Question

Any "Java-ians" here?
[Challenge]
Difficulty Level: Medium

WAP in Java to perform matric addition
Ex:-
$\blue{ \tt{Enter \: matric \: 1}}$
1
3
-2
0
$\blue{ \tt{Enter \: matric \: 2}}$
2
4
5
1
$\blue{ \texttt{Your Entered matric is as follows} }$
$\blue{ \tt{Matric 1}}$
$\begin{gathered} \blue{\begin{gathered}\begin{array}{cc}\tt1&\tt3\\ \tt - 2&\tt0\end{array}\end{gathered} }\end{gathered} \\ \blue{\tt{Matric \: 2}} \\ \begin{gathered} \blue{\begin{gathered}\begin{array}{cc}\tt2&\tt4\\ \tt 5&\tt1\end{array}\end{gathered} }\end{gathered}$
$\blue{ \tt{Sum\: of \: both \: the \: matric:-}} \\ \begin{gathered}\blue{\begin{gathered}\begin{array}{cc}\tt3&\tt7\\ \tt 3&\tt1\end{array}\end{gathered} }\end{gathered}$
[Ignore Spaces in latex cod.e]

Hint: Simply add same index elements of both the matric.​

Answer 1

Solution:

The given program is written in Java.

import java.util.*;

public class MatrixAddition{

   public static void main(String args[]){

       Scanner sc=new Scanner(System.in);

       int rows,cols,i,j;

       System.out.print("Enter the number of rows: ");

       rows=sc.nextInt();

       System.out.print("Enter the number of columns: ");

       cols=sc.nextInt();

       int a[][]=new int[rows][cols];

       int b[][]=new int[rows][cols];

       int c[][]=new int[rows][cols];

       System.out.println("Enter elements in first matrix...");

       for(i=0;i<rows;i++){

           for(j=0;j<cols;j++){

               System.out.printf("a[%d][%d] >> ",i,j);

               a[i][j]=c[i][j]=sc.nextInt();

           }

       }

       System.out.println("\nEnter the elements in second matrix...");

       for(i=0;i<rows;i++){

           for(j=0;j<cols;j++){

               System.out.printf("a[%d][%d] >> ",i,j);

               b[i][j]=sc.nextInt();

               c[i][j]+=b[i][j];

           }

       }

       System.out.println("\n\nMatrix a[][]:");

       displayMatrix(a);

       System.out.println("\nMatrix b[][]:");

       displayMatrix(b);

       System.out.println("\nTheir sum in Third Matrix:");

       displayMatrix(c);

   }

   

   static void displayMatrix(int a[][]){

       for(int x[]:a){

           for(int y:x)

               System.out.print(y+" ");

           System.out.println();

       }

   }

}

Logic:

• Logic is very simple, just add the elements of both the matrix.

See the attachment for output.

Answer 2

Answer:

Program:-

import java.util.*;

public class Main

{

public static void main(String args[])

{

Scanner in=new Scanner(System.in);

int a[][]=new int[2][2];

int b[][]=new int[2][2];

int c[][]=new int[2][2];

System.out.println("Enter the elements of 1st matrix");

for(int i=0;i<2;i++)

{

for(int j=0;j<2;j++)

{

a[i][j]=in.nextInt();

}

}

System.out.println("The first matrix:");

for(int i=0;i<2;i++)

{

for(int j=0;j<2;j++)

{

System.out.print(a[i][j]+" ");

}

System.out.println();

}

System.out.println("Enter the elements ot 2nd matrix");

for(int i=0;i<2;i++)

{

for(int j=0;j<2;j++)

{

b[i][j]=in.nextInt();

}

}

System.out.println("The second matrix:");

for(int i=0;i<2;i++)

{

for(int j=0;j<2;j++)

{

System.out.print(b[i][j]+" ");

}

System.out.println();

}

System.out.println("New matrix:");

for(int i=0;i<2;i++)

{

for(int j=0;j<2;j++)

{

c[i][j]=a[i][j]+b[i][j];

System.out.print(c[i][j]+" ");

}

System.out.println();

}

in.close();

}

}

Output is attched.