Originally posted by: arronlee11

i have modeled in column form,and caling cplex with c++;

i have finished modeling ,there are two decision (x and y)variable in my problem,now I want to give some initial values to the decision variables x，how should i do?

Do you have any integer variables in your model? If so use IloCplex::addMIPStart(), otherwise use IloCplex::setStart() or IloCplex::setBasisStatuses().

Originally posted by: arronlee11

thank you for your reply,the two decision variable is defined as follow:

they are Continuous decision variable，actually i'm using the column generation algorithm,the master problem have thess two decision varible,i have modeled master problem in column forms,and i wan't to add some known value  of x in forms of constraint;how should i do?

To add constraints just use IloModel::add(). For example, model.add(x[j] == 5) will fix x[j] to 5.

Originally posted by: arronlee11

thank you for your reply, it's very usefull for me!