operator<<,>>(std::complex)

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Technical Specifications

 

Numerics library

Common mathematical functions

Floating-point environment

Complex numbers

Numeric arrays

Pseudo-random number generation

Compile-time rational arithmetic (C++11)

Generic numeric operations

iota (C++11)

accumulate

inner_product

adjacent_difference

partial_sum

 

std::complex

Member functions
complex::complex
complex::operator=
complex::real
complex::imag
complex::operator+=complex::operator-=complex::operator*=complex::operator/=
Non-member functions
operator+operator- operator+operator-operator*operator/ operator==operator!= operator<<operator>>	real imag abs arg norm conj proj (C++11) polar operator""ioperator""ifoperator""il (C++14)(C++14)(C++14)
Exponential functions
exp
log
log10
Power functions
pow
sqrt
Trigonometric functions
sin cos tan	asin (C++11) acos (C++11) atan (C++11)
Hyperbolic functions
sinh cosh tanh	asinh (C++11) acosh (C++11) atanh (C++11)

 

Defined in header <complex>
template <class T, class CharT, class Traits> std::basic_ostream<CharT, Traits>&     operator<<(std::basic_ostream<CharT, Traits>& os,                const std::complex<T>& x);	(1)
template <class T, class CharT, class Traits> std::basic_istream<CharT, Traits>&     operator>>(std::basic_istream<CharT, Traits>& is,                std::complex<T>& x);	(2)

1) Writes to os the complex number in the form (real,imaginary).

2) Reads a complex number from is. The supported formats are

• real
• (real)
• (real,imaginary)

Where the input for real and imaginary must be convertible to T.

If an error occurs calls is.setstate(ios_base::failbit)

Exceptions

May throw std::ios_base::failure on stream errors.

Parameters

os	-	a character output stream
is	-	a character input stream
x	-	the complex number to be inserted or extracted

Return value

1) os

2) is

Notes

1) As the comma may be used in the current locale as decimal separator, the output may be ambiguous. This can be solved with std::showpoint which forces the decimal separator to be visible.

2) The input is performed as a series of simple formatted extractions. Whitespace skipping is the same for each of them.

Possible implementation

template<class T, class charT, class traits> basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& o, const complex<T>& x) { basic_ostringstream<charT, traits> s; s.flags(o.flags()); s.imbue(o.getloc()); s.precision(o.precision()); s << ’(’ << x.real() << "," << x.imag() << ’)’; return o << s.str(); }