C++ hypot()用法及代碼示例

C++ hypot() 函數

hypot() 函數是 cmath 頭文件的庫函數，用於求給定數字的斜邊，它接受兩個數字並返回斜邊的計算結果，即sqrt(x*x + y*y)。

hypot() 函數的語法：

    hypot(x, y);

參數： x, y– 要計算斜邊的數字(或sqrt(x*x + y*y))

返回值： double– 它返回作為表達式結果的雙精度值sqrt(x*x + y*y)。

例：

    Input:
    float x = 10.23;
    float y = 2.3;

    Function call:
    hypot(x, y);

    Output:
    10.4854

C++代碼演示hypot()函數的例子

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

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

// main code section
int main()
{
    float x = 10.23;
    float y = 2.3;

    // calculate the hypotenuse 
    float result = hypot(x, y);
    cout<<"hypotenuse of "<<x<<" and "<<y<<" is = "<<result;
    cout<<endl;
    
    //using sqrt() function
    result = sqrt((x*x + y*y));
    cout<<"hypotenuse of "<<x<<" and "<<y<<" is = "<<result;
    cout<<endl;
    
    return 0;
}

輸出

hypotenuse of 10.23 and 2.3 is = 10.4854
hypotenuse of 10.23 and 2.3 is = 10.4854