Merge pull request #342 from shreeyachatzz/patch-7

Create MatrixMultiply.java

Program's_Contributed_By_Contributors/Java_Programs/MatrixMultiply.java

@@ -0,0 +1,127 @@
+//coded by shreeyachatzz
+import java.util.Scanner;//For importing Scanner Class
+class MatrixMultiplication
+{
+   public static void main(String args[])
+   {
+      int m, n, p, q, sum = 0, c, d, k;
+      //To accept the no of rows and columns from the user for bothe the matices and then to accept elements of the matrix
+      Scanner in = new Scanner(System.in);
+      System.out.println("Enter the number of rows and columns of first matrix");
+      m = in.nextInt();
+      n = in.nextInt();
+
+      int first[][] = new int[m][n];
+
+      System.out.println("Enter elements of first matrix");
+
+      for (c = 0; c < m; c++)
+      {
+         for (d = 0; d < n; d++)
+        { 
+            first[c][d] = in.nextInt();
+        }
+    }
+      System.out.println("Enter the number of rows and columns of second matrix");
+      p = in.nextInt();
+      q = in.nextInt();
+      //To multiply matrices as the elements of the next matrix are accepted by user
+      if (n != p)
+         System.out.println("The matrices can't be multiplied with each other.");
+      else
+      {
+         int second[][] = new int[p][q];
+         int multiply[][] = new int[m][q];
+
+         System.out.println("Enter elements of second matrix");
+
+         for (c = 0; c < p; c++)
+         {
+            for (d = 0; d < q; d++)
+            {
+               second[c][d] = in.nextInt();
+            }
+         }
+
+         for (c = 0; c < m; c++)
+         {
+            for (d = 0; d < q; d++)
+            {  
+               for (k = 0; k < p; k++)
+               {
+                  sum = sum + first[c][k]*second[k][d];
+               }
+
+               multiply[c][d] = sum;
+               sum = 0;
+            }
+         } 
+         System.out.println("The First Matrix: ");
+             for (c = 0; c < m; c++)
+         {
+            for (d = 0; d < n; d++)
+            {
+               System.out.print(first[c][d]+"\t");
+            }
+
+            System.out.print("\n");
+          }
+          System.out.println("The Second Matrix: ");
+          for (c = 0; c < p; c++)
+         {
+            for (d = 0; d < q; d++)
+            {
+               System.out.print(second[c][d]+"\t");
+            }
+
+            System.out.print("\n");
+         }
+         System.out.println("Product of the matrices:");
+
+         for (c = 0; c < m; c++)
+         {
+            for (d = 0; d < q; d++)
+            {
+               System.out.print(multiply[c][d]+"\t");
+            }
+
+            System.out.print("\n");
+         }
+      }
+    }
+ }
+/*
+ *INPUT
+  Enter the number of rows and columns of first matrix
+  2
+  3
+  Enter elements of first matrix
+  3
+  4
+  5
+  6
+  7
+  8
+  Enter the number of rows and columns of second matrix
+  3
+  2
+  Enter elements of second matrix
+  3
+  4
+  5
+  6
+  7
+  8
+ *OUTPUT:
+  The First Matrix: 
+  3	  4	  5	
+  6	  7	  8	
+  The Second Matrix: 
+  3	  4	
+  5	  6	
+  7	  8	
+  Product of the matrices:
+  64	  76	
+  109	  130	
+*/
+