added some algorithms to Java and C++ (#200)

arrays/README.md

@@ -1,3 +1,5 @@
+
+
 # Algorithms related to arrays
 
 ### C or C++
@@ -8,6 +10,12 @@
 4. [Shift Negatives in Array](c-or-cpp/shift-negatives.cpp)
 5. [Maximum Subarray Sum](c-or-cpp/max-subarray-sum.cpp)
 6. [Unique Elements in an Array](c-or-cpp/unique-elements-in-an-array.c)
+7. [Sorting arrays](c-or-cpp/array.cpp)
+8. [Division of no.](c-or-cpp/division.cpp)
+9. [Finding large no.](c-or-cpp/finding-large-number.cpp)
+10. [Variable declaration](c-or-cpp/variable-declaration.cpp)
+11. [Data before and after sorting](c-or-cpp/data-before-sort.cpp)
+12. [Even and odd no. ](c-or-cpp/even-and-odd.c)
 
 ### Python
 
@@ -22,3 +30,4 @@
 1. [Counting Inversions](java/count-inversions.java)
 2. [Kadane's Algorithm](java/Kadanes_Algorithm.java)
 2. [Left Rotation of Array](java/left_rotation.java)
+3. [Finding unique digits of large number](java/unique-digits-of-large-number.java)

arrays/c-or-cpp/array.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+using namespace std;
+
+int main() {
+    int numbers[5];
+
+    cout << "Enter 5 numbers: " << endl;
+
+    //  store input from user to array
+    for (int i = 0; i < 5; ++i) {
+        cin >> numbers[i];
+    }
+
+    cout << "The numbers are: ";
+
+    //  print array elements
+    for (int n = 0; n < 5; ++n) {
+        cout << numbers[n] << "  ";
+    }
+
+    return 0;
+}

arrays/c-or-cpp/data-before-sort.cpp

@@ -0,0 +1,36 @@
+#include<iostream.h>
+#include<conio.h>
+
+ void main()
+ {
+ int i,a[10],temp,j;
+ clrscr();
+ cout<<"Enter any 10 num in array: \n";
+ for(i=0;i<=10;i++)
+ {
+ cin>>a[i];
+ }
+ cout<<"\nData before sorting: ";
+ for(j=0;j<10;j++)
+ {
+ cout<<a[j];
+ }
+ for(i=0;i<=10;i++)
+ {
+ for(j=0;j<=10-i;j++)
+ {
+ if(a[j]>a[j+1])
+ {
+ temp=a[j];
+ a[j]=a[j+1];
+ a[j+1]=temp;
+ }
+ }
+ }
+ cout<<"\nData after sorting: ";
+ for(j=0;j<10;j++)
+ {
+ cout<<a[j];
+ }
+ getch();
+ }

arrays/c-or-cpp/division.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+using namespace std;
+
+int main() {
+	int divisor, dividend,quotient,remainder;
+	
+	cout << "Enter dividend:" ;
+	cin  >> dividend;
+	
+	cout << "Enter divisor:";
+	cin >> divisor;
+	
+	quotient =dividend/divisor;
+	remainder=dividend%divisor;
+	
+	cout << "Quotien =" <<quotient << endl;
+	cout << "remainder=" <<remainder ;
+	
+	
+	return 0;
+}

arrays/c-or-cpp/even-and-odd.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+int main()
+{
+ int n;
+ printf("Enter n : "); //n is number of elements in the array
+ scanf("%d", &n); 
+ int arr[n];
+ for (int i = 0; i < n; i++)
+ {
+ scanf("%d", &arr[i]);
+ }
+ int arr_odd[n], arr_even[n]; //arr_odd[] for odd elements and arr_even[] for even elements
+ int o = 0, e = 0;
+ for (int i = 0; i < n; i++)
+ {
+ if (arr[i] % 2 != 0)
+ {
+ arr_odd[o] = arr[i]; //Putting odd numbers in arr_odd[] array.
+ o++;
+ }
+ else if (arr[i] % 2 == 0)
+ {
+ arr_even[e] = arr[i]; //Putting even numbers in arr_even[] array.
+ e++;
+ }
+ }
+ 
+ printf("Even array : [ ");
+ for (int i = 0; i < e; i++)
+ {
+ printf("%d ", arr_even[i]);
+ }
+ printf("]\nOdd array : [ ");
+ for (int i = 0; i < o; i++)
+ {
+ printf("%d ", arr_odd[i]);
+ }
+ printf("]");
+ return 0;
+}

