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

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

String Pattern Programs in C

In this tutorial, we will write various C pattern programs for String. Before that, you may go through the following topics in C. for loop …
Read More

Java Program to Find pair of Integers in Array whose sum is given Number

In this tutorial, we will write a program to find a pair of elements from an array whose sum equals a given number in java …
Read More

Program to Print Diamond Alphabet Patterns in C

In this tutorial, we will learn to write a C program to print Diamond patterns using alphabets/characters. However, in this tutorial, we will create a …
Read More

Half Diamond Pattern in C using Alphabets

In this tutorial, we will learn and code the half diamond alphabet patterns in C programming language. However, in this tutorial, we will create a …
Read More

Half Pyramid of Alphabets in C

In this tutorial, we will learn and code alphabet patterns in C programming language specifically the Half pyramid of alphabets in C programming. However, in …
Read More