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:

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Next: Write a program in C to find the second smallest element in an array.
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