C++

// C++ program for find the largest 
// three elements in an array 
#include <bits/stdc++.h> 
using namespace std; 

// Function to print three largest elements 
void print3largest(int arr[], int arr_size) 
{ 
	int first, second, third; 

	// There should be atleast three elements 
	if (arr_size < 3) 
	{ 
		cout << " Invalid Input "; 
		return; 
	} 

	third = first = second = INT_MIN; 
	for(int i = 0; i < arr_size; i++) 
	{ 
		
		// If current element is 
		// greater than first 
		if (arr[i] > first) 
		{ 
			third = second; 
			second = first; 
			first = arr[i]; 
		} 

		// If arr[i] is in between first 
		// and second then update second 
		else if (arr[i] > second) 
		{ 
			third = second; 
			second = arr[i]; 
		} 

		else if (arr[i] > third) 
			third = arr[i]; 
	} 

	cout << "Three largest elements are "
		<< first << " " << second << " "
		<< third << endl; 
} 

// Driver code 
int main() 
{ 
	int arr[] = { 12, 13, 1, 10, 34, 1 }; 
	int n = sizeof(arr) / sizeof(arr[0]); 
	
	print3largest(arr, n); 
	return 0; 
}