Question:C program to find the largest element in an array 

#include<stdio.h>
int main(){
  int a[50],size,i,big;
  printf("\nEnter the size of the array: ");
  scanf("%d",&size);
  printf("\nEnter %d elements in to the array: ”, size);
  for(i=0;i<size;i++)
      scanf("%d",&a[i]);
  big=a[0];
  for(i=1;i<size;i++){
      if(big<a[i])
           big=a[i];
  }
  printf("\nBiggest: %d",big);
  return 0;
}

Question:C program to find the second largest element in an array 

#include<stdio.h>
int main(){
  int a[50],size,i,j=0,big,secondbig;
  printf("Enter the size of the array: ");
  scanf("%d",&size);
  printf("Enter %d elements in to the array: ", size);
  for(i=0;i<size;i++)
      scanf("%d",&a[i]);
 
  big=a[0];
  for(i=1;i<size;i++){
      if(big<a[i]){
           big=a[i];
           j = i;
      }
  }

  secondbig=a[size-j-1];
  for(i=1;i<size;i++){
      if(secondbig <a[i] && j != i)
          secondbig =a[i];
  }
  
  printf("Second biggest: %d", secondbig);
  return 0;
}
Sample output:
Enter the size of the array: 5
Enter 5 elements in to the array: 5 3 2 1 0
Second biggest: 3

Question:C program to find the second smallest element in an array 

#include<stdio.h>
int main(){
  int a[50],size,i,j=0,small,secondsmall;
  printf("Enter the size of the array: ");
  scanf("%d",&size);
  printf("Enter %d elements in to the array: ", size);
  for(i=0;i<size;i++)
         scanf("%d",&a[i]);

  small=a[0];
  for(i=1;i<size;i++){
         if(small>a[i]){
               small=a[i];
               j = i;
      }
  }

  secondsmall=a[size-j-1];
  for(i=1;i<size;i++){
         if(secondsmall > a[i] && j != i)
              secondsmall =a[i];
  }

  printf("Second smallest: %d", secondsmall);
  return 0;
}
Sample Output:
Enter the size of the array: 5
Enter 5 elements in to the array: 5 7 3 2 6
Second smallest: 3

Question:REMOVE DUPLICATE ELEMENTS IN AN ARRAY USING C PROGRAM 

#include<stdio.h>
int main(){
  int arr[50];
  int *p;
  int i,j,k,size,n;
  printf("\nEnter size of the array: ");
  scanf("%d",&n);
  printf("\nEnter %d elements into the array: ",n);
  for(i=0;i<n;i++)
    scanf("%d",&arr[i]);
  size=n;
  p=arr;
  for(i=0;i<size;i++){
    for(j=0;j<size;j++){
         if(i==j){
             continue;
         }
         else if(*(p+i)==*(p+j)){
             k=j;
             size--;
             while(k < size){
                 *(p+k)=*(p+k+1);
                 k++;
              }
              j=0;
          }
      }
  }
  printf("\nThe array after removing duplicates is: ");
  for(i=0;i < size;i++){
    printf(" %d",arr[i]);
  }
  return 0;
}

Question:Write a program (wap) to delete an element at desired position from an array in c language 

#include<stdio.h>
int main(){
  int a[50],i,pos,size;
  printf("\nEnter size of the array: ");
  scanf("%d",&size);

  printf("\nEnter %d elements in to the array: ",size);
  for(i=0;i<size;i++)
            scanf("%d",&a[i]);

  printf("\nEnter position where to delete: ");
  scanf("%d",&pos);

  i=0;
  while(i!=pos-1)
            i++;
  while(i<10){
            a[i]=a[i+1];
            i++;
  }

  size--;
  for(i=0;i<size;i++)
            printf(" %d",a[i]);

  return 0;
}

Question:How to insert or add an element in the array at specific or desired posting by using c programming language? 

#include<stdio.h>
int main(){
int a[50],size,num,i,pos,temp;
printf("\nEnter size of the array: ");
scanf("%d",&size);
printf("\nEnter %d elements in to the array: ",size);
for(i=0;iscanf("%d",&a[i]);
printf("\nEnter position and number to insert: ");
scanf("%d %d",&pos,&num);
i=0;
while(i!=pos-1)
i++;
temp=size++;
while(i{
a[temp]=a[temp-1];
temp--;
}
a[i]=num;
for(i=0;iprintf(" %d",a[i]);
return 0;
}

Question:C code to find largest and smallest number in an array 

#include<stdio.h>
int main(){
  int a[50],size,i,big,small;

  printf("\nEnter the size of the array: ");
  scanf("%d",&size);
  printf("\nEnter %d elements in to the array: ", size);
  for(i=0;i<size;i++)
      scanf("%d",&a[i]);

  big=a[0];
  for(i=1;i<size;i++){
      if(big<a[i])
           big=a[i];
  }
  printf("Largest element: %d",big);
 
  small=a[0];
  for(i=1;i<size;i++){
      if(small>a[i])
           small=a[i];
  }
  printf("Smallest element: %d",small);

  return 0;
}
Sample Output:
Enter the size of the array: 4
Enter 4 elements in to the array: 2 7 8 1
Largest element: 8
Smallest element: 1