This is especially important in pure C. If OOP-style programming is adopted, databaseRestore() can be strictly interpreted as a method of the Database class without ambiguity, and its first parameter is the object the operation is applied onto. In a sense, even old C & POSIX functions such as fopen(), fclose(), fseek() can be seen as a rudimentary form of OOP. On the other hand, restoreDatabase() may perform other operations that change the state outside of the database object.