// 11.Program to find the second largest element of an array
#include<stdio.h>
int main()
{
int a[20],i,large1,large2,size;
printf("Enter the size of the array:");
scanf("%d",&size);
printf("Enter the elements of the array:\n");
for(i=0 ; i< size ; i++)
{
scanf("%d",&a[i]);
}
if(a[0]>a[1]){
large1=a[0];
large2=a[1];
}
else{
large1=a[1];
large2=a[2];
}
for(i=2 ; i<size ;i++)
{
if(a[i]>large1){
large2=large1;
large1=a[i];
}
else if(a[i] > large2 && a[i]<large1){
large2=a[i];
}
}
printf("The second largest element of the array= %d",large2);
return 0;
}

//Program to insert an element at specific position in a sorted array.
#include<stdio.h>
#include<stdlib.h>
int main()
{
int a[50],i,size,position,val;
printf("Enter the size of the array :");
scanf("%d",&size);
if(size > 50) //bound checking
{
printf("Invalid size input");
exit(1);
}
printf("Enter elements into the array(sorted):");
for(i=0; i< size ; i++)
scanf("%d",&a[i]);
printf("Enter at which position you want insert element:");
scanf("%d",&position);
printf("Enter the value to be inserted:");
scanf("%d",&val);
for(i=size-1 ; i>=position-1 ; i--)
{
a[i+1]=a[i];
}
a[position-1]=val;
size++;
printf("Resultant array after insertion:\n");
for(i=0 ; i<size ; i++)
printf("%d\t",a[i]);
return 0;
}

//Program to insert an element at specific position in a unsorted array.
#include<stdio.h>
#include<stdlib.h>
int main()
{
int a[50],i,size,position,val;
printf("Enter the size of the array :");
scanf("%d",&size);
if(size > 50) //bound checking
{
printf("Invalid size input");
exit(1);
}
printf("Enter elements into the array:");
for(i=0; i< size ; i++)
scanf("%d",&a[i]);
printf("Enter at which position you want insert element:");
scanf("%d",&position);
printf("Enter the value to be inserted:");
scanf("%d",&val);
a[size]=a[position-1];
size++;
a[position-1]=val;
printf("Resultant array after insertion:\n");
for(i=0 ; i<size ; i++)
printf("%d\t",a[i]);
return 0;
}

// Program to delete an element at specific position in an array
#include<stdio.h>
#include<stdlib.h>
int main()
{
int a[50],i,size,position,value;
printf("Enter the size of the array:");
scanf("%d",&size);
if(size>50) {
printf("Invalid size input");
exit(1);
}
printf("Enter the array elements:");
for(i=0 ; i<size ; i++)
scanf("%d",&a[i]);
printf("Enter at which position you want to delete the element:");
scanf("%d",&position);
if(position<=0 || position >size) {
printf("Invalid position entered");
exit(1);
}
value=a[position-1];
for(i=position-1 ; i< size-1 ; i++)
{
a[i]=a[i+1];
}
size--;
printf("The deleted element is %d\n",value);
printf("Resultant array after deletion:\n");
for(i=0 ; i< size ;i++)
printf("%d\t",a[i]);
return 0;
}