Fatal error C1083: Cannot open include file: ‘iostream.h’: No such file or directory when trying to compile your C / C++ code

This is a common mistake among C programmers who start coding in a new environment with a new compiler such as .NET 1.1 or .NET 2.0. You get the error because the iostream.h file is no longer used with these compilers, instead use the ISO compliant file iostream:

#include <iostream>;