可内接于矩形的最大可能菱形的面积

给定一个长为l 、宽为b的矩形，任务是找到可以内接在矩形中的最大菱形。
例子：

Input : l = 5, b = 4
Output : 10

Input : l = 16, b = 6
Output : 48

从图中我们可以看出，矩形内可内接的最大菱形的对角线等于矩形的长和宽。
所以，菱形的面积， A = (l*b)/2
下面是上述方法的实现：

C++

// C++ Program to find the biggest rhombus
// which can be inscribed within the rectangle
#include 
using namespace std;
 
// Function to find the area
// of the biggest rhombus
float rhombusarea(float l, float b)
{
    // the length and breadth cannot be negative
    if (l < 0 || b < 0)
        return -1;
 
    // area of the rhombus
    return (l * b) / 2;
}
 
// Driver code
int main()
{
    float l = 16, b = 6;
    cout << rhombusarea(l, b) << endl;
    return 0;
}

Java

// Java Program to find the
// biggest rhombus which can be
// inscribed within the rectangle
import java.io.*;
 
class GFG
{
 
// Function to find the area
// of the biggest rhombus
static float rhombusarea(float l,
                         float b)
{
    // the length and breadth
    // cannot be negative
    if (l < 0 || b < 0)
        return -1;
 
    // area of the rhombus
    return (l * b) / 2;
}
 
// Driver code
public static void main (String[] args)
{
    float l = 16, b = 6;
    System.out.println(rhombusarea(l, b));
}
}
 
// This code is contributed
// by inder_verma

Python3

# Python 3 Program to find the biggest rhombus
# which can be inscribed within the rectangle
 
 
# Function to find the area
# of the biggest rhombus
def rhombusarea(l,b):
    # the length and breadth cannot be negative
    if (l < 0 or b < 0):
        return -1
 
    # area of the rhombus
    return (l * b) / 2
 
# Driver code
if __name__ == '__main__':
    l = 16
    b = 6
    print(rhombusarea(l, b))

C#

// C# Program to find the
// biggest rhombus which can be
// inscribed within the rectangle
using System;
 
class GFG
{
 
// Function to find the area
// of the biggest rhombus
static float rhombusarea(float l,
                        float b)
{
    // the length and breadth
    // cannot be negative
    if (l < 0 || b < 0)
        return -1;
 
    // area of the rhombus
    return (l * b) / 2;
}
 
// Driver code
public static void Main ()
{
    float l = 16, b = 6;
    Console.WriteLine(rhombusarea(l, b));
}
}
 
// This code is contributed
// by shs

---

Javascript

 
// javascript Program to find the
// biggest rhombus which can be
// inscribed within the rectangle
 
// Function to find the area
// of the biggest rhombus
function rhombusarea(l,b)
{
    // the length and breadth
    // cannot be negative
    if (l < 0 || b < 0)
        return -1;
 
    // area of the rhombus
    return (l * b) / 2;
}
 
// Driver code
var l = 16, b = 6;
document.write(rhombusarea(l, b));
 
// This code contributed by Princi Singh
 

输出：

48