Example lpex6.c

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• In the main routine, the arrays cstat and rstat set the status of the initial basis.
• After the problem data has been copied into the problem object, the basis is copied by a call to CPXcopybase.
• After the problem has been optimized, the iteration count is printed. For the given data and basis, the basis is optimal, so no iterations are required to optimize the problem.

The application begins with declarations of arrays to store the solution of the problem. Then, before it calls any other ILOG CPLEX routine, the application invokes the Callable Library routine CPXopenCPLEX to initialize the ILOG CPLEX environment. After the environment has been initialized, the application calls other ILOG CPLEX Callable Library routines, such as CPXsetintparam with the argument CPX_PARAM_SCRIND to direct output to the screen and most importantly, CPXcreateprob to create the problem object. The routine populatebycolumn builds the problem object, and as noted earlier, CPXcopybase copies the advanced starting basis.

Before the application ends, it calls CPXfreeprob to free space allocated to the problem object and CPXcloseCPLEX to free the environment.