std::basic_ios::clear
From cppreference.com
void clear( std::ios_base::iostate state = std::ios_base::goodbit );
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Clears the stream error state flags by assigning them the value of state
. If rdbuf() == 0 then state | badbit is assigned. May throw an exception.
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[edit] Parameters
state | - | new error state flags setting. It can be a combination of the following constants:
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[edit] Return value
(none)
[edit] Example
clear() without arguments can be used to unset the failbit after unexpected input
Run this code
#include <iostream> #include <string> int main() { double n; while( std::cout << "Please, enter a number\n" && ! (std::cin >> n) ) { std::cin.clear(); std::string line; std::getline(std::cin, line); std::cout << "I am sorry, but '" << line << "' is not a number\n"; } std::cout << "Thank you for entering the number " << n << '\n'; }
[edit] See also
sets state flags (public member function) |
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returns state flags (public member function) |