chore(CPlusPlus): create reverse-array.cpp (#283)

algorithms/CPlusPlus/Arrays/reverse-array.cpp

@@ -0,0 +1,33 @@
+//Description : This program reverses array elements using two pointer method.
+//Time Complexity : O(n), where n is the array size
+//Auxiliary Space : O(1)
+#include<bits/stdc++.h>
+using namespace std ;
+void reverse_array(vector<int> arr){
+// Here we will use two pointer approach
+int low = 0 ;     //First pointer at the beginning of the array
+int high = arr.size()-1;  //Second pointer at the end of the array
+
+while(low < high){
+  //Swapping array items at the low and high index
+  swap(arr[low],arr[high]);
+  low++;  //Incrementing the low pointer
+  high--; //Decrementing the high pointer
+}
+
+  for(int i = 0; i < arr.size() ; i++){
+  cout<<arr[i]<<" ";
+  }
+}
+int main(){
+  int n ; //Size of the array
+  cin>>n;
+  int item ;
+  std::vector<int> arr ;
+  while(n--){
+  cin>>item;
+  arr.push_back(item); 
+  }
+  reverse_array(arr) ; //Function call
+  return 0;
+}

algorithms/CPlusPlus/README.md

@@ -7,6 +7,7 @@
 4. [Max Subarray Sum](Arrays/max-subarray-sum.cpp)
 5. [Shift Negatives](Arrays/shift-negatives.cpp)
 6. [Boyer–Moore Voting Algorithm](Arrays/boyer_more.cpp)
+7. [Reverse Array](Arrays/reverse-array.cpp)
 
 ## Graphs
 1. [Bellman Ford Algorithm](Graphs/bellmam-ford.cpp)