Added Jump Search

Searching/c++/jump-search.cpp

@@ -0,0 +1,46 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int jumpSearch(int arr[], int x, int n)
+{
+
+    int step = sqrt(n);
+    int prev = 0;
+    while (arr[min(step, n)-1] < x)
+    {
+        prev = step;
+        step += sqrt(n);
+        if (prev >= n)
+            return -1;
+    }
+
+    while (arr[prev] < x)
+    {
+        prev++;
+
+        if (prev == min(step, n))
+            return -1;
+    }
+    if (arr[prev] == x)
+        return prev;
+
+    return -1;
+}
+
+int main()
+{
+    int n,i;
+    cout<<"Eneter size of array : ";
+    cin>>n;
+    cout<<"Enter elements of array"<<endl;
+    int a[n];
+    for(i=0;i<n;i++)
+        cin>>a[i];
+    sort(a,a+n);
+    cout<<"Enter key to be searched : ";
+    int key;
+    cin>>key;
+    int index = jumpSearch(a, key, n);
+    cout << "\nNumber " << key << " is at index " << index;
+    return 0;
+}