package array_demo;

/**

* @author Md. Talal Wasim

* https://github.com/mdtalalwasim

*/

import java.util.Scanner;

public class MatrixMultiplication {

public static void main(String[] args) {

System.out.println("Please Enter ROW number of a Matrix: ");

Scanner input = new Scanner(System.in);

int m,n,m1,n1;

m = input.nextInt();

System.out.println("Please Enter COLUMN number of a Matrix: ");

n = input.nextInt();

int[][] matrixA = new int[m][n];//m=row, n=col

//int[][] matrixC = new int[][];

//getting input for Matrix A:

System.out.println("Enter Elements for Matrix A:");

for (int row = 0; row < m; row++) {// m = user inputed row num, n=col number by user.

for (int col = 0; col < n; col++) { //

System.out.printf("A[%d][%d]= ",row,col);

matrixA[row][col] = input.nextInt();

}

System.out.println();

}

System.out.println("Please Enter ROW number of a Matrix B: ");

m1 = input.nextInt();

System.out.println("Please Enter COLUMN number of a Matrix B: ");

n1 = input.nextInt();

int[][] matrixB = new int[m1][n1];//m=row, n=col

//getting input for Matrix B:

System.out.println("Enter Elements for Matrix B:");

for (int row = 0; row < m1; row++) {// m = user inputed row num, n=col number by user.

for (int col = 0; col < n1; col++) { //

System.out.printf("B[%d][%d]= ",row,col);

matrixB[row][col] = input.nextInt();

}

System.out.println();

}

//Print elements for Matrix A:

System.out.println("Matrix A= ");

for (int row = 0; row < m; row++) {// m = user inputed row num, n=col number by user.

for (int col = 0; col < n; col++) { //

System.out.print("\t"+matrixA[row][col]);

}

System.out.println();

}

//Print elements for Matrix B:

System.out.println("Matrix B= ");

for (int row = 0; row < m1; row++) {// m = user inputed row num, n=col number by user.

for (int col = 0; col < n1; col++) { //

System.out.print("\t"+matrixB[row][col]);

}

System.out.println();

}

//A x B:

int matrixC[][] = new int[m][n];

System.out.println("A x B = ");

for (int row = 0; row < m; row++) {// m = user inputed row num, n=col number by user.

for (int col = 0; col < n; col++) { //

matrixC[row][col] = 0;

//System.out.print("\t"+(matrixA[row][col] * matrixB[row][col]));

matrixC[row][col] = matrixC[row][col] + (matrixA[row][col] * matrixB[row][col]);

System.out.print("\t"+matrixC[row][col]);

}

System.out.println();

}

}

}