std::complex<T>::operator+(unary), operator-(unary) - cppreference.com
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template< class T > std::complex<T> operator+( const std::complex<T>& val ); |
(1) | (C++20 前) |
template< class T > constexpr std::complex<T> operator+( const std::complex<T>& val ); |
(C++20 起) | |
template< class T > std::complex<T> operator-( const std::complex<T>& val ); |
(2) | (C++20 前) |
template< class T > constexpr std::complex<T> operator-( const std::complex<T>& val ); |
(C++20 起) | |
为复数实现一元算术运算符的类似物。
1) 返回其实参的值
2) 求实参的相反数
参数
返回值
1) 实参的副本，std::complex<T>(val)
2) 实参的相反数，std::complex<T>(-val.real(), -val.imag())