Introduction
I have used Visual Studio 2012 for debugging purpose. But you can use any version of visul studio as per your availability.
Write C# program to count total duplicate elements in an array
using System;
class Program
{
static void Main()
{
int[] arr = new int[100];
int i, j, num, count = 0;
//Reads size of the array
Console.WriteLine("Enter size of the array: ");
num = Convert.ToInt32(Console.ReadLine());
//Reads elements in array
Console.WriteLine("Enter elements in the array: ");
for (i = 0; i < num; i++)
{
arr[i] = Convert.ToInt32(Console.ReadLine());
}
//Find all duplicate elements in array
for (i = 0; i < num; i++)
{
for (j = i + 1; j < num; j++)
{
// If duplicate element found then increment count by 1
if (arr[i] == arr[j])
{
count++;
break;
}
}
}
Console.WriteLine("\n Total number of duplicate elements found in array:"+count);
Console.ReadLine();
}
}
Result
