Program for Matrix Multiplication

This program can be used to do matrix multiplication in java. Click on Read More...

Code

import java.util.Scanner;

/**
 * 
 * @author Devansh Dhrafani
 * 
 */
public class MatrixMultiplication {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner myScanner=new Scanner(System.in);
        int a[][]=new int[100][100];
        int b[][]=new int[100][100];
        int c[][]=new int[100][100];
        System.out.println("Multiplication of 2 Matrices");
        System.out.println("Enter the number of Rows and Columns of Matrix-A (max. 100)");
        System.out.print("Rows = ");
        int m=myScanner.nextInt();
        System.out.print("Columns = ");
        int n=myScanner.nextInt();
        System.out.println("Enter the number of Rows and Columns of Matrix-B (max. 100)");
        System.out.print("Rows = ");
        int p=myScanner.nextInt();
        System.out.print("Columns = ");
        int q=myScanner.nextInt();
        if (n==p) {
            System.out.println("Matrices can be multiplied.. !!");
            System.out.println("Input Matrix-A");
            for (int i=0;i<m;i++) {
                for (int j=0;j<n;j++) {
                    a[i][j]=myScanner.nextInt();
                }
            }
            System.out.println("Input Matrix-B");
            for (int i=0;i<p;i++) {
                for (int j=0;j<q;j++) {
                    b[i][j]=myScanner.nextInt();
                }
            }
            System.out.println("Matrix-A :");
            for (int i=0;i<m;i++) {
                System.out.println();
                for (int j=0;j<n;j++) {
                    System.out.print(a[i][j] + "\t");
                }
            }
            System.out.println();
            System.out.println("Matrix-B :");
            for (int i=0;i<p;i++) {
                System.out.println();
                for (int j=0;j<q;j++) {
                    System.out.print(b[i][j] + "\t");
                }
            }
            for (int i=0;i<m;i++)
                for (int j=0;j<q;j++) {
                    c[i][j]=0;
                    for (int k=0;k<n;k++)
                        c[i][j]+=a[i][k]*b[k][j];
                }
            System.out.println();
            System.out.println("The product of 2 Matrices is :");
            for (int i=0;i<p;i++) {
                System.out.println();
                for (int j=0;j<q;j++) {
                    System.out.print(c[i][j] + "\t");
                }
            }
            System.out.println();
        } 
        else {
            System.out.println("Whoa.. !!");
            System.out.println("Matrices are Incompatible for Multiplication.");
        }
    }
}

Output

Link for Download

http://goo.gl/6tLXMW