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What is the difference between iostream and iostream.h in C++?
Here we will see what are the differences between iostream and iostream.h in C++. The iostream.h was a header file used by the early 1990's I/O streams library. This was developed at AT&T for use with early C++. In that time C++ was not standardized.
iostream header file used by the C++ standard library. This is first published in 1998, to provide access to standard I/O streams.
There was never a C++ standard that made any mention of "iostream.h", but pre-standard references, such as Annotated C++ Reference Manual from 1990 did use that header file.
Updated on: 30-Jul-2019
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