy - 1
# i8 p' P" Y1 d ]
R" P# _2 c, } L1 gend) z& l$ r" E2 R
to setup-patches
# G$ T' O; j- h9 t% K0 y ask patches [ set pcolor green ]
% J/ z) g/ U) @' W. g- n( i& ]end
" x! A, Y; q+ ?* u: f5 X' uto setup-turtles
7 ^! D) ?9 t4 V create-turtles 100( p3 v3 q8 Y" L: R
ask turtles [ setxy random-xcor random-ycor ]
* b9 o0 c0 K2 k. q# z2 y3 S( |% oend
% R2 m1 M# s) {* vto eat-grass) r" I) N1 G9 g1 m& z1 ?
ask turtles [0 x0 Z. x, I7 Q+ G
if pcolor = green [) ? A) v; a, B9 p5 F
set pcolor black
6 g9 e( w5 I. `2 |; V6 Y3 C set energy (energy + 10)
, e; c7 [' c- x5 s$ `5 ?) z ]4 a1 g# q T$ W, a. F# E$ R
ifelse show-energy?
6 X) @9 }1 c5 k( T0 G, J2 U [ set label energy ]+ l3 w* @, V9 ^0 n% E+ |3 b3 {, G
[ set label "" ]% ~8 V1 f, k, q1 e
]6 |) \- `- K+ l+ V# ^0 f# d
end
3 a' E3 f4 @! A3 b9 Fto reproduce
E Q6 h$ c6 h ask turtles [
3 f$ k4 p! @ S if energy > 50 [' i3 Z( h, B5 e) F4 j" p
set energy energy - 50
7 g2 z6 Q* W6 r& _! l; P: H& K hatch 1 [ set energy 50 ]
0 l* w, a3 c. e& X! n9 d' A3 ? ]2 e8 F: f+ W! _" m
]7 p3 B3 M9 {. O! y) q1 N, W/ L5 G
end
1 _7 D. I! D* J5 W/ G. a0 v6 r/ cto check-death
5 G7 X6 b7 h+ e5 y ask turtles [ Y- s8 H6 Z( b1 T$ L' }1 @* W( f
if energy <= 0 [ die ]
1 ~5 M: G8 P. w+ W) a" h; C6 }! p ]
* Z d* @7 X* X0 Gend8 j, m7 [) n2 H( |3 d
to regrow-grass0 I$ s. v7 \. U1 H8 `
ask patches [
5 i. s/ k# B( c! t2 j* ` if random 100 < 3 [ set pcolor green ]
1 j0 n( U7 F: j ]4 M8 H4 A4 z! G3 G8 S0 f1 r1 C; p
end; d. _7 J! Y: q, z
to do-plots$ v5 [% O% s" i7 p; @) b% R/ ~
set-current-plot "Totals"
# C3 A8 K0 C( B set-current-plot-pen "turtles": W2 u. m( `5 h+ {3 Z I, }+ M
plot count turtles
, G) U1 M( n# Q7 ~& L1 S; e# W5 F7 ~; k set-current-plot-pen "grass"
- z2 _! M8 [" W& P plot count patches with [pcolor = green]0 W: _7 }3 H( ], W
end( I1 Q" r+ T8 ]$ u
可是运行时提示no such plot: "Totals"
8 _$ |* |) m/ W9 `* u1 k% eerror while observer running SET-CURRENT-PLOT
8 E1 n2 `* R3 G: v called by procedure DO-PLOTS5 Q2 n4 P2 E' N, E
called by procedure SETUP) {5 z4 V3 L* E. s$ T- L3 K
called by 按钮 'setup'0 M2 \$ m, b7 D; k& l: i
求大神解答啊 |