数学建模——lingo实现整数规划

代码：

model:
sets:
var/1..5/;
link(var,var):c,x;
endsets
data:
c=3 8 2 10 3
  8 7 2 9 7
  6 4 2 7 5
  8 4 2 3 5
  9 10 6 9 10;
enddata
minz=@sum(link:c*x);
@for(var(i):@sum(var(j):x(i,j))=1);
@for(var(j):@sum(var(i):x(i,j))=1);

model:
sets:
var1/1..4/:y;
var2/1..3/:x,c;
endsets
maxz=4.8*(y(1)+y(2))+5.6*(y(3)+y(4))-@sum(var2:c*x);
y(2)+y(4)<1000;
y(1)+y(2)<500+@sum(var2:x);
0.5*(y(1)+y(2))<y(1);
0.6*(y(3)+y(4))<y(3);
(x(1)-500)*x(2)=0;
(x(2)-500)*x(3)=0;
@for(var2:@bnd(0,x,500));
data:
c=10 8 6;
enddata

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