std::uppercase, std::nouppercase

Defined in header <ios>
std::ios_base& uppercase( std::ios_base& str );
std::ios_base& nouppercase( std::ios_base& str );

Enables the use of uppercase characters in floating-point and hexadecimal integer output. Has no effect on input.

1) enables the uppercase flag in the stream str as if by calling str.setf(std::ios_base::uppercase).

2) disables the uppercase flag in the stream str as if by calling str.unsetf(std::ios_base::uppercase).

This is an I/O manipulator, it may be called with an expression such as out << std::uppercase for any out of type std::basic_ostream or with an expression such as in >> std::uppercase for any in of type std::basic_istream.


str - reference to I/O stream

Return value

str (reference to the stream after manipulation).


#include <iostream>
int main()
    std::cout << std::hex << std::showbase
              << "0x2a with uppercase: " << std::uppercase << 0x2a << '\n'
              << "0x2a with nouppercase: " << std::nouppercase << 0x2a << '\n'
              << "1e-10 with uppercase: " << std::uppercase << 1e-10 << '\n'
              << "1e-10 with nouppercase: " << std::nouppercase << 1e-10 << '\n';


0x2a with uppercase: 0X2A
0x2a with nouppercase: 0x2a
1e-10 with uppercase: 1E-10
1e-10 with nouppercase: 1e-10

See also

clears the specified ios_base flags
sets the specified ios_base flags

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