home | help 
std::ios_base::seekdir(3)      C++ Standard Libary     std::ios_base::seekdir(3)

NAME
     std::ios_base::seekdir - std::ios_base::seekdir

Synopsis
	typedef /*implementation defined*/ seekdir;
	static constexpr seekdir beg = /*implementation defined*/

	static constexpr seekdir end = /*implementation defined*/

	static constexpr seekdir cur = /*implementation defined*/

	Specifies  file  seeking direction type. The following constants are de-
     fined:

	Constant Explanation
	beg	 the beginning of a stream
	end	 the ending of a stream
	cur	 the current position of stream position indicator

Example
     // Run this code

      #include <iostream>
      #include <sstream>
      #include <string>

      int main()
      {
	  std::istringstream in("Hello, World!");
	  std::string word1, word2, word3, word4, word5;

	  in >> word1;
	  in.seekg(0, std::ios_base::beg); // <- rewind
	  in >> word2;
	  in.seekg(1, std::ios_base::cur); // -> seek from cur	pos  toward  the
     end
	  in >> word3;
	  in.seekg(-6, std::ios_base::cur); // <- seek from cur pos (end) toward
     begin
	  in >> word4;
	  in.seekg(-6, std::ios_base::end); // <- seek from end toward begin
	  in >> word5;

	  std::cout << "word1 = " << word1 << '\n'
		    << "word2 = " << word2 << '\n'
		    << "word3 = " << word3 << '\n'
		    << "word4 = " << word4 << '\n'
		    << "word5 = " << word5 << '\n';
      }

Output:
      word1 = Hello,
      word2 = Hello,
      word3 = World!
      word4 = World!
      word5 = World!

See also
	seekg	   sets the input position indicator
		   (public member function of std::basic_istream<CharT,Traits>)
	seekp	   sets the output position indicator
		   (public member function of std::basic_ostream<CharT,Traits>)
	pubseekoff invokes seekoff()
		   (public     member	  function     of     std::basic_stream-
     buf<CharT,Traits>)

http://cppreference.com 	   2024.06.10	       std::ios_base::seekdir(3)
home | help