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Tip of the Day
Language: C++
Expertise: Beginner
Jan 28, 1999

Standard Streams

C++ provides four standard I/O streams that are automatically instantiated before program's outset. They are defined in the standard header <iostream>:
 
cin    // standard input stream of char
cout  // standard output stream of char 
cerr  // standard unbuffered output stream for error messages
clog  // standard output stream for error messages
The difference between cerr and clog is that cerr is unbuffered, whereas clog is buffered. In addition, each of these four streams has a corresponding wide character version:
 
wcin 
wcout 
wcerr 
wclog 
Danny Kalev
 
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