operator+,-,*,/ (std::complex)
| (1) | |
template< class T >
std::complex<T> operator+( const std::complex<T>& lhs, const std::complex<T>& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator+( const std::complex<T>& lhs, const std::complex<T>& rhs );
| (since C++20) |
| (2) | |
template< class T >
std::complex<T> operator+( const std::complex<T>& lhs, const T& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator+( const std::complex<T>& lhs, const T& rhs );
| (since C++20) |
| (3) | |
template< class T >
std::complex<T> operator+( const T& lhs, const std::complex<T>& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator+( const T& lhs, const std::complex<T>& rhs );
| (since C++20) |
| (4) | |
template< class T >
std::complex<T> operator-( const std::complex<T>& lhs, const std::complex<T>& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator-( const std::complex<T>& lhs, const std::complex<T>& rhs );
| (since C++20) |
| (5) | |
template< class T >
std::complex<T> operator-( const std::complex<T>& lhs, const T& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator-( const std::complex<T>& lhs, const T& rhs );
| (since C++20) |
| (6) | |
template< class T >
std::complex<T> operator-( const T& lhs, const std::complex<T>& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator-( const T& lhs, const std::complex<T>& rhs );
| (since C++20) |
| (7) | |
template< class T >
std::complex<T> operator*( const std::complex<T>& lhs, const std::complex<T>& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator*( const std::complex<T>& lhs, const std::complex<T>& rhs );
| (since C++20) |
| (8) | |
template< class T >
std::complex<T> operator*( const std::complex<T>& lhs, const T& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator*( const std::complex<T>& lhs, const T& rhs );
| (since C++20) |
| (9) | |
template< class T >
std::complex<T> operator*( const T& lhs, const std::complex<T>& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator*( const T& lhs, const std::complex<T>& rhs );
| (since C++20) |
| (10) | |
template< class T >
std::complex<T> operator/( const std::complex<T>& lhs, const std::complex<T>& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator/( const std::complex<T>& lhs, const std::complex<T>& rhs );
| (since C++20) |
| (11) | |
template< class T >
std::complex<T> operator/( const std::complex<T>& lhs, const T& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator/( const std::complex<T>& lhs, const T& rhs );
| (since C++20) |
| (12) | |
template< class T >
std::complex<T> operator/( const T& lhs, const std::complex<T>& rhs );
| (until C++20) |
template< class T >
constexpr std::complex<T> operator/( const T& lhs, const std::complex<T>& rhs );
| (since C++20) |
Implements the binary 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.
1-3) Returns the sum of its arguments
4-6) Returns the result of subtracting rhs
from lhs
7-9) Multiplies its arguments
10-12) Divides lhs
by rhs
Parameters
lhs, rhs | - | the arguments: either both complex numbers or one complex and one scalar of matching type (float , double , long double ) |
Return value
Notes
Because template argument deduction does not consider implicit conversions, these operators cannot be used for mixed integer/complex arithmetic. In all cases, the scalar must have the same type as the underlying type of the complex number.
The GCC flag "-fcx-limited-range" (included by "-ffast-math") changes the behavior of complex multiply/division by removing checks for floating point edge cases. This impacts loop vectorization.
Example
#include <iostream>
#include <complex>
int main()
{
std::complex<double> c2(2, 0);
std::complex<double> ci(0, 1);
std::cout << ci << " + " << c2 << " = " << ci+c2 << '\n'
<< ci << " * " << ci << " = " << ci*ci << '\n'
<< ci << " + " << c2 << " / " << ci << " = " << ci+c2/ci << '\n'
<< 1 << " / " << ci << " = " << 1./ci << '\n';
// std::cout << 1.f/ci; // compile error
// std::cout << 1/ci; // compile error
}
Output:
(0,1) + (2,0) = (2,1)
(0,1) * (0,1) = (-1,0)
(0,1) + (2,0) / (0,1) = (0,-1)
1 / (0,1) = (0,-1)
See also
| compound assignment of two complex numbers or a complex and a scalar (public member function) |
| applies unary operators to complex numbers (function template) |