程序 mode l 6发点8收点运输问题; sets warehouses/whl.wh6/: capacity vendors/v1.v8/: demand links (warehouses, vendors): cost, volume endsets !目标函数; min=@sum (links: cost*vo lume) 需求约束; @for(vendors (j) @sum(warehouses(i): volume(i,j))=demand(u))i 产量约束 @for(warehouses(i): @sum(vendors(J): volume(I, J))<=capacity (i))i !数据部分; data capacity=605551434152; demand=3537223241324338; cost=62674295 49538582 52197433 76739271 23957265 55228143; enddata程序： model: !6发点8收点运输问题; sets: warehouses/wh1..wh6/: capacity; vendors/v1..v8/: demand; links(warehouses,vendors): cost, volume; endsets !目标函数; min=@sum(links: cost*volume); !需求约束; @for(vendors(J): @sum(warehouses(I): volume(I,J))=demand(J)); !产量约束; @for(warehouses(I): @sum(vendors(J): volume(I,J))<=capacity(I)); !数据部分; data: capacity=60 55 51 43 41 52; demand=35 37 22 32 41 32 43 38; cost=6 2 6 7 4 2 9 5 4 9 5 3 8 5 8 2 5 2 1 9 7 4 3 3 7 6 7 3 9 2 7 1 2 3 9 5 7 2 6 5 5 5 2 2 8 1 4 3; enddata end