std::basic_ios::clear

Parameters

state

An object of type ios_base::iostate that can take as value any combination of the following state flag member constants:

iostate value (member constants)	indicates	functions to check state flags
		good()	eof()	fail()	bad()	rdstate()
goodbit	No errors (zero value iostate)	true	false	false	false	goodbit
eofbit	End-of-File reached on input operation	false	true	false	false	eofbit
failbit	Logical error on i/o operation	false	false	true	false	failbit
badbit	Read/writing error on i/o operation	false	false	true	true	badbit

eofbit, failbit and badbit are member constants with implementation-defined values that can be combined (as if with the bitwise OR operator).
goodbit is zero, indicating that none of the other bits is set.

Return Value

Example

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// clearing errors
#include <iostream>     // std::cout
#include <fstream>      // std::fstream
int main () {
  char buffer [80];
  std::fstream myfile;
  myfile.open ("test.txt",std::fstream::in);
  myfile << "test";
  if (myfile.fail())
  {
    std::cout << "Error writing to test.txt\n";
    myfile.clear();
  }
  myfile.getline (buffer,80);
  std::cout << buffer << " successfully read from file.\n";
  return 0;
}

Data races

Exception safety

See also

basic_ios::fail

Check whether failbit or badbit is set (public member function)

basic_ios::good

Check whether state of stream is good (public member function)

basic_ios::bad

Check whether badbit is set (public member function)

basic_ios::eof

Check whether eofbit is set (public member function)

basic_ios::rdstate

Get error state flags (public member function)