lingo程序代码问题,求修改及结果答:SETS:PRODUCT/A,B,C/;DISTCTR/DC1,DC2/:F;CUSTOMER/C1,C2,C3,C4,C5/;DEMLINK(PRODUCT,CUSTOMER):D;!indicated by Z;ZLINK(PRODUCT,DISTCTR,CUSTOMER):Z;!X=tons shipped.;CLINK(PRODUCT,DISTCTR):C,X;GLINK(PRODUCT,DISTCTR,CUSTOMER):G;ENDSETS DATA:C=3,3.5,3.5,3,3.5,3;F=...