LINGO程序问题sets:product /1..7/:capcity,value;need /1

网友回答

sets:product /1..7/:capcity,value;
need /1..14/:demand;
link(product,need):cost,number;
endsets
[email protected](link:cost*number)[email protected](product(i):value(i)*@sum(need(j):number(i,j)));
@for(link(i,j):@sum(link(i,j):number(i,j))=5171);
@sum(need(j):number(1,j))>=500;