我编的程序如下turtles-own [energy]
* {. F1 w- ^8 ]" }8 nto setup
* E6 ?+ Q) L$ }6 M4 f clear-all
" J+ R% f. u w8 a+ } setup-patches8 o: V$ w! |# F; X' I
create-turtles 100& }- t- R- G3 L
do-plots% e- l$ ? F! O" |2 A) v
ask turtles [ setxy random-xcor random-ycor ]6 r% _9 j& c7 Q) [- s* G1 L. z, I
end
) S( g# B$ h1 R9 {% k7 d. m. g+ A% Ito go/ y! ~# K* C; y0 u8 ~8 k; m
move-turtles% g- d6 A- I ?5 y
eat-grass
7 i( v9 k* \/ C6 @8 U; ] reproduce
" q- Y1 o" i8 X2 _' c check-death
2 r# f% r7 G% q3 d' @8 H% O, S regrow-grass
& R& `$ l5 D; e. d3 o f* y do-plots9 k; Y) x/ O: ^4 O/ x
end
* Q* d5 `& u/ h; |to move-turtles& k9 H! [" g1 P
ask turtles [
3 E; n0 ^7 h; k7 p right random 360
8 Q5 {$ J" G4 s+ T6 ~ forward 1
8 k2 I( J- m) p' l set energy energy - 1. S% w. X$ w; b% H/ \, v
]
& K' V1 A& y5 n" g# ]3 y( U1 ]( [end7 c9 W, B4 }, V3 M8 j/ W
to setup-patches
1 v6 M: F% W- i' x# q ask patches [ set pcolor green ]
) {, k/ }9 y5 F8 I1 A3 K& xend5 w8 t6 G, p$ o. d9 H* c
to setup-turtles' R. t; `1 P( m! Y+ w$ `
create-turtles 100/ Y: q5 h" ^" h, `3 B/ E2 P2 i
ask turtles [ setxy random-xcor random-ycor ]
. ?7 s5 E2 H) mend
; m& A1 |4 ^# F0 `4 m+ a3 lto eat-grass8 z: r. t. I! E! R4 z* @3 I
ask turtles [2 _* W9 d$ a# N- _6 d* }
if pcolor = green [
7 E( z1 u6 [8 L; e6 K( P, ` w set pcolor black
; I- _2 o. ~% q$ x; l+ K9 ? set energy (energy + 10)4 a" `7 R$ C' e: z' M1 c! p+ L
]
1 J+ c0 i, W% r4 x: J1 c ifelse show-energy?" }' f+ `" q" @+ m2 r5 Q
[ set label energy ]$ s) `* e# C- {
[ set label "" ]
4 w! m' t2 Q) z/ `3 w+ ^5 c4 g ]
2 @' Q8 \7 `* a; h" m6 V/ nend
3 J, E; E) \0 i; ?% R; Hto reproduce4 S0 v& \6 f0 \1 i
ask turtles [
# T3 T9 N& k. u1 k. E1 ? if energy > 50 [* Z" Z \. e- i3 a4 {
set energy energy - 50) I9 x. w& B% I2 I) p% r
hatch 1 [ set energy 50 ]
Z* I5 Z B3 K ]" t2 }5 j6 S) J4 w& Q7 d# K
]
j# S6 F3 Q+ o/ [; wend
# f) k9 W/ Z: I8 M# a4 rto check-death5 ^& y9 Y/ G! `* W) ~: b4 z- ~) s
ask turtles [
0 f5 P9 Y% d# ?: J% W3 m if energy <= 0 [ die ]+ @/ v" x4 U' H+ g; h) R' W: ?4 B
]% c" u% E2 H. ]
end
6 d- A) K2 O& V7 q1 I9 l P2 Rto regrow-grass
+ s2 n1 R/ J- A7 @0 ?$ b6 v ask patches [
0 ~8 \: l* J2 O% o: V if random 100 < 3 [ set pcolor green ]
6 {+ u3 u$ n/ Y$ N, v4 G ]# i2 x9 q2 M- m% Z/ [# x
end+ s) F& ^; X6 H! D8 q: E4 ~
to do-plots
: r* j4 v7 \) q set-current-plot "Totals": B( n/ f: ~5 \- k6 n6 f/ D2 U" a; x
set-current-plot-pen "turtles"/ _5 h8 B W1 E+ C+ F0 u
plot count turtles
1 ?/ d5 R$ {2 j9 F J set-current-plot-pen "grass"
3 w9 z- V2 U; \- S" j plot count patches with [pcolor = green]
+ b8 P+ R: Y7 v* q& p% |' bend) M) w5 o% S5 B& d+ t' r$ p
可是运行时提示no such plot: "Totals"
: u6 a& H f; g1 Cerror while observer running SET-CURRENT-PLOT
' x% q2 g, R4 ?5 N* A# _3 L9 | called by procedure DO-PLOTS! c# O" i& _+ [4 k+ X7 n# a3 I
called by procedure SETUP& w9 N; Z" i+ W% r5 ]+ V. b
called by 按钮 'setup'9 {6 k- ]3 u) p! D* ]2 m
求大神解答啊 |