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std::complex::operator+=,-=,*=,/=

From cppreference.com
< cpp‎ | numeric‎ | complex
primary template complex<T>
(1)
complex& operator+=(const T& other);
(until C++20)
constexpr complex& operator+=(const T& other);
(since C++20)
(2)
complex& operator-=(const T& other);
(until C++20)
constexpr complex& operator-=(const T& other);
(since C++20)
(3)
complex& operator*=(const T& other);
(until C++20)
constexpr complex& operator*=(const T& other);
(since C++20)
(4)
complex& operator/=(const T& other);
(until C++20)
constexpr complex& operator/=(const T& other);
(since C++20)
specialization complex<float>
(1)
complex& operator+=(float other);
(until C++20)
constexpr complex& operator+=(float other);
(since C++20)
(2)
complex& operator-=(float other);
(until C++20)
constexpr complex& operator-=(float other);
(since C++20)
(3)
complex& operator*=(float other);
(until C++20)
constexpr complex& operator*=(float other);
(since C++20)
(4)
complex& operator/=(float other);
(until C++20)
constexpr complex& operator/=(float other);
(since C++20)
specialization complex<double>
(1)
complex& operator+=(double other);
(until C++20)
constexpr complex& operator+=(double other);
(since C++20)
(2)
complex& operator-=(double other);
(until C++20)
constexpr complex& operator-=(double other);
(since C++20)
(3)
complex& operator*=(double other);
(until C++20)
constexpr complex& operator*=(double other);
(since C++20)
(4)
complex& operator/=(double other);
(until C++20)
constexpr complex& operator/=(double other);
(since C++20)
specialization complex<long double>
(1)
complex& operator+=(long double other);
(until C++20)
constexpr complex& operator+=(long double other);
(since C++20)
(2)
complex& operator-=(long double other);
(until C++20)
constexpr complex& operator-=(long double other);
(since C++20)
(3)
complex& operator*=(long double other);
(until C++20)
constexpr complex& operator*=(long double other);
(since C++20)
(4)
complex& operator/=(long double other);
(until C++20)
constexpr complex& operator/=(long double other);
(since C++20)
all specializations
(5)
template<class X>
complex& operator+=(const std::complex<X>& other);
(until C++20)
template<class X>
constexpr complex& operator+=(const std::complex<X>& other);
(since C++20)
(6)
template<class X>
complex& operator-=(const std::complex<X>& other);
(until C++20)
template<class X>
constexpr complex& operator-=(const std::complex<X>& other);
(since C++20)
(7)
template<class X>
complex& operator*=(const std::complex<X>& other);
(until C++20)
template<class X>
constexpr complex& operator*=(const std::complex<X>& other);
(since C++20)
(8)
template<class X>
complex& operator/=(const std::complex<X>& other);
(until C++20)
template<class X>
constexpr complex& operator/=(const std::complex<X>& other);
(since C++20)

Implements the compound assignment operators for complex arithmetic and for mixed complex/scalar arithmetic. Scalar arguments are treated as complex numbers with the real part equal to the argument and the imaginary part set to zero.

1,5) Adds other to *this.
2,6) Subtracts other from *this.
3,7) Multiplies *this by other.
4,8) Divides *this by other.

[edit] Parameters

other - a complex or scalar value of matching type (float, double, long double)

[edit] Return value

*this

[edit] See also

applies unary operators to complex numbers
(function template) [edit]
performs complex number arithmetics on two complex values or a complex and a scalar
(function template) [edit]