arrays/c-or-cpp/finding-large-number.cpp

@@ -0,0 +1,20 @@
+#include <stdio.h>
+
+int main() {
+	int a,b,c;
+	
+	/* Input 3 numbers from user*/
+	printf("Enter three numbers: ");
+	scanf("%d%d%d", &a ,&b ,&c); 
+	
+	if (a > b && a > c)
+	  printf("%d is the largest. ", a);
+	else if (b > a && b > c)
+	  printf("%d is the largest. ", b);
+	else if (c > a && c > b)
+	  printf("%d is the largest. ", c);
+	else
+	printf("Values are not unique");
+	
+	return 0;
+}

arrays/c-or-cpp/variable-declaration.cpp

@@ -0,0 +1,26 @@
+#include <iostream>
+using namespace std;
+
+// Variable declaration:
+extern int a,b;
+extern int c;
+extern float f;
+
+int main(){
+	 //Variable defination:
+	 int a,b;
+	 int c;
+	 float f;
+	 
+	 //actual initialization
+	 a=10;
+	 b=20;
+	 c= a + b;
+	 
+	 cout << c << endl ;
+	 
+	 f=70.0/3.0;
+	 cout << f << endl;
+	 
+	 return 0;
+}

arrays/java/unique-digits-of-large-number.java

@@ -0,0 +1,62 @@
+import java.util.*;
+public class UniqueDigitsOfLargeNumber {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner sc=new Scanner(System.in);
+		int l,i,j,l1=0;
+		String s,p="";
+		char c,d;
+		System.out.println("Enter a large number");
+		s=sc.nextLine();
+		l=s.length();
+		for(i=0;i<l;i++)
+		{
+			c=s.charAt(i);
+			for(j=0;j<l1;j++)
+			{
+				if(p.charAt(j)==c)
+					break;
+			}
+			if(j==l1)
+			{
+				p=p+c;
+				l1=p.length();
+			}
+		}
+			System.out.print("The unique digits present in "+Long.parseLong(s)+" are ");
+			if(l1>1)
+			{
+				for(i=0;i<l1-1;i++)
+				{
+					System.out.print(p.charAt(i)+", ");
+				}
+				System.out.println("and "+p.charAt(l1-1)+".");
+				c=p.charAt(0);
+				for(i=0;i<l1;i++)
+				{
+					if(p.charAt(i)>c)
+						c=p.charAt(i);
+				}
+				s="";
+				s=s+c;
+				c--;
+				for(d=c;d>='0';d--)
+				{
+					for(i=0;i<l1;i++)
+					{
+						if(p.charAt(i)==d)
+							s=s+d;
+					}
+				}
+				System.out.println("The largest number possible out of these unique digits is "+Long.parseLong(s));
+			}
+			else
+			{
+				System.out.println(p.charAt(0)+".");
+				System.out.println("The largest number possible out of these unique digits is "+Integer.parseInt(p));
+			}
+		
+	}
+
+}

sorting/README.md

@@ -24,13 +24,17 @@
 
 ### Java
 
+
 1. [Bubble Sort](java/bubble-sort.java)
 2. [Insertion Sort](java/insertion-sort.java)
 3. [Selection Sort](java/selection-sort.java)
 4. [Merge Sort](java/merge-sort.java)
 5. [Quick Sort](java/quick-sort.java)
 6. [Counting Sort](java/counting-sort.java)
-
+7.  [Bubble Sort algo](java/bubble-sort.java)
+8.  [Heap Sort Algo](java/heap-sort.java)
+9.  [Insertion Sort algo](java/insertion-sort.java)
+10. [Selection Sort algo](java/selection-sort.java)
 ### JavaScript
 
