运输问题lingo程序有一处错误…………
file:///C:\Users\Administrator\AppData\Roaming\Tencent\Users\631202694\QQ\WinTemp\RichOle\`3I%GCX8277file:///C:\Users\Administrator\AppData\Roaming\Tencent\Users\631202694\QQ\WinTemp\RichOle\`3I%GCX8277!运输问题，4个产地，8个销地，每个产地生产成本已知，销地利润已知，运费已知，求最大利润的问题;MODEL:
sets:
warehouse/1..4/:a,p; !供应商，a1,a2,a3,a4,成本p;
customer/1..8/:b,s; !销售商，b1,b2,b3,b4,b5,b6,b7,b8，利润s;
routes(warehouse,customer):c,x; !运输路线;
endsets
data:
a=12 16 16 20;
b=6 5 8 10 6 5 8 6;
c=2 11 3 4 12 16 22 26
10 3 5 9 15 18 24 35
7 8 1 2 8 13 33 48
12 9 16 7 16 21 42 56;
p=92 88 90 86;
s=105 110 108 105 110 112 126 132;
enddata
max = @sum((customer(j):s(j))*@sum(warehouse(i):x(i,j)))
-@sum(warehouse(i):p(i))*@sum(customer(j):x(i,j))
-@sum(routes:c*x);
@for(warehouse(i):
@sum(customer(j):x(i,j))<=a(i));
@for(customer(j):
@sum(warehouse(i):x(i,j))= b(j));
END
就是红色的那一行有错误
max = @sum(customer(j):s(j)*@sum(warehouse(i):x(i,j)))
-@sum(warehouse(i):p(i)*@sum(customer(j):x(i,j)))
-@sum(routes:c*x);
改成这样的就没有问题了，主要是后面的x(i,j)它的两个指标i，j的范围不确定，你具体说说是怎样的一个目标函数，我估计改的应该是符合你的要求的。
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