Example: Reading a MIP Problem from a File

ILOG CPLEX 11.0 User's Manual > Discrete Optimization > Solving Mixed Integer Programming Problems (MIP) > Example: Reading a MIP Problem from a File

Example: Reading a MIP Problem from a File

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These examples show you how to solve a MIP with the Component Libraries when the problem data is stored in a file.

ilomipex2.cpp

This example derives from ilolpex2.cpp, an LP example explained in the manual ILOG CPLEX Getting Started. That LP example differs from this MIP example in these ways:

This example solves only MIPs, so it calls only IloCplex::solve, and its command line does not require the user to indicate an optimizer.
This example does not generate or print a basis.

Like other applications based on ILOG CPLEX Concert Technology, this one uses IloEnv env to initialize the Concert Technology environment and IloModel model(env) to create a problem object. Before it ends, it calls env.end to free the environment.

mipex2.c

The example derives from lpex2.c, an LP example explained in the manual ILOG CPLEX Getting Started. That LP example differs from this MIP example in these ways:

This example solves only MIPs, so it calls only CPXmipopt, and its command line does not require the user to indicate an optimizer.
This example does not generate or print a basis.

Like other applications based on the ILOG CPLEX Callable Library, this one calls CPXopenCPLEX to initialize the ILOG CPLEX environment; it sets the screen-indicator parameter to direct output to the screen and calls CPXcreateprob to create a problem object. Before it ends, it calls CPXfreeprob to free the space allocated to the problem object and CPXcloseCPLEX to free the environment.

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