First Epc assignment

Ryan/src/AddMatrices.java

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+/**
+ * Created by tenas on 8/3/17.
+ */
+import  java.util.Scanner;
+
+public class AddMatrices {
+	public static void main(String args[])
+	{
+		int m, n, c, d;
+		Scanner in = new Scanner(System.in);
+
+		System.out.println("Enter the number of rows and columns of matrix");
+		m = in.nextInt();
+		n  = in.nextInt();
+
+		int first[][] = new int[m][n];
+		int second[][] = new int[m][n];
+		int sum[][] = new int[m][n];
+
+		System.out.println("Enter the 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 elements of second matrix");
+
+		for ( c = 0 ; c < m ; c++ )
+			for ( d = 0 ; d < n ; d++ )
+				second[c][d] = in.nextInt();
+
+		for ( c = 0 ; c < m ; c++ )
+			for ( d = 0 ; d < n ; d++ )
+				sum[c][d] = first[c][d] + second[c][d];  //replace '+' with '-' to subtract matrices
+
+		System.out.println("Sum of entered matrices:-");
+
+		for ( c = 0 ; c < m ; c++ )
+		{
+			for ( d = 0 ; d < n ; d++ )
+				System.out.print(sum[c][d]+"\t");
+
+			System.out.println();
+		}
+	}
+}
+
+

Ryan/src/Arrayz.java

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+import java.util.ArrayList;
+import java.util.Random;
+
+/*
+ Created by tenas on 8/3/17.
+	 */
+public class Arrayz {
+
+		private int[] a;
+
+		public Arrayz(int[] a) {
+			this.a = a;
+		}
+
+		public int[] getA() {
+			return a;
+		}
+
+		public void reverseArray(int[] b) {
+			int temporal;
+			for(int i=0; i<b.length; i++){
+				System.out.println(b[b.length-1-i]);
+			}
+		}
+
+		public void minAndMax(int[] d) {
+			int max = d[0];
+			int min = d[0];
+
+			for(int a: d){
+				if(a>max) {
+					max = a;
+				}
+			}
+			for(int a: d){
+				if(a<min) {
+					min = a;
+				}
+			}
+			System.out.println("The Maximum is: " + max + " and the minimum is: " + min);
+		}
+
+		public void commonElements(int[] a, int[] b){
+			ArrayList<Integer> commonElements = new ArrayList<>();
+			int counter = 0;
+			for(int i=0; i<a.length; i++){
+				for(int k=0; k<b.length; k++){
+					if(a[i]==b[k])
+						commonElements.add(a[i]);
+				}
+			}
+			System.out.println("Common elements are: ");
+			for(int c: commonElements) {
+				System.out.println( c + "  ");
+			}
+		}
+
+		public void removeDuplicates(int[] a){
+			Random change = new Random();
+			for(int i=0; i<a.length; i++){
+				for(int k=i+1; k<a.length; k++) {
+					if (a[i] == a[k]) {
+						a[k] = 1 + change.nextInt(100);//changing one of the duplicates to any random value from 1-100
+						//hopefully this wouldnt cause another duplicate. Cannot remove the value completly from the array since arrays are not dynamic.
+					}
+				}
+			}
+			for(int c: a) {
+				System.out.println( c + "  ");
+			}
+		}
+
+	}
+
+
+

Ryan/src/ArrayzTest.java

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+import java.util.Scanner;
+
+/**
+ * Created by tenas on 8/3/17.
+ */
+public class ArrayzTest {
+	public static void main(String args[]){
+		Scanner input = new Scanner(System.in);
+		System.out.println("Enter length of array");
+		int length = input.nextInt();
+		System.out.println("Enter elements of array");
+		int[] x = new int[length];
+		for (int i = 0; i < x.length; i++){
+			x[i] = input.nextInt();
+		}
+
+		Arrayz array = new Arrayz(x);
+		//array.reverseArray(x);
+		//array.minAndMax(x);
+		//array.commonElements(x,y); to use this, create another array y
+		array.removeDuplicates(x);
+	}
+}
+
+
+

Ryan/src/ReplaceLetter.java

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+import java.util.Scanner;
+
+/**
+ * Created by tenas on 8/3/17.
+ */
+public class ReplaceLetter {
+
+	public static void main(String[] args) {
+		Scanner input = new Scanner(System.in);
+		System.out.println("Enter a word");
+		String name = input.nextLine();
+		char[] a = new char[name.length()];
+		for (int i = 0; i < a.length; i++)
+			a[i] = name.charAt(i);
+		System.out.println("Enter a position of therletter in the word which you want to change");
+		int n = input.nextInt();
+		a[n-1] ='*';
+		System.out.print("Modified word becomes ");
+		for(char c: a){
+
+			System.out.print(c + " ");
+		}
+	}
+}