Lingo建模语言与实例4

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目标与约束段
/ J- O& r! K4 ?- Q集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
8 ^+ [4 D. ]7 u* H（计算段 (CALC ENDCALC)）
8 u: w; D8 U/ B! XMODEL:
Title Location Problem;
# d/ n" ]$ \6 usets:
* a0 B: N! ^( x5 b    demand/1..6/:a,b,d;
6 F- T7 k# r4 j' m5 C! g8 Y    supply/1..2/:x,y,e;
    link(demand,supply):c;
endsets
; z- N4 R) C) h1 o. t+ d6 ?0 ^data:
& o4 }" _: u) ?6 a7 L0 Ca=1.25,8.75,0.5,5.75,3,7.25;
b=1.25,0.75,4.75,5,6.5,7.75;
8 ~# l$ M/ ^" G8 n2 }9 ?& ed=3,5,4,7,6,11; e=20,20;
enddata
& \& O7 f  K9 Z: K% i4 j; m% S0 ~+ `init:
3 h, O! R4 @6 G8 U5 L" qx,y=5,1,2,7;
endinit
" Y; Z& S- ?" |7 gmin=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
7 [+ r4 q6 K; b2 T* j! m. w@for(demand(i)sum(supply(j):c(i,j))=d(i););
! g' D% I5 i/ [1 A@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END

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好