使用直径的端点找到圆心

给定圆的两个端点(x1，y1)和(x2，y2)的直径，找出圆的中心。
例子 ：

Input  : x1 = -9, y1 = 3, and 
         x2 = 5, y2 = –7
Output : -2, –2

Input  :  x1 = 5, y1 = 3 and 
          x2 = –10 y2 = 4
Output : –2.5, 3.5

中点公式：
(x1，y2)和(x2，y2)这两个点的中点是： M =((x ₁ + x ₂ )/ 2，(y ₁ + y ₂ )/ 2)
圆的中心是其直径的中点，因此我们使用中点公式来计算其直径的中点。

C++

// C++ program to find the
// center of the circle
#include 
using namespace std;
 
// function to find the
// center of the circle
void center(int x1, int x2,
            int y1, int y2)
{
     
    cout << (float)(x1 + x2) / 2 <<
          ", " << (float)(y1 + y2) / 2;
}
 
// Driven Program
int main()
{
    int x1 = -9, y1 = 3, x2 = 5, y2 = -7;
    center(x1, x2, y1, y2);
    return 0;
}

Java

// Java program to find the
// center of the circle
class GFG {
     
    // function to find the
    // center of the circle
    static void center(int x1, int x2,
                            int y1, int y2)
    {
         
        System.out.print((float)(x1 + x2) / 2
            + ", " + (float)(y1 + y2) / 2);
    }
     
    // Driver Program to test above function
    public static void main(String arg[]) {
         
        int x1 = -9, y1 = 3, x2 = 5, y2 = -7;
        center(x1, x2, y1, y2);
    }
}
 
// This code is contributed by Anant Agarwal.

Python3

# Python3 program to find
# the center of the circle
 
# Function to find the
# center of the circle
def center(x1, x2, y1, y2) :
 
    print(int((x1 + x2) / 2), end= "")
    print(",", int((y1 + y2) / 2) )
 
# Driver Code
x1 = -9; y1 = 3; x2 = 5; y2 = -7
center(x1, x2, y1, y2)
 
# This code is contributed by Smitha Dinesh Semwal

C#

// C# program to find the
// center of the circle
using System;
 
class GFG {
     
    // function to find the
    // center of the circle
    static void center(int x1, int x2,
                            int y1, int y2)
    {
         
        Console.WriteLine((float)(x1 + x2) / 2
                + ", " + (float)(y1 + y2) / 2);
    }
     
    // Driver Program to test above function
    public static void Main() {
         
        int x1 = -9, y1 = 3, x2 = 5, y2 = -7;
        center(x1, x2, y1, y2);
    }
}
 
// This code is contributed by vt_m.

Javascript

 
// javascript program to find the
// center of the circle
 
// function to find the
    // center of the circle
    function center(x1, x2,
                     y1, y2)
    {
           
        document.write((x1 + x2) / 2
            + ", " + (y1 + y2) / 2);
    }
 
// Driver Function
 
         let x1 = -9, y1 = 3, x2 = 5, y2 = -7;
        center(x1, x2, y1, y2);
     
    // This code is contributed by susmitakundugoaldanga.

输出 ：

-2, -2