求出排成一行的圆的半径，给出第一个圆和最后一个圆的圆心之间的距离
原文:https://www . geeksforgeeks . org/find-给定第一个和最后一个圆的圆心的半径和距离/
这里给出的是外部互相接触的 n 个圆，排成一排。给出了第一个圆和最后一个圆的圆心之间的距离。这些圆的半径相等。任务是找到每个圆的半径。 例:
Input: d = 42, n = 4
Output: The radius of each circle is 7
Input: d = 64, n = 5
Output: The radius of each circle is 8
接近 :
假设有 n 个圆，每个圆的长度半径为 r 。
让，第一个和最后一个圆之间的距离= d
从图中可以明显看出，
r+r+(n-2)* 2r = d
2r+2nr–4r = d
2nr–2r = d
所以，r = d/(2n-2)
C++
// C++ program to find radii of the circles
// which are lined in a row
// and distance between the
// centers of first and last circle is given
#include <bits/stdc++.h>
using namespace std;
void radius(int n, int d)
{
cout << "The radius of each circle is "
<< d / (2 * n - 2) << endl;
}
// Driver code
int main()
{
int d = 42, n = 4;
radius(n, d);
return 0;
}
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to find radii of the circles
// which are lined in a row
// and distance between the
// centers of first and last circle is given
import java.io.*;
class GFG
{
static void radius(int n, int d)
{
System.out.print( "The radius of each circle is "
+d / (2 * n - 2));
}
// Driver code
static public void main (String []args)
{
int d = 42, n = 4;
radius(n, d);
}
}
// This code is contributed by anuj_67..
Python 3
# Python program to find radii of the circles
# which are lined in a row
# and distance between the
# centers of first and last circle is given
def radius(n, d):
print("The radius of each circle is ",
d / (2 * n - 2));
d = 42; n = 4;
radius(n, d);
# This code is contributed by PrinciRaj1992
C
// C# program to find radii of the circles
// which are lined in a row
// and distance between the
// centers of first and last circle is given
using System;
class GFG
{
static void radius(int n, int d)
{
Console.Write( "The radius of each circle is "
+d / (2 * n - 2));
}
// Driver code
static public void Main ()
{
int d = 42, n = 4;
radius(n, d);
}
}
// This code is contributed by anuj_67..
java 描述语言
<script>
// javascript program to find radii of the circles
// which are lined in a row
// and distance between the
// centers of first and last circle is given
function radius(n , d)
{
document.write( "The radius of each circle is "
+d / (2 * n - 2));
}
// Driver code
var d = 42, n = 4;
radius(n, d);
// This code is contributed by 29AjayKumar
</script>
Output:
The radius of each circle is 7
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