Which term denotes the output file stream in file operations?

In file operations, the term that denotes the output file stream is "fout." This specific term represents an object or a stream used to write data to files. When you declare an output file stream in a programming context, particularly in C++ for instance, you typically use the ofstream class. The convention is to use variable names such as "fout" to indicate that this stream is specifically for output purposes.

The other terms are associated with different functionalities. "fin" is often a shorthand for an input file stream, commonly used to represent reading from files. "ifstream" is the actual class in C++ that facilitates input file operations. "fstream" is a more general stream that supports both input and output operations. Therefore, while all these terms are relevant in file operations, "fout" uniquely identifies the stream dedicated specifically to outputting data to files.