我编的程序如下turtles-own [energy]
( ~5 m$ Y3 a) z0 ]; K, }" S7 @to setup
4 R5 Y1 c h9 g! ^2 Z* p5 h clear-all' A ^) h/ h3 Q2 F- x
setup-patches
2 k: s% p9 {: g. q$ N, t7 m& J create-turtles 100
; t+ W+ M4 d7 y; k. W7 { do-plots( @' |5 E4 o5 E. e6 [- ~
ask turtles [ setxy random-xcor random-ycor ]+ y# D- L5 J; b" Y
end- L* h# E' J" h$ y4 F) O
to go9 V9 v! |1 {, \
move-turtles* a8 Q- @6 o2 v% C: ?/ b9 \: e1 _
eat-grass
! ]; h; R9 F7 a% K, L0 o* U reproduce
~/ ?# O7 Y9 G: p1 n7 K" w check-death
% J, u3 e0 {- Q6 l/ |; L9 N regrow-grass
& ~; L8 G5 d }. h3 ^% V3 \0 K# f* x, L do-plots
3 P2 ~3 }; A- g: _6 t4 ]! ^) Tend8 g* j" j; l% _" S+ J7 u$ K
to move-turtles9 y5 R9 j: g3 m2 }/ b" a
ask turtles [+ \" }' N1 ?$ \8 S
right random 360
8 z% N5 s$ v8 y) |8 u& y; Y forward 1& z1 A1 J. A9 }. R; t# N
set energy energy - 1: ?0 V2 G* n, ?2 A5 r
]
1 p/ B1 b5 J' V) xend
) c3 ]" m# n$ R# \to setup-patches9 [; ~& e- I- w
ask patches [ set pcolor green ]
$ |' Z: V' Z9 j5 ?. a5 Oend3 q: \0 ]1 h/ C% d6 d
to setup-turtles
" g# z! ^: X" S+ L8 x create-turtles 100
. A" ^5 R) z5 [7 ] ask turtles [ setxy random-xcor random-ycor ]5 v' U4 S/ O' `% C& A, x W$ \9 \! @
end
, _) e0 R% o$ N) |$ Sto eat-grass
5 E# Q3 o U+ { ask turtles [
: C8 [: D+ F2 p0 `( v0 g if pcolor = green [
* }/ B4 R: `! V2 F set pcolor black7 H+ d' c# i n* r n
set energy (energy + 10)3 k, T/ W) { o* x& W7 _, Y7 X% z
]1 K! ^, v A; Q
ifelse show-energy?
! K. }/ s# Q6 X% r+ z$ v [ set label energy ]
3 S4 n1 w* \- z6 A2 ~9 y5 A% d [ set label "" ]" S% s: j3 L& |$ L3 I
]; a* O- _5 b6 q* C
end
6 R3 J0 g, h- V- ito reproduce
! b* G1 E# }/ n/ w9 T' E5 ] ask turtles [
! E$ Z8 f3 b: F; q/ t1 ~2 l) N. P if energy > 50 [
$ e/ b, h) S- A; s+ O; d set energy energy - 504 j3 r7 s7 k" {" S: [' S# B; @
hatch 1 [ set energy 50 ]" {( ] W; R$ [0 W( A
]4 k7 G" S' e# E: b! U- \
]
% i* f# B+ ]. l$ u5 P% kend' o+ A/ N9 \3 J
to check-death* A3 V7 e' Y1 N9 T {
ask turtles [
! I: W# ~( k6 v: O! ] V6 D7 K! A if energy <= 0 [ die ]
" D, j& R* X+ F ]
V9 i& O4 N& y1 uend
$ M$ _2 C- f& g& q6 e/ u. Kto regrow-grass
9 l6 n3 m( k8 j* L* }6 O1 t, U ask patches [
# |) P3 l3 G0 p8 c K if random 100 < 3 [ set pcolor green ]
# _. k8 x1 g2 {( l ]
% o4 p3 G+ P: e, D5 t) Gend
0 a. }0 L, r1 {; wto do-plots: O+ v8 M( `% a( m; x# r! K
set-current-plot "Totals"+ Y& A9 C5 c' X u' c" [% f
set-current-plot-pen "turtles"6 ?* Q% o) ~4 }
plot count turtles
. X# |, ]+ t( k( v' [7 g set-current-plot-pen "grass") j! D# I5 E5 Z0 {. T7 U5 Q
plot count patches with [pcolor = green]
- Q. a. e3 c* t0 Lend2 [* y6 p& {- k
可是运行时提示no such plot: "Totals"
6 ?" s, y$ K9 u% herror while observer running SET-CURRENT-PLOT
5 ]; w" \) Z$ s$ p4 ~% F) n' ~ called by procedure DO-PLOTS5 ]/ ^2 P2 X. \! Y. z2 E4 f) E
called by procedure SETUP8 M9 ~ t! Z( I+ ~- q- H$ y
called by 按钮 'setup'# |% u2 p$ W0 B% ]$ v/ J% ?
求大神解答啊 |