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# std::resetiosflags

From cppreference.com
< cpp‎ | io‎ | manip

Defined in header `<iomanip>` |  |
/*unspecified*/ resetiosflags( std::ios_base::fmtflags mask ); |  |

When used in an expression out << resetiosflags(mask) or in >> resetiosflags(mask), clears all format flags of the stream `out` or `in` as specified by the `mask`.

### [edit] Parameters

mask | - | bitmask of the flags to clear

### [edit] Return value

Returns an object of unspecified type such that if `str` is the name of an output stream of type std::basic_ostream<CharT, Traits> or std::basic_istream<CharT, Traits>, then the expression str << resetiosflags(mask) or str >> resetiosflags(mask) behaves as if the following code was executed:

str.setf(std::ios_base::fmtflags(0), mask);

### [edit] Example

Run this code

    #include <sstream>
    #include <iostream>
    #include <iomanip>
    int main()
    {
        std::istringstream in("10 010 10 010 10 010");
        int n1, n2;
        in >> std::oct >> n1 >> n2;
        std::cout << "Parsing \"10 010\" with std::oct gives:  " << n1 << ' ' << n2 << '\n';
        in >> std::dec >> n1 >> n2;
        std::cout << "Parsing \"10 010\" with std::dec gives:  " << n1 << ' ' << n2 << '\n';
        in >> std::resetiosflags(std::ios_base::basefield) >> n1 >> n2;
        std::cout << "Parsing \"10 010\" with autodetect gives: " << n1 << ' ' << n2 << '\n';
    }

Output:

    Parsing "10 010" with std::oct gives:  8 8
    Parsing "10 010" with std::dec gives:  10 10
    Parsing "10 010" with autodetect gives: 10 8

### [edit] See also

setf | sets specific format flag (public member function of `std::ios_base`) [edit]
setiosflags | sets the specified ios_base flags (function) [edit]

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