basic_istream::unget
Puts the most recently read character back into the stream.
basic_istream<Elem, Tr>& unget( );
Return Value
The stream (*this).
Remarks
The unformatted input function puts back the previous element in the stream, if possible, as if by calling rdbuf ->sungetc. If rdbuf is a null pointer, or if the call to sungetc returns traits_type::eof, the function calls setstate(badbit). In any case, it returns *this.
For information on how unget might fail, see basic_streambuf::sungetc.
Example
// basic_istream_unget.cpp
// compile with: /EHsc
#include <iostream>
using namespace std;
int main( )
{
char c[10], c2;
cout << "Type 'abc': ";
c2 = cin.get( );
cin.unget( );
cin.getline( &c[0], 9 );
cout << c << endl;
}
abc
Type 'abc': abc
abc
Requirements
Header: <istream>
Namespace: std