lingo错误代码1017,
//源程序//
model:
sets:
quarters/1,2,3,4/:dem,rp,op,inv;
endsets
data:
dem=40,65,75,25;
enddata
min=@sum(quarters(i):400*rp(i)+450*op(i)+25*inv(i));
@for(quarters(i):rp(i)