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C++ program to print the sum of all odd and even numbers in a range using class

Submitted by Shubh Pachori, on September 04, 2022

Problem statement

Given a range, we have to print the sum of all odd and even numbers in that range using the class and object approach.

Example:

Input: 
Enter Range : 1 10

Output: 
Sum of all even numbers is 30
Sum of all odd numbers is 25

C++ code to print the sum of all odd and even numbers in a range using the class and object approach

#include <iostream>
using namespace std;

// create a class
class OddEven {
  // private data members
 private:
  int start, end;

  // public member function
 public:
  // getRange() function to enter range
  void getRange() {
    cout << "Enter Range : ";
    cin >> start >> end;
  }

  // sumOddEven() function to add all 
  // odd and even numbers
  void sumOddEven() {
    // initializing int type variables 
    // to perform operations
    int index, sum_even = 0, sum_odd = 0;

    // for loop to traverse all numbers in the range
    for (index = start; index <= end; index++) {
      // condition to check even numbers
      if (index % 2 == 0) {
        // adding all even numbers in the range
        sum_even = sum_even + index;
      }

      // condition for odd numbers
      else {
        // adding all odd numbers in the range
        sum_odd = sum_odd + index;
      }
    }

    cout << "Sum of all even numbers is " << sum_even << "\n"
         << "Sum of all odd numbers is " << sum_odd << endl;
  }
};

int main() {
  // create a object
  OddEven O;

  // calling getRange() function to get range
  O.getRange();

  // sumOddEven() function to find 
  // sum of all even and odd numbers
  O.sumOddEven();

  return 0;
}

Output

Enter Range : 1 6
Sum of all even numbers is 12
Sum of all odd numbers is 9

Explanation

In the above code, we have created a class OddEven, two int type data members start and end to store the start and end of the range, and public member functions getRange() and sumOddEven() to store range and to print sum of the all odd and even numbers in between that given range.

In the main() function, we are creating an object O of class OddEven, reading a range by the user using getRange() function, and finally calling the sumOddEven() member function to print the sum of all odd and even numbers in the given range. The sumOddEven() function contains the logic to print the sum of all odd and even numbers in the given range and printing the result.

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