The IRLE notes that blue collar and manual workers can be replaced for an average cost of $2,000, while the average cost for managerial and professional employees may be as high as $7,000.
By defining a Node * typedef, it is assured that all the variables will be structure pointer types, or say, that each variable is a pointer type pointing to a structure type.
a data adapter dataadapter class is an object used to exchange data between a data source and a data set in other words a data adapter is used to read data from a data source into a data set as well as writing changed data from the data set back to the data source