c+pow函數的頭文件

C ++ pow()函數 (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()函數是cmath標頭的庫函數(在早期版本中為<math.h>)，用于查找冪的加數，它接受兩個參數并將第一個參數返回為第二個參數的冪。

Syntax of pow() function:

pow()函數的語法：

pow(x, y);

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

參數： x，y –是用于計算x ^ y的數字。

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的計算結果乘以 y的冪。

Example:

例：

Input:float x = 2;float y = 3;Function call:pow(x,y);Output:8

C ++代碼演示pow()函數的示例 (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 valuescout<<"Enter the value of x: ";cin>>x;cout<<"Enter the value of y: ";cin>>y;// calculate the powerfloat result = pow(x,y);cout<<x<<" to the power of "<<y<<" is = "<<result;cout<<endl;return 0; }

Output

輸出量

First run: Enter the value of x: 10 Enter the value of y: 5 10 to the power of 5 is = 100000Second run: Enter the value of x: 10.23 Enter the value of y: 1.5 10.23 to the power of 1.5 is = 32.72Third 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

翻譯自: https://www.includehelp.com/cpp-tutorial/pow-function-with-example.aspx

c+pow函數的頭文件

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