C++ Program to Insert an Element in an Array2 min read

In this tutorial, we will learn and write a program to insert an element in an array in C++. To understand the coding, you should have knowledge of the following topics in C++ programming:

We will learn two ways to insert an element in an array in C++:

  1. Insert an element at the end of an array
  2. Insert an element at a specific position of an array

1. Insert an element at the end of an array

The program takes user input for the size and the values of elements of an array.

Also takes the user inputs for the value of an element to be inserted at the end of an array. Lastly, displays the new array formed after insertion.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
//C++ Program to insert an Element in an array
#include <iostream>
using namespace std;
 
int main()
{
  int arr[30], size, i, insElem, count = 0;
 
  cout << "Enter the size of an array (Max size: 30): ";
  cin >> size;
 
  cout << "Enter array elements:\n";
  for (i = 0; i < size; i++)
    cin >> arr[i];
 
  cout << "\nEnter element to be inserted: ";
  cin >> insElem;
  
  arr[i] = insElem;
  
  //Display new array
  cout << "New Array after Insertion:\n";
  for (i = 0; i < (size+1); i++)
      cout << arr[i] << " ";
 
  return 0;
}

Output:

insert element in an array in C++

2. Insert Element in Array at a Specific Position

Here too, the program takes input from the user but in addition to the above, the position at which the element is to be inserted is also taken as user input.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
//C++ Program to insert an Element at any position
#include <iostream>
using namespace std;
 
int main()
{
  int arr[30], size, pos, i, insElem, count = 0;
 
  cout << "Enter the size of an array (Max size: 30): ";
  cin >> size;
 
  cout << "Enter array elements:\n";
  for (i = 0; i < size; i++)
    cin >> arr[i];
 
  cout << "\nEnter element to be inserted: ";
  cin >> insElem;
 
  cout << "Enter the position: "; //position specified
  cin >> pos;
 
  for (i = size; i >= pos; i--)
    arr[i] = arr[i - 1];
 
  arr[i] = insElem;
 
  //Display new array
  cout << "New Array after Insertion:\n";
  for (i = 0; i < (size + 1); i++)
    cout << arr[i] << " ";
 
  return 0;
}

Output:

Enter the size of an array (Max size: 30): 5
Enter array elements:
1
2
3
4
5

Enter element to be inserted: 6
Enter the position: 3
New Array after Insertion:
1 2 6 3 4 5

MORE

Java Program to find the sum of the Largest Forward Diagonal

in this tutorial, we will write a java program to find the sum of the Largest Forward Diagonal in an Arraylist (matrix). Java Program to …

Read More

C Program to search an element in an array using Pointers

A separate function( search_function()) will be created where the array pointer will be declared and the searched element along with the size of an array …

Read More

C Program to find the sum of the digits of a number using recursion function

This C program calculates the sum of digits of a given number using recursion. Here’s a concise explanation: Function Definition: sumDigits(int n) This function calculates …

Read More

C program to find factorial of a number using Ternary operator with Recursion

Recursion refers to the function calling itself directly or in a cycle. Before we begin, you should have the knowledge of following in C Programming: …

Read More

C Program to Add Two Numbers Using Call by Reference

The program takes the two numbers from the user and passes the reference to the function where the sum is calculated. You may go through …

Read More

Find the output ab, cd, ef, g for the input a,b,c,d,e,f,g in Javascript and Python

In this tutorial, we will write a program to find a pairs of elements from an array such that for the input [a,b,c,d,e,f,g] we will …

Read More