std::sqrt<div class="t-tr-text">（STD ::复杂）<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::complex)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

 

C++

语言

概念

实用工具库

字符串库

集装箱库

算法库

迭代器库

Numerics库

输入/输出库

本地化库

正则表达式库 （C++11）

原子操作库 （C++11）

线程的支持库 （C++11）

 

Numerics的图书馆

常见的数学函数

浮点环境

复数

数字阵列

伪随机数生成

编译时合理的算法 （C++11）

通用的数值运算 Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iota （C++11）

accumulate

inner_product

adjacent_difference

partial_sum

 

复数

成员函数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
complex::complex
complex::operator=
complex::real
complex::imag
complex::operator+= complex::operator-= complex::operator*= complex::operator/=
非成员函数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
operator== operator!=
operator<< operator>>
real
imag
abs
arg
norm
conj
proj （C++11）
polar
指数函数 Original: Exponential functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
exp
log
log10
电源的功能 Original: Power functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
pow
sqrt
三角函数 Original: Trigonometric functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sin cos tan	asin （C++11） acos （C++11） atan （C++11）
双曲函数 Original: Hyperbolic functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sinh cosh tanh	asinh （C++11） acosh （C++11） atanh （C++11）

 

Defined in header <complex>
template< class T > complex<T> sqrt( const complex<T>& x );

计算复数x的平方根.

Original:

Computes the square root of the complex number x.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

沿负实轴的割线。 sqrt计算平方根的右半平面的范围内。 x是一个负实数，则返回值将落在正虚轴.

Original:

The branch cuts are along the negative real axis. sqrt computes the square root in the range of the right half-plane. If x is a negative real number, the return value will lie on the positive imaginary axis.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

参数

x

-

复杂的编号，以采取的平方根 Original: complex number to take the square root of The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

的平方根x.

Original:

the square root of x.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

另请参阅

pow(std::complex)	复杂的电源，一个或这两个参数可以是复数 Original: complex power, one or both arguments may be a complex number The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）