NAME¶

std::clearerr - std::clearerr

Synopsis¶

Defined in header <cstdio>
void clearerr( std::FILE* stream );

Resets the error flags and the EOF indicator for the given file stream.

Parameters¶

stream - the file to reset the error flags for

Return value¶

(none)

Example¶

// Run this code

#include <cassert>
#include <cstdio>

int main()
{
std::FILE* tmpf = std::tmpfile();
std::fputs("cppreference.com\n", tmpf);
std::rewind(tmpf);

for (int ch; (ch = std::fgetc(tmpf)) != EOF; std::putchar(ch)) { }

assert(std::feof(tmpf)); // the loop is expected to terminate by EOF
std::puts("End of file reached");

std::clearerr(tmpf); // clear EOF

std::puts(std::feof(tmpf) ? "EOF indicator set"
: "EOF indicator cleared");
}

Output:¶

cppreference.com
End of file reached
EOF indicator cleared

See also¶

feof checks for the end-of-file
(function)
perror displays a character string corresponding of the current error to stderr
(function)
ferror checks for a file error
(function)
C documentation for
clearerr