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Home » Tip Bank » C++
Language: C++
Expertise: Intermediate
Jul 19, 2004

The Difference Between #include <iostream> and #include

If a compiler supports both <iostream> and <iostream.h>, the headers are subtly different. In particular, if you include <iostream>, you get the elements of the iostream library enclosed within the namespace std. If you include <iostream.h>, you get those same elements at global scope.

Getting them at global scope can lead to name conflicts—precisley the kinds of name conflicts the use of namespaces is designed to prevent.

Kapila Deepak
 
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