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C++ program to print deficient numbers in a range using class

Given a range, we have to print deficient numbers in that range using the class and object approach.
Submitted by Shubh Pachori, on October 05, 2022

Example:

Input: 
Enter Start : 10
Enter End : 20

Output: 
Deficient Numbers in range 10 to 20 : 
10 11 13 14 15 16 17 19

C++ code to print deficient numbers in a range using the class and object approach

#include <iostream>
using namespace std;

// create a class
class Deficient {
  // private data member
 private:
  int start, end;

  // public member functions
 public:
  // getRange() function to insert range
  void getRange() {
    cout << "Enter Start : ";
    cin >> start;

    cout << "Enter End : ";
    cin >> end;
  }

  // isDeficient() function to print 
  // the deficient number
  // lies in the range
  void isDeficient() {
    // initialising  int type variables 
    // to perform operations
    int index_1, index_2, sum = 0;

    cout << "\nDeficient Numbers in range " << start << " to " << end << " : "
         << endl;

    // for loop to check numbers lies in the range
    for (index_1 = start; index_1 <= end; index_1++) {
      sum = 0;

      // for loop to check the number
      for (index_2 = 1; index_2 <= index_1; index_2++) {
        // if condition to check if the number is
        // multiple of the index_2
        if (index_1 % index_2 == 0) {
          sum = sum + index_2;
        }
      }

      if (sum < (2 * index_1)) {
        cout << index_1 << " ";
      }
    }
  }
};

int main() {
  // create an object
  Deficient D;

  // calling getRange() function to
  // insert the range
  D.getRange();

  // calling isDeficient() function to print
  // deficient numbers lies in the range
  D.isDeficient();

  return 0;
}

Output

Enter Start : 1
Enter End : 20

Deficient Numbers in range 1 to 20 : 
1 2 3 4 5 7 8 9 10 11 13 14 15 16 17 19

Explanation

In the above code, we have created a class Deficient, two int type data members start and end to store the start and end of the range, and public member functions getRange() and isDeficient() to store and print deficient numbers in between that given range.

In the main() function, we are creating an object D of class Deficient, reading a range by the user using getRange() function, and finally calling the isDeficient() member function to print the deficient numbers in the given range. The isDeficient() function contains the logic to print deficient numbers in the given range and printing the result.

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