std::basic_istream::ignore
From cppreference.com
< cpp | io | basic istream
| basic_istream& ignore( std::streamsize count = 1, int_type delim = Traits::eof() ); |
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Extracts and discards characters from the input stream until and including delim.
First, constructs a std::basic_istream::sentry object with noskipws set to true. Afterwards, if good()==false, calls setstate(failbit) and returns. Otherwise, extracts characters from the stream and discards them until any one of the following conditions occurs:
- count characters were extracted (this test is disabled in the special case when count equals std::numeric_limits<std::streamsize>::max()
- end of file conditions occurs in the input sequence (in which case the function calls setstate(eofbit)
- the next available character c in the input sequence is delim as determined by Traits::eq_int_type(Traits::to_int_type(c), delim). The delimiter character is extracted and discarded (this test is disabled if delim is Traits::eof())
Contents |
[edit] Parameters
| count | - | number of characters to extract |
| delim | - | delimiting character to stop the extraction at. It is also extracted. |
[edit] Return value
*this
[edit] Example
#include <iostream> #include <sstream> #include <limits> int main() { std::istringstream input("1\n" "some non-numeric input\n" "2\n"); for(;;) { int n; input >> n; if(input.eof() || input.bad()) break; else if(input.fail()) { input.clear(); // unset failbit input.ignore(std::numeric_limits<std::streamsize>::max(), '\n'); // skip bad input } else std::cout << n << '\n'; } }
Output:
1 2
[edit] See also
| extracts characters (public member function) | |
| extracts characters until the given character is found (public member function) | |
