我编的程序如下turtles-own [energy]7 i: h, {) l) `
to setup
+ [) T+ L+ q9 e( Z- Q6 Y clear-all, N2 ?2 s, D$ j4 q5 l- @; m& s
setup-patches: I) c, r/ ^" I9 R
create-turtles 100' N M/ v4 z: ?2 @
do-plots5 @! J: S1 g3 |5 X
ask turtles [ setxy random-xcor random-ycor ]
7 \/ V/ D% y) b7 L- R/ B, L0 R( Q l& p% Yend
- j3 h3 g2 W- g4 @8 s: ^* Q" Uto go5 t8 a2 r0 u8 ~7 N- Y
move-turtles
3 T2 L/ ]; N1 R6 `5 m eat-grass
+ i7 i- c3 `" W- w+ }" v reproduce! v$ B* E0 q0 o
check-death
0 M( Q' d3 g) D regrow-grass* P: @; G1 S" d, f A( ]. \
do-plots
5 J7 c3 B6 [4 z' vend
, }2 ~% V& N, T# }. l% U+ `8 |! Vto move-turtles
, f$ g9 R e6 q) ]' w ask turtles [
- ?1 t) v! i2 S& H% ^$ [5 ^ right random 360
8 W$ @& C% y. m- @; } forward 1/ e, Z; E3 Q2 v6 z+ h3 W8 }
set energy energy - 1/ D8 ^8 c0 O7 ]3 x! V
]$ K0 d( O7 V e
end8 A9 r O+ h) a$ V5 A/ r5 `
to setup-patches
4 p/ L2 E4 j% w1 x3 P; [ ask patches [ set pcolor green ]9 \- S$ l8 l& E5 s* x l; z
end
! Y; x' A {2 J$ O) F2 r* A2 mto setup-turtles2 a* v9 [( `/ q% T. Q0 R2 H
create-turtles 100
$ B, d: s! _$ k1 A ask turtles [ setxy random-xcor random-ycor ]
$ ~/ W6 n* ]1 R7 D& zend
& O2 P, g/ x2 Pto eat-grass0 [9 Y1 F4 I' z, F: z, z) C2 b
ask turtles [ ^$ a/ r& L, V" O- s9 F
if pcolor = green [& e7 t$ Y. _- ~/ @6 L" P, X
set pcolor black- o2 p1 Q, X' c$ L* w
set energy (energy + 10); Y1 o3 Q# H0 [- q* B
]
+ v4 x* {' Z9 m' w ifelse show-energy?- i& z# ~* W- t3 {
[ set label energy ]4 x( o, i2 b& Y
[ set label "" ]
0 j% L$ x1 G4 ?+ U ]8 s1 ^! W6 y" H
end
4 R Y. O2 o+ {4 p' a8 a5 Hto reproduce! l7 p9 L8 @5 c
ask turtles [' O4 ^2 A( T% ?! H5 \
if energy > 50 [* s+ [3 H) P; P" S2 I( E
set energy energy - 50. \" B! R4 X# j7 P6 @
hatch 1 [ set energy 50 ]7 _/ b0 c1 D2 f% E$ z0 _ j
]1 d" W3 C8 d3 F: ?7 h
]
' V& }' V9 S" W4 Z2 j9 W1 K) ^end4 I; s5 ?% H( {, l/ Y, {9 T, [
to check-death6 `+ o! o( \1 f A# \
ask turtles [
/ i: T( D: U! X- ^6 }! ~ if energy <= 0 [ die ]" n, f( F) S- V7 d
]6 i, z+ j Y. ^" K
end* M9 {7 `: L3 _
to regrow-grass6 Z! Y7 r7 B4 e/ S: u4 K
ask patches [
7 y; z& @: ?1 ^+ F! a; u) O `/ L if random 100 < 3 [ set pcolor green ]3 D8 a2 j0 q" G% y
]
0 }, B# l$ B1 f' f# Hend) @/ v6 n. v& t% x
to do-plots
; O; H" t# B6 x$ f6 j% H1 S' Q set-current-plot "Totals"
* A% e% ^& X: N( I' w set-current-plot-pen "turtles"% H v& ~1 z& M
plot count turtles* y5 n d5 m8 Y7 s- s0 A
set-current-plot-pen "grass"
1 u3 u( m# h) m! Y1 [4 f plot count patches with [pcolor = green]
4 e% q3 {9 h, F6 }end
- h# z$ f% d6 ?. s( L; t0 o可是运行时提示no such plot: "Totals": q( H' L/ P h( B
error while observer running SET-CURRENT-PLOT
( B* |, e+ _, B, Z/ I called by procedure DO-PLOTS
1 I$ y+ y+ O+ T8 h$ `+ n ` called by procedure SETUP+ U& [$ X3 R) o
called by 按钮 'setup'7 N5 z7 t: _( p2 C5 Y! \" j
求大神解答啊 |