ILOG CPLEX 11.0 Getting Started > Tutorials > Concert Technology Tutorial for C++ Users > Reading a Problem from a File: Example ilolpex2.cpp > Reading the Model from a File

The model is created by reading it from the file specified as the first command line argument argv[1]. This is done using the method importModel of an IloCplex object. Here the IloCplex object is used as a model reader rather than an optimizer. Calling importModel does not extract the model to the invoking cplex object. This must be done later by a call to cplex.extract(model). The objects obj, var, and rng are passed to importModel so that later on when results are queried the variables will be accessible.