std::complex<T>::operator+(unary), operator-(unary) - cppreference.com

std::complex<T>::operator+(unary), operator-(unary)

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C++
 
数值库
 
std::complex
 
(1) 
template< class T >
std::complex<T> operator+( const std::complex<T>& val );
(C++20 前) 
template< class T >
constexpr std::complex<T> operator+( const std::complex<T>& val );
(C++20 起)
(2) 
template< class T >
std::complex<T> operator-( const std::complex<T>& val );
(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

val - 复数实参

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())

参阅