Question

1. Write a C++ function to insert new items into an array and move the rest of the contents down. If we assume that there are places left in the array:

int array[10] = {1, 2, 3};

There are 7 places left in the array to allow insertion. Below is the header for the function you are to write:

void insertInArray(int arr[], const int position, const int newItem)

Answer 1

Code-

#include <iostream>
using namespace std;
//function declare
void insertInArray(int arr[], const int position, const int newItem);
int main()
{
//variable declare
int arr[100], position, i, n, newItem;
//ask user to enter number of elements in array
cout<<"Enter number of elements in array\n"<<endl;
cin>>n;
//enter element in array
cout<<"Enter elements "<<n<<endl;
//store element in array arr
for (i = 0; i < n; i++)
cin>>arr[i];

//location of the element to be inserted ask user
cout<<"Enter the location where you wish to insert an element\n"<<endl;
cin>>position;
//ask user value to insert
cout<<"Enter the value to insert\n"<<endl;
cin>>newItem;
//function call insertInArray
insertInArray(arr,position,newItem);
//print the array after insertion
cout<<"Resultant arr is\n"<<endl;

for (i = 0; i <= n; i++)
cout<<arr[i]<<" ";

return 0;
}
//function to insert element in array
void insertInArray(int arr[], const int position, const int newItem){
//variable declare
int i =0,n=100;
//shift the element forward
for (i = n - 1; i >= position - 1; i--)
arr[i+1] = arr[i];
//insert the element at position
arr[position-1] = newItem;

}

Screenshots -