C++ program to merge two arrays using class

Given two arrays, we to merge them using the class and object approach.
Submitted by Shubh Pachori, on September 15, 2022

Example:

Input: 
Input 1st Array :
[0]: 1
[1]: 3
[2]: 5
[3]: 7
[4]: 9
[5]: 11
[6]: 1
[7]: 3
[8]: 5
[9]: 7

Input 2nd Array :
[0]: 2
[1]: 4
[2]: 6
[3]: 8
[4]: 10
[5]: 12
[6]: 14
[7]: 16
[8]: 18
[9]: 20
Output: 
Merged Array:
1 3 5 7 9 11 1 3 5 7 2 4 6 8 10 12 14 16 18 20

C++ code to merge two arrays using the class and object approach

#include <iostream>
using namespace std;

// create a class
class Array {
  // private data members
 private:
  int arr1[10];
  int arr2[10];

  // public member functions
 public:
  // getArray() function to insert arrays
  void getArray() {
    cout << "Input 1st Array :" << endl;

    for (int index = 0; index < 10; index++) {
      cout << "[" << index << "]:";
      cin >> arr1[index];
    }

    cout << "\nInput 2nd Array :" << endl;

    for (int index = 0; index < 10; index++) {
      cout << "[" << index << "]: ";
      cin >> arr2[index];
    }
  }

  // mergeArray() function to merge two arrays
  void mergeArray() {
    // initialising variables to perform operations
    int temp[20], index;

    // for loop to merge both arrays
    for (index = 0; index < 20; index++) {
      // if condition for 1st array
      if (index < 10) {
        temp[index] = arr1[index];
      }

      // else condition for 2nd array
      else {
        temp[index] = arr2[index - 10];
      }
    }

    cout << "\nMerged Array: " << endl;

    // for loop to print merged array
    for (index = 0; index < 20; index++) {
      cout << temp[index] << " ";
    }
  }
};

int main() {
  // create an object
  Array A;

  // calling getArray() function to 
  // insert the arrays
  A.getArray();

  // calling mergeArray() function to 
  // merge two arrays
  A.mergeArray();

  return 0;
}

Output:

Input 1st Array :
[0]: 1
[1]: 2
[2]: 3
[3]: 4
[4]: 5
[5]: 6
[6]: 7
[7]: 8
[8]: 9
[9]: 10

Input 2nd Array :
[0]: 10
[1]: 9
[2]: 8
[3]: 7
[4]: 6
[5]: 5
[6]: 4
[7]: 3
[8]: 21
[9]: 9

Merged Array:
1 2 3 4 5 6 7 8 9 10 10 9 8 7 6 5 4 3 21 9

Explanation:

In the above code, we have created a class Array, two int type array data members arr1[10] and arr2[10] to store the elements of the array, and public member functions getArray() and mergeArray() to store the array elements and to merge two arrays.

In the main() function, we are creating an object A of class Array, reading the inputted array by the user using getArray() function, and finally calling the mergeArray() member function to merge two arrays. The mergeArray() function contains the logic to merge two arrays and printing the result.

C++ Class and Object Programs (Set 2) »


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