我编的程序如下turtles-own [energy]3 V& `1 Y7 [% N* W) d( c/ A
to setup
0 l9 w Y ~4 N( Q0 D. v clear-all1 t0 c2 _# A! E0 C
setup-patches
q/ R6 J9 E/ ]/ H1 X create-turtles 1006 X4 t7 g! @5 g+ b3 ~
do-plots
+ E3 @' ?# X1 ^5 a ask turtles [ setxy random-xcor random-ycor ]& A! j4 ?5 \9 Q, {4 T6 Z& P6 R% W+ p
end( Q8 @; }7 m W1 w# d4 X7 @) s8 a# W
to go- W9 \7 e2 p+ c0 x
move-turtles+ u4 [8 h$ J: u0 r
eat-grass7 z; H) i5 d3 z q% `
reproduce8 c8 ?) c& r0 Q2 C, j. N5 v
check-death: w D0 U2 ~; D6 X. k" U
regrow-grass
' H" R) {5 Z) P6 ^ do-plots
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to move-turtles! F8 i: ]5 }8 m+ Y- w; i7 P1 A
ask turtles [' l+ y* x# Q! @' w6 m! z
right random 3604 f2 s* U' U$ ?& r( E! u
forward 1
5 S5 n3 z5 d: c" N" t! E+ M set energy energy - 1
! a8 {# t. o" ^" Y5 T- x ]
* S; M2 Z# t# h2 d aend
" y1 q& v6 s( [3 uto setup-patches( X) F0 g' o: U) q$ l0 x4 O
ask patches [ set pcolor green ]9 m+ g2 n9 M" J5 ]$ K: R' W
end
. F1 k9 E. U/ H) g2 D0 s. u1 F3 tto setup-turtles& O( l, J, Y3 V9 R6 }
create-turtles 1009 e5 _3 z. [* |( F+ O
ask turtles [ setxy random-xcor random-ycor ]
' b1 A3 L; l4 I2 B( Q. C( A) Kend
! M* J# D. f+ |' Tto eat-grass
, m# [9 C" r o2 m ask turtles [
2 M5 P8 U7 I& {1 B6 O, N1 w if pcolor = green [
: v$ f7 t, C) r) t2 H$ ]5 c set pcolor black+ e" g$ d% j. ^- j' @
set energy (energy + 10)
( u) f3 |3 n" i- g ]
: z. y& T# e5 H0 ? ifelse show-energy?. ]% `" Y) O7 Q: ~6 n8 B
[ set label energy ]
5 p# a9 U4 l* D4 \ [ set label "" ]% P# q6 `' N( A
]- \2 a4 w6 [0 m1 h
end7 E1 w% z: Z. s% B7 ~9 k4 i/ G
to reproduce
$ u, l2 d m4 x: K5 }8 e" r% o ask turtles [! v9 [8 b% O x+ P
if energy > 50 [
3 }1 c1 w( N; [* k v' D' D) ?6 p set energy energy - 50
+ F7 h0 C' j L$ G( D hatch 1 [ set energy 50 ]; v% w: o! M' g: O6 y, Q
]! `2 {1 V7 r4 U5 m, B: K, G4 u" U
]
E' S( V: a$ U6 [$ ]end
) @9 D' O, ?& X2 v9 r/ T& Dto check-death m$ Y( u6 [' {1 e( |
ask turtles [
0 q# o6 l2 R/ u5 y {0 p if energy <= 0 [ die ]+ [0 Z9 b! F' K# b4 R
]
! Z/ V1 M, y$ i7 G% l5 Fend, R2 n* q; M/ i j1 s
to regrow-grass
: I( k9 m! ~$ d. Q$ Z, c ask patches [7 G' S- y# A7 ^/ w. |# w3 a
if random 100 < 3 [ set pcolor green ]
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end, x- ~% a7 x" O0 k* ]/ [" N8 w
to do-plots
" o" G6 p7 B. t5 o1 @* Z! { set-current-plot "Totals"0 K. Z% v1 V% @/ L, O& P- Q. m6 `
set-current-plot-pen "turtles"2 `1 \' |* V) `& y3 `8 A
plot count turtles% w" i; `, r% h; m9 g, m
set-current-plot-pen "grass"" x; m# I! x6 v: F" e) N
plot count patches with [pcolor = green]5 ^0 T3 F8 p' ]: R
end
& X: h6 E2 O! X; i H F3 G可是运行时提示no such plot: "Totals"
# `6 H9 P% T% W7 }error while observer running SET-CURRENT-PLOT$ B# P- y+ ^6 k) a% G0 A$ T* }4 G
called by procedure DO-PLOTS
& S. F2 @/ R/ h/ f0 D* `( }5 Y3 O3 A called by procedure SETUP
- |. W6 D7 A! o8 k: F6 J3 X called by 按钮 'setup'& z, W5 j4 E8 p% E9 M% ~
求大神解答啊 |