Sum of middle row and column in Matrix

Given a integer matrix of odd dimensions (3 * 3, 5 * 5). then the task is to find the sum of the middle row & column elements.

Examples:

Input :  2 5 7
         3 7 2
         5 6 9
Output : Sum of middle row = 12
         Sum of middle column = 18

Input :  1 3 5 6 7
         3 5 3 2 1
         1 2 3 4 5
         7 9 2 1 6
         9 1 5 3 2
Output : Sum of middle row = 15
         Sum of middle column = 18

CPP

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// C++ program to find sum of 
// middle row and column in matrix
#include <iostream>
using namespace std;
const int MAX = 100;
  
void middlesum(int mat[][MAX], int n)
{
  
    int  row_sum = 0, col_sum = 0;
      
    //loop for sum of row
    for (int i = 0; i < n; i++)
        row_sum += mat[n / 2][i];
      
    cout << "Sum of middle row = "
                    << row_sum<<endl;
      
    //loop for sum of column
    for (int i = 0; i < n; i++)
        col_sum += mat[i][n / 2];
      
    cout << "Sum of middle column = "
                            << col_sum;
}
  
// Driver function
int main()
{
    int mat[][MAX] = {{2, 5, 7},
                     {3, 7, 2}, 
                     {5, 6, 9}};
      
    middlesum(mat, 3);
     
    return 0;
}

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Java

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// java  program to find sum of 
// middle row and column in matrix
  
import java.io.*;
  
class GFG {
      
  
static  int MAX = 100;
  
 static void middlesum(int mat[][], int n)
{
  
    int row_sum = 0, col_sum = 0;
      
    // loop for sum of row
    for (int i = 0; i < n; i++)
        row_sum += mat[n / 2][i];
      
    System.out.println ( "Sum of middle row = "
                  + row_sum);
      
    // loop for sum of column
    for (int i = 0; i < n; i++)
        col_sum += mat[i][n / 2];
      
    System.out.println ( "Sum of middle column = "
                 + col_sum);
}
  
// Driver function
    public static void main (String[] args) {
        int mat[][] = {{2, 5, 7},
                    {3, 7, 2}, 
                    {5, 6, 9}};
      
        middlesum(mat, 3);
      
    }
}
  
// This code is contributed by vt_m.

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Python3

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# Python program to find sum of 
# middle row and column in matrix
  
   
def middlesum(mat,n):
   
    row_sum = 0
    col_sum = 0
       
    # loop for sum of row
    for i in range(n):
        row_sum += mat[n // 2][i]
       
    print("Sum of middle row = ",
                     row_sum)
       
    # loop for sum of column
    for i in range(n):
        col_sum += mat[i][n // 2]
       
    print("Sum of middle column = ",
                            col_sum)
  
# Driver code
mat= [[2, 5, 7],
     [3, 7, 2], 
     [5, 6, 9]]
       
middlesum(mat, 3)
  
# This code is contributed
# by Anant Agarwal.

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C#

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// C# program to find sum of 
// middle row and column in matrix
using System;
  
class GFG {
      
  
    //static int MAX = 100;
      
    static void middlesum(int [,]mat, int n)
    {
      
        int row_sum = 0, col_sum = 0;
          
        // loop for sum of row
        for (int i = 0; i < n; i++)
            row_sum += mat[n / 2, i];
          
        Console.WriteLine ( "Sum of middle row = "
                    + row_sum);
          
        // loop for sum of column
        for (int i = 0; i < n; i++)
            col_sum += mat[i, n / 2];
          
        Console.WriteLine ( "Sum of middle column = "
                            + col_sum);
    }
  
    // Driver function
    public static void Main () {
        int [,]mat = {{2, 5, 7},
                    {3, 7, 2}, 
                    {5, 6, 9}};
      
        middlesum(mat, 3);
      
    }
}
  
// This code is contributed by vt_m.

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PHP

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<?php
// PHP program to find sum of 
// middle row and column in matrix
  
function middlesum( $mat$n)
{
  
     $row_sum = 0; $col_sum = 0;
      
    //loop for sum of row
    for ( $i = 0; $i < $n; $i++)
        $row_sum += $mat[$n / 2][$i];
      
    echo "Sum of middle row = "
                    , $row_sum,"\n";
      
    //loop for sum of column
    for ( $i = 0; $i < $n; $i++)
        $col_sum += $mat[$i][$n / 2];
      
    echo "Sum of middle column = "
                            , $col_sum;
}
  
// Driver function
  
     $mat = array(array(2, 5, 7),
                 array(3, 7, 2), 
                array(5, 6, 9));
      
    middlesum($mat, 3);
      
// This code is contributed by anuj_67.
?>

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Output:



Sum of middle row = 12
Sum of middle column = 18

Time Complexity: O(n)



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Improved By : vt_m