Program to find the first repeating element in an array of integers in C++

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#include <bits/stdc++.h>
using namespace std;

int main() {
   int array[100], n, i;
   cout << "Enter number of elements: ";
   cin >> n;
   cout << "\nEnter elements: ";
   for (i = 0; i < n; i++)
      cin >> array[i];

   cout << "Original array: ";

   for (int i = 0; i < n; i++)
      cout << array[i] << " ";

   // selecting an element

   for (int i = 0; i < n; i++)
      // traversing to check repetition
      for (int j = i + 1; j < n; j++)
         if (array[i] == array[j]) {
            cout << "\nFirst repeating integer is " << array[i];
            return 0;
         }

   cout << "No integer repeated\n";
   return 0;
}

 

Output

Enter number of elements: 5

Enter elements: 1 2 3 4 5
Original array: 1 2 3 4 5
No integer repeated

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