 1. [Bubble Sort](js/bubble-sort.js)

sorting/java/bubble-sort.java

@@ -1,36 +1,27 @@
-// Java program for implementation of Bubble Sort 
-class BubbleSort 
-{ 
-    void bubbleSort(int arr[]) 
-    { 
-        int n = arr.length; 
-        for (int i = 0; i < n-1; i++) 
-            for (int j = 0; j < n-i-1; j++) 
-                if (arr[j] > arr[j+1]) 
-                { 
-                    // swap arr[j+1] and arr[j] 
-                    int temp = arr[j]; 
-                    arr[j] = arr[j+1]; 
-                    arr[j+1] = temp; 
-                } 
-    } 
 
-    /* Prints the array */
-    void printArray(int arr[]) 
-    { 
-        int n = arr.length; 
-        for (int i=0; i<n; ++i) 
-            System.out.print(arr[i] + " "); 
-        System.out.println(); 
-    } 
+import java.util.Arrays;
 
-    // Driver method to test above 
-    public static void main(String args[]) 
-    { 
-        BubbleSort ob = new BubbleSort(); 
-        int arr[] = {64, 34, 25, 12, 22, 11, 90}; 
-        ob.bubbleSort(arr); 
-        System.out.println("Sorted array"); 
-        ob.printArray(arr); 
-    } 
+public class BubbleSort {
+	static int temp = 0;
+	static int[] nums = { 13, 34, 12, 45, 56, 32, 20 };
+
+	public static void main(String[] args) {
+
+		System.out.println("Before Sorting : "+Arrays.toString(nums));
+		sort();
+
+	}
+  //create method sorting array
+	public static void sort() {
+		for (int i = 1; i < nums.length; i++) {
+			for (int j = 0; j < i; j++) {
+				if (nums[j] > nums[i]) {
+					temp = nums[j];
+					nums[j] = nums[i];
+					nums[i] = temp;
+				}
+			}
+		}
+		System.out.println(Arrays.toString(nums));
+	}
 }

sorting/java/heap-sort.java

@@ -0,0 +1,69 @@
+
+import java.util.Scanner;
+public class HeapSort 
+{ 
+	public void sort(int array[]) 
+		{
+
+    int n = array.length; 
+    for (int i = n / 2 - 1; i >= 0; i--) 
+			heapify(array, n, i); 
+      for (int i = n-1; i >= 0; i--) 
+		{ 
+			
+			int temp = array[0]; 
+			array[0] = array[i]; 
+			array[i] = temp; 
+
+			 
+			heapify(array, i, 0); 
+		} 
+	} 
+
+
+	void heapify(int array[], int n, int i) 
+	{ 
+		int largest = i;  
+		int l = 2*i + 1; 
+		int r = 2*i + 2;
+   
+  if (l < n && array[l] > array[largest]) 
+			largest = l; 
+if (r < n && array[r] > array[largest]) 
+			largest = r; 
+
+		
+		if (largest != i) 
+		{ 
+			int swap = array[i]; 
+			array[i] = array[largest]; 
+			array[largest] = swap; 
+
+			 
+			heapify(array, n, largest); 
+		} 
+	} 
+  public static void main(String args[]) 
+	{ 
+		 
+		System.out.println("enter the array size");
+   Scanner inputobj = new Scanner(System.in);
+                 int s = inputobj.nextInt();
+                  int array[] = new int[s];
+                 System.out.println("enter " + s + "elements of array");
+                           for(int k=0;k<s;k++)
+{
+int e  = inputobj.nextInt();
+array[k] = e;
+}
+	HeapSort ob = new HeapSort(); 
+		ob.sort(array); 
+
+		System.out.println("Sorted array is"); 
+
+		for (int i=0; i<s; ++i) 
+			System.out.print(array[i]+" "); 
+		System.out.println();
+		
+	} 
+} 

sorting/java/insertion-sort.java

@@ -1,42 +1,29 @@
-// Java program for implementation of Insertion Sort 
-class InsertionSort { 
-    /*Function to sort array using insertion sort*/
-    void sort(int arr[]) 
-    { 
-        int n = arr.length; 
-        for (int i = 1; i < n; ++i) { 
-            int key = arr[i]; 
-            int j = i - 1; 
 
