Question

How to find the largest two elements in an array with C++

Answer 1

#include <iostream>
#include <climits>
   
void print2largest(int arr[], int size) { 
    if (size < 2) { 
        std::cout << "array size < 2"; 
        return; 
    } 
       
    int first, second; 
      
    first = second = INT_MIN; 
   
    for (int i = 0; i < size ; i ++) { 
        if (arr[i] > first) { 
            second = first; 
            first = arr[i]; 
        } 
        else if (arr[i] > second) { 
            second = arr[i]; 
        } 
    } 
    std::cout << "The two largest elements are: " << first << " " << second; 
} 
      
      
int main() 
{ 
    int arr[] = {3, 4, 9, 6, 7, 1, 2, 5}; 
    int size = sizeof(arr)/sizeof(arr[0]); 
       
    print2largest(arr, size); 
       
    return 0; 
} 
   
   
   
/*
run:
        
The two largest elements are: 9 7
        
*/

 

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