我编的程序如下turtles-own [energy]
4 x H0 h0 V2 j- d B+ m t: eto setup
$ G2 G+ D _' T: \5 ?6 ]# h% G clear-all
& p, ]: V; L$ z- ], Q! t setup-patches' d; s. i/ s8 S$ a
create-turtles 100
]# C; V; b3 F, n& _2 c a do-plots: E' ?$ T) X0 X- J
ask turtles [ setxy random-xcor random-ycor ]
; }7 c( S" s6 y8 _" m( U* bend
3 R4 r, p* a0 k$ pto go
% {% Y& S, `; X' g) l3 z: E& U* N move-turtles- L u$ c) E7 _7 I
eat-grass, F0 O4 ?+ |8 i; l
reproduce( ^- m$ R7 ]; b$ D% c C
check-death6 r2 V. [8 z; B( c
regrow-grass" X9 ?9 e: N' q- \
do-plots+ w& x# i( K" M4 C, @
end$ ]' L6 C% w! N" ]9 {; I
to move-turtles
{0 b& {% b' U1 ^! B% X# p* D ask turtles [
4 J; s7 [; `0 j right random 3609 B! P2 P6 w, D! O( I4 B
forward 1% m4 p6 m" R- q% c ]% W+ J2 L
set energy energy - 1* l+ Y3 {: l5 D) ]
]
7 z# A& `/ F. V1 `# }; T" Bend
4 d& }) q) W% N& M# Fto setup-patches
1 s% S. P6 d8 d ask patches [ set pcolor green ]
: ~7 e2 X/ n/ d( Y4 G& ]% Qend H- G, F4 ]6 { X
to setup-turtles
) k; E% F. z c/ u# t, T create-turtles 100$ G$ A- A! b. I2 V5 r
ask turtles [ setxy random-xcor random-ycor ]/ w9 M0 C9 \) G# K$ j# U
end8 `* J: g: J) a/ P
to eat-grass0 d+ R8 [' |2 ?3 ]7 K9 Q
ask turtles [
9 b4 y1 \# O8 Z {: f, ^ if pcolor = green [# s5 F8 m3 O) N
set pcolor black
/ J+ h- K' c5 T( A" o q t set energy (energy + 10)
& F) \- n( {9 C, z% H( S( y ]. {, G- K6 n+ T
ifelse show-energy?
% Z% \' P7 W6 @# G& {' S$ q; C [ set label energy ]" k5 g$ v6 v1 O) m; N% E
[ set label "" ]
( v" k) ?9 n8 ~0 N4 ]7 T3 S5 q ]
8 l& E& j% \( }! Zend( v$ ]3 e3 G% P3 w: u! K- A* i
to reproduce( ^4 V! J8 F& {% F' W* O
ask turtles [
5 Q6 o2 y# W; j; h if energy > 50 [) B* y& _& ?& b4 w
set energy energy - 509 W0 Q2 e, i+ c! ]- F; f
hatch 1 [ set energy 50 ]$ L1 |! n! w' _4 M; R
]+ i/ y1 z! e9 i5 n/ R8 \
]
- A" v. q/ J h; j6 Rend
. f1 T- x1 {4 C5 ?3 f+ I6 mto check-death0 p4 f9 y2 r, Q! r8 N/ q
ask turtles [# K( Y. d" T l* I7 \
if energy <= 0 [ die ]
( }1 Y, X c% v0 m5 c0 ~ ]
]; b! e( q' x( K+ ^, Iend9 J5 u: W6 m% l# k; s( U" e, f; X
to regrow-grass
( D1 N/ p/ {0 K# ?/ c- c ask patches [
0 l' a; ]7 E. M, I, s( p, I if random 100 < 3 [ set pcolor green ]
. E3 O0 ]/ u- [* Q$ Q) z ]
' u2 y% U8 x* _0 x0 mend
5 }8 } B4 v; G y4 S% P9 ~to do-plots
/ U( E& V6 Z1 Q8 f ]0 O set-current-plot "Totals"8 j2 @$ r! C6 u6 |$ t7 H' R- |
set-current-plot-pen "turtles"
) | o; O' u) o% D( `6 J& Q) a plot count turtles+ I M% i7 O) g# R
set-current-plot-pen "grass"% t$ |9 _. ~. p' D
plot count patches with [pcolor = green]
% }0 u% |3 K+ Zend
; m& ^9 ?2 F6 x7 J可是运行时提示no such plot: "Totals". l3 J( L- ?' U" t5 o2 E+ P
error while observer running SET-CURRENT-PLOT
' l7 @6 |2 b6 o4 Z [7 m" b called by procedure DO-PLOTS
+ Q. z; X4 H$ E+ W) V called by procedure SETUP3 ?* s9 j: D. K* g% G: m0 n. M
called by 按钮 'setup'
2 @) k0 P2 E3 b5 h; o. u" j, t求大神解答啊 |