-            /* Move elements of arr[0..i-1], that are 
-               greater than key, to one position ahead 
-               of their current position */
-            while (j >= 0 && arr[j] > key) { 
-                arr[j + 1] = arr[j]; 
-                j = j - 1; 
-            } 
-            arr[j + 1] = key; 
-        } 
-    } 
+import java.util.Arrays;
 
-    /* A utility function to print array of size n*/
-    static void printArray(int arr[]) 
-    { 
-        int n = arr.length; 
-        for (int i = 0; i < n; ++i) 
-            System.out.print(arr[i] + " "); 
+public class InsertionSort {
+	static int[] nums = { 12, 43, 2, 4, 1, 0, -23, -93 };
 
-        System.out.println(); 
-    } 
+	public static void main(String[] args) {
+		System.out.println("Before sorting " + Arrays.toString(nums));
+		sort(nums);
+	}
 
-    // Driver method 
-    public static void main(String args[]) 
-    { 
-        int arr[] = { 12, 11, 13, 5, 6 }; 
+	public static void sort(int[] nums) {
+		int i = 1;
+		while (i < nums.length) {
+			int temp, j;
+			temp = nums[i];
+			j = i;
 
-        InsertionSort ob = new InsertionSort(); 
-        ob.sort(arr); 
+			while (j > 0 && nums[j - 1] > temp) {
+				nums[j] = nums[j - 1];
+				j--;
+			}
+			nums[j] = temp;
+			i++;
+		}
+		System.out.println("After Sorting " + Arrays.toString(nums));
 
-        printArray(arr); 
-    } 
+	}
 }

sorting/java/selection-sort.java

@@ -1,43 +1,50 @@
-// Java program for implementation of Selection Sort 
-class SelectionSort 
+class Selection
 {
-    void sort(int arr[]) 
-    { 
-        int n = arr.length; 
 
-        // One by one move boundary of unsorted subarray 
-        for (int i = 0; i < n-1; i++) 
+    int minIndex(int Array[] , int start, int end)
+    {
+        int minIndex = start;
+
+        for (int i = start+1; i < end; i++) 
         {
-            // Find the minimum element in unsorted array 
-            int min_idx = i; 
-            for (int j = i+1; j < n; j++) 
-                if (arr[j] < arr[min_idx]) 
-                    min_idx = j; 
-  
-            // Swap the found minimum element with the first 
-            // element 
-            int temp = arr[min_idx]; 
-            arr[min_idx] = arr[i]; 
-            arr[i] = temp; 
+            if ( Array[i] < Array[minIndex] ) 
+            {
+                minIndex = i;    
+            }    
         }
+        return minIndex;
     }
-  
-    // Prints the array 
-    void printArray(int arr[]) 
+     int[] sorting(int Array[],int length)
     {
-        int n = arr.length; 
-        for (int i=0; i<n; ++i) 
-            System.out.print(arr[i]+" "); 
-        System.out.println(); 
-    } 
-  
-    // Driver code to test above 
-    public static void main(String args[]) 
-    { 
-        SelectionSort ob = new SelectionSort(); 
-        int arr[] = {64,25,12,22,11}; 
-        ob.sort(arr); 
-        System.out.println("Sorted array"); 
-        ob.printArray(arr); 
+        for (int i = 0; i < length-1; i++) 
+        {
+                int minI = minIndex(Array, i, length);
+                int temp = Array[minI];
+                Array[minI] = Array[i];
+                Array[i] = temp;
+            }
+        return Array;
+    }
+}
+
+/**
+ * SelectionSort
+ */
+public class SelectionSort {
+
+    public static void main(String[] args) {
+        
+        int Array[] = {1,2,3,4,5,6,7,8,9};
+
+        Selection s1 = new Selection();
+        long startTime = System.nanoTime();
+        int sortedArray[] = s1.sorting(Array, 9);
+        long endTime = System.nanoTime();
+
+        for (int i = 0; i < 9; i++) {
+            System.out.println(sortedArray[i]);
+        }
+        System.out.println("Total Time in Neno Second: "+ (endTime-startTime));
+
     }
 }