Question

用lingo求解下面程序时老出现error code50（for函数用错了）,但是没错误啊,

Answer 1

model:

sets:

wh/wh1..wh6/:capacity;

ven/v1..v8/:demand;

links(wh,ven):cost,volume;

endsets

min=@sum(links(i,j):

cost(i,j)*volume(i,j));

@for(ven(j):

@sum(wh(i):volume(i,j))=demand(j));

@for(wh(i):

@sum(ven(j):volume(i,j))