Sum Of Border Elements
Write a program to display the sum of border elements in a m x n matrix.
import java.io.*;
class SumOfBorderElements
{
public static void main(String ar[])throws Exception
{
BufferedReader ob=new BufferedReader(
new InputStreamReader(System.in));
int i,j,sobe=0,m,n;
System.out.println("Enter the no of rows and columns of the matrix : ");
m=Integer.parseInt(ob.readLine());
n=Integer.parseInt(ob.readLine());
int a[][]=new int[m][n];
System.out.println("\nEnter "+(m*n)+" elements : ");
for(i=0;i< m;i++)
{
for(j=0;j< n;j++)
{
a[i][j]=Integer.parseInt(ob.readLine());
}
}
for(i=0;i< m;i++)
{
for(j=0;j< n;j++)
{
if(i==0 || j==0 || i==m-1 || j==n-1)
sobe+=a[i][j];
}
}
System.out.println("\nSum of border elements : "+ sobe);
}
}
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