我编的程序如下turtles-own [energy]2 v, V" E+ D; d
to setup. p" L) B/ k/ q1 ^
clear-all" A! `; [2 c$ N( z3 Z
setup-patches
/ n. @; l9 g. N" r create-turtles 100
# `# D7 N! I% [4 Y/ e/ b do-plots8 t. G" C" u+ r% y& I9 Z
ask turtles [ setxy random-xcor random-ycor ]
+ q5 |5 u& p% _4 Y$ F, t! S4 F9 Wend
+ u# J& S8 { b0 s8 xto go
" C/ S- v% [* X; w/ k% L. ]4 N move-turtles
" o( M* U2 P' ^3 G! U eat-grass
9 R' F& U- y6 g; A2 H/ ^ \ reproduce
; U2 X" N9 A1 |$ [1 x check-death' m6 s& ]) L- ]# B7 R# z9 L- E+ v
regrow-grass8 W8 F6 y. y" d; u
do-plots
2 }, _6 ^, w( p3 l; n1 c( ~end
& P+ w+ u {, b" u+ l0 j9 Rto move-turtles, `3 {2 L; V5 j" T/ Y& I
ask turtles [4 C6 B: b i; n. z1 f2 k. z2 y
right random 360
9 G& B& \3 H% e! ] forward 17 P" W; ]) S+ _7 m
set energy energy - 1" @4 \ Q" l8 Z1 |' B
]5 L0 u5 Z8 I' t) r* t+ z
end U4 Y+ Z; n, I7 w3 @5 p3 c# u/ x" e
to setup-patches& x8 p/ B% [4 v! z
ask patches [ set pcolor green ]% E7 ?. w& C' J4 y% g5 I# c" A* k
end
* E1 r: O$ F! }3 }0 I0 Wto setup-turtles7 |" F% x. s! Y2 y& y$ Z1 a
create-turtles 100
! N* x. x4 j. K- ^& n$ a; Q ask turtles [ setxy random-xcor random-ycor ]) L: x# ^1 I. z$ D" R
end' j1 m# Z( w6 R1 R4 A6 |) j
to eat-grass
; u" Z# G" q7 J8 N/ y2 v8 W/ H" g ask turtles [
# s# ]$ I' `" j' a/ ]: ~ if pcolor = green [
2 ^1 R. q$ q: M- h* F set pcolor black
( A8 n1 l" V& n# _: H- K6 _ set energy (energy + 10)/ w& D: b# J4 k6 @5 d5 ^
]
7 m/ I2 G& L' ?- Z7 j ifelse show-energy?
/ K- t. c* f2 {( _4 {7 N [ set label energy ]7 K5 _. U. e: {! d- b
[ set label "" ]6 _* T6 C F# G5 M5 c. _1 I
]8 @+ ~$ w$ B6 V) C8 J' r
end1 \' \# l" T; b3 p$ F3 X* i
to reproduce1 L8 L) W. W, A$ M" I
ask turtles [) K5 T. R2 ~: `3 X1 U; Q
if energy > 50 [
, t0 H+ ?& J4 S% t set energy energy - 508 i+ k3 e) A" ?3 [* K: V5 \2 |! w! i7 O
hatch 1 [ set energy 50 ]% G/ Q' ~: |; l
]! n" N+ [0 [$ Y+ h. i% g1 ^
]
* R' f" \3 A5 z& {# xend
! j f7 W" N- c' |to check-death! U; X8 P2 H' L8 W* f, M
ask turtles [
" l9 d: r/ H3 X- `$ }. m: l if energy <= 0 [ die ]
" B) m6 ?/ x$ B- m+ E0 ? ]3 U, d. t# l* N% Y
end
* j8 [* y; d: R6 X1 a3 sto regrow-grass2 ?. ^2 K3 v. p8 u. |8 R$ |3 U
ask patches [
# q8 \* S5 u" A5 b$ O if random 100 < 3 [ set pcolor green ]
8 }( m2 [5 H7 z! }4 r, } ]6 B1 q6 ]& t Z4 _
end
8 z+ V8 [/ c7 E( e3 D9 tto do-plots9 l+ @( l/ `; I- w Z
set-current-plot "Totals"# ]+ m9 c! M% c: S
set-current-plot-pen "turtles", b7 R& y# J* ?* v' \# |( j5 U- `
plot count turtles
( m5 I' [5 x h) h set-current-plot-pen "grass"% \" W- O0 u& Q5 X* A9 [
plot count patches with [pcolor = green]
# ^! d* p' x7 ]% i0 S* Zend1 I7 m) |/ J7 \- K7 {
可是运行时提示no such plot: "Totals"
5 k$ c5 w% y6 E. verror while observer running SET-CURRENT-PLOT
: ?- q6 l- _( ]8 f* J0 X! i called by procedure DO-PLOTS9 l) c/ q) @( D$ z
called by procedure SETUP$ E1 t% o2 X; O( H9 n
called by 按钮 'setup'8 `+ L1 H! z0 q& O
求大神解答啊 |