Added remove duplicates

Author: siddhi-244

Recursion/remove_duplicates.cpp

@@ -0,0 +1,27 @@
+#include <iostream>
+#include <string.h>
+using namespace std;
+void removeduplicates(char input[]){
+  if(input[0]=='\0'){
+    return ;//if it is empty string
+  }
+  if(input[0]==input[1]){//checking for consecutive duplicate 
+    for(int i=0;input[i]!='\0';i++){
+      input[i]=input[i+1];//shift to left 
+    }
+    removeduplicates(input);
+  }else{
+  removeduplicates(input+1);
+  }
+}
+
+int main() {
+   char input[1000];
+   cin.getline(input,1000);
+   removeduplicates(input);
+   cout<<input;
+}
+/*Example
+aaaabbbbb
+O/p ab 
+*/