Question

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

Answer 1

#include <stdio.h>
#include <limits.h>
  
void print2largest(int arr[], int size) { 
    if (size < 2) { 
        printf("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]; 
        } 
    } 
    printf("The two largest elements are: %d %d", 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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