Write a C++ Program to Find Duplicate Elements in an Array

By | 27.12.2016

Duplicate Elements in an Array

Write a C++ Program to Find Duplicate Elements in an Array. Here’s simple Program to Find Duplicate Elements in an Array in C++ Programming Language.

What is an Array ?

Arrays a kind of data structure that can store a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.

Instead of declaring individual variables, such as number0, number1, …, and number99, you declare one array variable such as numbers and use numbers[0], numbers[1], and …, numbers[99] to represent individual variables. A specific element in an array is accessed by an index.

All arrays consist of contiguous memory locations. The lowest address corresponds to the first element and the highest address to the last element.

Here is source code of the C++ Program to Find Duplicate Elements in an Array. The C++ program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.


/*  C++ Program to Find Duplicate Elements in an Array  */


using namespace std;

int main()
    int i,j,a[50],size;
    cout<<"Enter array size( Max:50 ) :: ";
        cout<<"\nEnter array elements :: \n";

        for(i=0; i<size; i++)
            cout<<"\nEnter arr["<<i<<"] Element :: ";

  cout<<"\nStored Data in Array :: \n\n";

  cout<<" "<<a[i]<<" ";

  cout<<"\n\nDuplicate Values in Given Array are :: \n\n";
  for(i=0; i<size; i++)
    cout<<" "<<a[i]<<" ";


  return 0;


/*  C++ Program to Find Duplicate Elements in an Array  */

Enter array size( Max:50 ) :: 8

Enter array elements ::

Enter arr[0] Element :: 1

Enter arr[1] Element :: 2

Enter arr[2] Element :: 3

Enter arr[3] Element :: 4

Enter arr[4] Element :: 5

Enter arr[5] Element :: 2

Enter arr[6] Element :: 3

Enter arr[7] Element :: 6

Stored Data in Array ::

 1  2  3  4  5  2  3  6

Duplicate Values in Given Array are ::

 2  3

Process returned 0

Above is the source code for C++ Program to Find Duplicate Elements in an Array which is successfully compiled and run on Windows System.The Output of the program is shown above .

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About Tunde A

My name is Tunde Ajetomobi, a Tech Enthusiast and Growth Hacker. I enjoy creating helpful content that solves problem across different topics. Codezclub is my way of helping young aspiring programmers and students to hone their skills and find solutions on fundamental programming languages.

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Rao Atif Mahmood

Very much useful website