检测流上的错误

[c]代码库

#include <stdio.h>

int main ( void )
{
	FILE *stream;

	/* open a file for writing */
	stream = fopen ( "DUMMY.FIL", "w" );

	/* force an error condition by attempting to read */
	( void ) getc ( stream );

	if ( ferror ( stream ) )  /* test for an error on the stream */
	{
		/* display an error message */
		printf ( "Error reading from DUMMY.FIL\n" );

		/* reset the error and EOF indicators */
		clearerr ( stream );
	}

	fclose ( stream );
	return 0;
}