c+pow函数的头文件

C ++ pow()函数 (C++ pow() function)

pow() function is a library function of cmath header (<math.h> in earlier versions), it is used to find the raise to the power, it accepts two arguments and returns the first argument to the power of the second argument.

pow()函数是cmath标头的库函数(在早期版本中为<math.h>)，用于查找幂的加数，它接受两个参数并将第一个参数返回为第二个参数的幂。

Syntax of pow() function:

pow()函数的语法：

    pow(x, y);

Parameter(s): x, y – are the numbers to calculate x^y.

参数： x，y –是用于计算x ^ y的数字。

Return value: double – it returns double value that is calculate result of x to the power of y.

返回值： double-返回double值，它是x的计算结果乘以 y的幂。

Example:

例：

    Input:
    float x = 2;
    float y = 3;

    Function call:
    pow(x,y);

    Output:
    8

C ++代码演示pow()函数的示例 (C++ code to demonstrate the example of pow() function)

// C++ code to demonstrate the example of 
// pow() function

#include <iostream>
#include <cmath>
using namespace std;

// main code section
int main()
{
    float x;
    float y;
    
    //input the values
    cout<<"Enter the value of x: ";
    cin>>x;
    cout<<"Enter the value of y: ";
    cin>>y;
    
    // calculate the power
    float result = pow(x,y);
    cout<<x<<" to the power of "<<y<<" is = "<<result;
    cout<<endl;
    
    return 0;
}

Output

输出量

First run:
Enter the value of x: 10 
Enter the value of y: 5
10 to the power of 5 is = 100000

Second run:
Enter the value of x: 10.23
Enter the value of y: 1.5
10.23 to the power of 1.5 is = 32.72

Third run:
Enter the value of x: 10 
Enter the value of y: 0
10 to the power of 0 is = 1 

Fourth run:
Enter the value of x: 0
Enter the value of y: 1.5
0 to the power of 1.5 is = 0

翻译自: https://www.includehelp.com/cpp-tutorial/pow-function-with-example.aspx

c+pow函数的头文件