Add new range constraints to a model. A range constraint states that the value of the input expression must be between the specified lower and upper bounds in any solution.

GRBConstr* addRanges ( const GRBLinExpr* exprs,
    const double* lower,
    const double* upper,
    const string* names,
    int count )

    exprs: Linear expressions for the new range constraints.

    lower: Lower bounds for linear expressions.

    upper: Upper bounds for linear expressions.

    name: Names for new range constraints.

    count: Number of range constraints to add.

    Return value:

    Array of new constraint objects. Note that the result is heap-allocated, and must be returned to the heap by the user.