How to express the root form in c++

There is no symbol directly representing the root sign in C. You can use the following methods to implement it: use the pow() function and set the exponent to 0.5; use the sqrt() function and include the <cmath> header file; use approximate values , such as Newton iteration method and binary search; use external libraries, such as Boost library.

C represents the root number

There is no symbol directly representing the root number in C. However, there are several ways to implement similar mathematical operations:

1. Using the pow() function

pow() The function can calculate Any power of a number. To calculate the radical, just set the exponent to 0.5:

double x = 16.0;
double square_root = pow(x, 0.5); // 计算 x 的平方根

2. Use the sqrt() function

C There is no built-in sqrt in the standard library () function. However, it can be accessed by including the <cmath> header file:

#include <cmath>

double x = 16.0;
double square_root = sqrt(x); // 计算 x 的平方根

3. Using approximations

For some values, it is possible Use approximation to calculate the root:

• Newton iteration method: This is an iterative algorithm that can continuously approach the root.
• Binary search: This is an algorithm that finds the root through repeated guessing.

4. Using external libraries

There are many external libraries that provide the sqrt() function or other methods for calculating the root. The most common one is Boost Library:

#include <boost/math/special_functions/math_special_functions.hpp>

double x = 16.0;
double square_root = boost::math::sqrt(x); // 计算 x 的平方根

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