C Exercises: Find the second largest element in an array

C Array: Exercise-16 with Solution

Write a program in C to find the second largest element in an array.

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h>

void main(){
  int arr1[50],n,i,j=0,lrg,lrg2nd;
  
       printf("\n\nFind the second largest element in an array :\n");
       printf("-------------------------------------------------\n");  
  
       printf("Input the size of array : ");
       scanf("%d", &n);
    /* Stored values into the array*/
       printf("Input %d elements in the array :\n",n);
       for(i=0;i<n;i++)
            {
	      printf("element - %d : ",i);
	      scanf("%d",&arr1[i]);
	    }
/* find location of the largest element in the array */		
//   lrg=arr1[0];
   lrg=0;
  for(i=0;i<n;i++)
  {
      if(lrg<arr1[i])
	  {
           lrg=arr1[i];
           j = i;
      }
  }

/* ignore the largest element and find the 2nd largest element in the array */		
   lrg2nd=0;
  for(i=0;i<n;i++)
  {
     if(i==j)
        {
          i++;  /* ignoring the largest element */
		  i--;
        }
      else
        {
          if(lrg2nd<arr1[i])
	     {
               lrg2nd=arr1[i];
             }
        }
  }

  printf("The Second largest element in the array is :  %d \n\n", lrg2nd);
}

Sample Output:

Find the second largest element in an array :                                                                 
-------------------------------------------------                                                             
Input the size of array : 5                                                                                   
Input 5 elements in the array :                                                                               
element - 0 : 2                                                                                               
element - 1 : 9                                                                                               
element - 2 : 1                                                                                               
element - 3 : 4                                                                                               
element - 4 : 6                                                                                               
The Second largest element in the array is : 6   

Flowchart:

C Programming Code Editor:

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