我编的程序如下turtles-own [energy]
; \( l# N" S. }% X4 k( @! V+ N" i) Sto setup
6 g5 |7 s7 t4 a$ u/ k clear-all
. _! }% z8 A) G2 _2 o setup-patches$ _1 o! K3 M1 k9 ? e" m
create-turtles 100
2 A- l- F" f. i! p m do-plots/ N7 {, D+ |7 Z- ^% h8 y
ask turtles [ setxy random-xcor random-ycor ]% d5 o8 z4 B; F3 c
end
: V% Z6 g) Y2 T8 s/ H& K( K/ e" fto go5 Z7 _3 |9 v8 u7 `; }, S6 @
move-turtles) D" X+ `+ O% ~/ P1 k7 S9 Q
eat-grass
+ @1 H+ ]& o' @/ N6 | reproduce
" r5 R9 e: M8 y check-death P* t0 T2 C: _( L3 R+ \+ G, s6 b0 \8 s
regrow-grass' V1 u. Z& u# h! |1 S0 `( D
do-plots
4 \; K: c4 @$ U2 |; Qend
) j; L3 N/ {( L4 N9 w; Dto move-turtles
& t/ ~" r/ U4 r) X) J9 Q ask turtles [
4 Q$ B- Q2 p. E8 D+ i0 r right random 3607 x& X' k: g5 R
forward 1, W/ x* `) k3 d: W" Y
set energy energy - 1
+ ~6 e1 b" M3 e i ]
: ?1 i( M5 N7 Y! lend
2 o2 K: G7 X3 @8 D* a Jto setup-patches# Q: ^0 z: n8 I
ask patches [ set pcolor green ], V; ~7 l2 L- V2 F! b6 K6 A
end
4 |( P3 C! _2 ~! h( b( G# s! zto setup-turtles5 o* K7 [; P% g
create-turtles 100
& l7 o# A0 e7 I! \$ x- k ask turtles [ setxy random-xcor random-ycor ]
& P! r6 X' w+ w$ Rend
, E; \' J5 x# b9 z; A y% z, yto eat-grass ^8 L3 N& Z& F' e% ~$ T
ask turtles [, K" e0 M0 R% S' c2 b6 p5 T: n( S
if pcolor = green [
2 R6 T! U4 i9 q2 Q set pcolor black! O5 U. e( \) u8 L) ?* S
set energy (energy + 10)$ B" z; }- r/ i' g: T5 y
]
1 E2 m' u6 ?7 S5 I5 J7 c& I: h& }/ ` ifelse show-energy?+ I% R9 H6 g" s# \# r3 |
[ set label energy ]/ b- q! m( L+ z
[ set label "" ]
9 [ H% G8 Y$ W2 x8 Z4 |6 B ]) P( j5 T1 T7 P: m- L) D1 L& m
end
0 H5 h2 q- O9 H0 P& Wto reproduce) ?5 m' j1 b7 C- P
ask turtles [+ d$ M6 S! } L, r6 _! ~: w! A* K
if energy > 50 [
) G% a; V3 L" m0 t7 E" e1 m0 Q set energy energy - 50 t+ a. h; v' g. D! E& b
hatch 1 [ set energy 50 ]
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]
8 |1 N: n9 \# k4 C1 W, _3 u. \end! m* k3 k7 \. M$ q, u
to check-death' D$ E. I0 @7 V
ask turtles [9 A2 V8 ~- k: n, T4 f1 L' Y
if energy <= 0 [ die ]+ K' j1 E# _/ \' H9 G2 @
]6 ~+ |; @7 L9 f6 V2 Q3 K( Z
end
: h" ^ ?( o1 d3 ]to regrow-grass. a8 ^1 ]5 ~- T
ask patches [+ _9 W& L' s( w6 g. |1 ]
if random 100 < 3 [ set pcolor green ]0 P% R0 l/ Q2 p% a- ~8 D8 T; X
]
+ Z' e. e, e2 n- d" k* Vend1 Q5 ?6 r8 y* F5 a
to do-plots# S+ o4 s2 Z K |
set-current-plot "Totals"2 }. h( r6 Z+ h: d' }
set-current-plot-pen "turtles"
3 z: |; u: e. V m; Q A P3 S ^, \ plot count turtles7 D" W7 s5 F4 R3 ? g
set-current-plot-pen "grass"
: `0 I5 s( ?- e" L9 i; ~ plot count patches with [pcolor = green]* P2 W# d* I2 ?9 W* Y! [
end$ U+ ~$ h/ J3 N: p
可是运行时提示no such plot: "Totals"
6 v4 G! k; y$ G/ q. merror while observer running SET-CURRENT-PLOT
; e( ^4 o9 {( S4 r A) B called by procedure DO-PLOTS. ^/ x) y( ?. h) w1 k6 @. X
called by procedure SETUP* K* l+ B% Q( Z$ j, o
called by 按钮 'setup'9 b& S) a* ?+ M3 l% f2 i- C
求大神解答啊 |