CPXaddqconstr

int CPXPUBLIC CPXaddqconstr(CPXCENVptr env, CPXLPptr lp, int linnzcnt, int quadnzcnt, double rhs, int sense, const int * linind, const double * linval, const int * quadrow, const int * quadcol, const double * quadval, const char * constrname_str)

Definition file: cplex.h

Include files: cplex.h

The routine CPXaddqconstr adds a quadratic constraint to a specified CPLEX problem object. This routine may be called any time after a call to CPXcreateprob.

Codes for sense of constraints in QCPs
`sense[i]`	= `'L'`	≤ constraint
`sense[i]`	= `'G'`	≥ constraint

Example

 status = CPXaddqconstr (env, lp, linnzcnt, quadnzcnt, rhsval,
                         sense, linind, linval,
                         quadrow, quadcol, quadval, NULL);

See also the example qcpex1.c in the ILOG CPLEX User's Manual and in the standard distribution.

Parameters:

env	A pointer to the CPLEX environment as returned by `CPXopenCPLEX`.
lp	A pointer to a CPLEX problem object as returned by `CPXcreateprob`.
linnzcnt	An integer that indicates the number of nonzero constraint coefficients in the linear part of the constraint. This specifies the length of the arrays `linind` and `linval`.
quadnzcnt	An integer that indicates the number of nonzero constraint coefficients in the quadratic part of the constraint. This specifies the length of the arrays `quadrow, quadcol` and `quadval`.
rhs	The right-hand side term for the constraint to be added.
sense	The sense of the constraint to be added. Note that quadratic constraints may only be less than or equal or greater than or equal constraints. See the discussion of QCP in the ILOG CPLEX User's Manual.
linind	An array that with `linval` defines the linear part of the quadratic constraint to be added.
linval	An array that with `linind` defines the linear part of the constraint to be added. The nonzero coefficients of the linear terms must be stored in sequential locations in the arrays `linind` and `linval` from positions `0` to `linnzcnt-1`. Each entry, `linind[i]`, indicates the variable index of the corresponding coefficient, `linval[i]`. May be NULL; then the constraint will have no linear terms.
quadrow	An array that with `quadcol` and `quadval` defines the quadratic part of the quadratic constraint to be added.
quadcol	An array that with `quadrow` and `quadval` defines the quadratic part of the quadratic constraint to be added.
quadval	An array that with `quadrow` and `quadcol` define the quadratic part of the constraint to be added. The nonzero coefficients of the quadratic terms must be stored in sequential locations in the arrays `quadrow, quadcol` and `quadval` from positions `0` to `quadnzcnt-1`. Each pair, `quadrow[i], quadcol[i]`, indicates the variable indices of the quadratic term, and `quadval[i]` the corresponding coefficient.

Returns:

The routine returns zero on success and nonzero if an error occurs.