Home » C++ Programs

C++ program to find the sum of all elements of the array using class

Submitted by Shubh Pachori, on August 22, 2022

Problem statement

Given an array, we have to find the sum of all elements of the array using the class and object approach.

Example:

Input: 
array[0]: 5
array[1]: 6
array[2]: 7
array[3]: 8
array[4]: 9

Output:
Sum of all elements of the array is 35

C++ code to find the sum of all elements of the array using the class and object approach

#include <iostream>

using namespace std;

// create a class
class Array {
  // private data member
  private:
    int array[5];

  // public functions
  public:
    // putArray() function to get the value of the array
    void putArray() {
      for (int index = 0; index <= 4; index++) {
        cout << "array[" << index << "]:";
        cin >> array[index];
      }
    }

  // add() function to find the sum of all numbers of the array
  int add() {
    int sum = 0;

    // for loop to add all elements of the array one by one
    for (int index = 0; index <= 4; index++) {
      sum = sum + array[index];
    }

    // returning the Sum
    return sum;
  }
};

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

  // int type variable to store the Sum of all numbers in it
  int sum;

  // function is called by the object to store the array
  A.putArray();

  // add() function to add all elements of the array
  sum = A.add();

  cout << "Sum of all elements of the array is " << sum;

  return 0;
}

Output

array[0]:1
array[1]:2
array[2]:3
array[3]:4
array[4]:5
Sum of all elements of the array is 15

Explanation

In the above code, we have created a class Array, one int type array data member array[5] to store the values of the array, and public member functions  putArray() and add() to store the given values in array and to find out the sum of all elements of the array.

In the main() function, we are creating an object A of class Array, reading an integer values by the user of the array using the putArray() function, and finally calling the add() member function to find the sum of all elements of the given array. The add() function contains the logic to find out the sum of all elements of the given array and printing the result.

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