CS202 6- ‹#›
Function Call Operator
nAnother operator that is interesting to discuss is the (), function call operator.
nThis operator is the only operator we can overload with as many arguments as we want. We are not limited to 1, 2, 3, etc. In fact, the function call operator may be overloaded several times within the same scope with a different number (and/or type) of arguments.
nIt is useful for accessing elements from a multi-dimensional array:   matrix (row, col)   where the [] operator cannot help out as it takes 2 operands always, never 3!