CPXaddqconstr

public int 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 * lname_str)

Definition file: 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 righthand 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-to or greater-than-or-equal-to 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.
lname_str	The name of the constraint to be added. May be NULL, in which case the new constraint is assigned a default name if the quadratic constraints already resident in the CPLEX problem object have names; otherwise, no name is associated with the constraint.

Returns:

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