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GRBgetgenconstrExpA

int	GRBgetgenconstrExpA (	GRBmodel	*model,
		int	id,
		int	*xvarP,
		int	*yvarP,
		double	*aP )

Retrieve the data associated with a general constraint of type EXPA. Calling this method for a general constraint of a different type leads to an error return code. You can query the GenConstrType attribute to determine the type of the general constraint.

See also GRBaddgenconstrExpA for a description of the semantics of this general constraint type.

Return value:

A non-zero return value indicates that a problem occurred while retrieving the data of the general constraint. Refer to the Error Code table for a list of possible return values. Details on the error can be obtained by calling GRBgeterrormsg.

Arguments:

model: The model to which the new general constraint should be added.

id: The index of the general constraint to retrieve.

Note that any of the following arguments can be NULL.

xvarP: The index of variable $x$ .

yvarP: The index of variable $y$ .

aP: The base of the function.

Example usage:

  int type;
  int xvar;
  int yvar;
  double a;

  error = GRBgetintattrelement(model, GRB_INT_ATTR_GENCONSTRTYPE, 3, &type);
  if (type == GRB_GENCONSTR_EXPA) {
    error = GRBgetgenconstrExpA(model, 3, &xvar, &yvar, &a);
  }