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C++ program to find the product of all digits of a number using class

Submitted by Shubh Pachori, on August 22, 2022

Problem statement

Given a number, we have to find the product of all digits of a number using the class and object approach.

Example:

Input:
Enter Number: 12345

Output:
Product of all digits of the number is 120

C++ code to find out the product of all digits of a number using the class and object approach

#include <iostream>

using namespace std;

// create a class
class Product {
  // private data member
  private:
    int number;

  // public functions
  public:
    // getNumber() function to get the number
    void getNumber() {
      cout << "Enter Number:";
      cin >> number;
    }

  // multiply() function to find the product of all digits of the number
  int multiply() {
    int product = 1, remain;

    while (number) {

      // the last digit of number is stored in remain by % operator
      remain = number % 10;

      // remain is multiplied in the product
      product = product * remain;

      // number is divided by 10 to discard the last digit
      number = number / 10;
    }

    // returning the product
    return product;
  }
};

int main() {
  // create a object
  Product P;

  // int type variable to store the product of all digits in it
  int product;

  // function is called by the object to store the number
  P.getNumber();

  // multiply() function to multiply all digits of the number
  product = P.multiply();

  cout << "Product of all digits of the number is " << product;

  return 0;
}

Output

Enter Number:9876
Product of all digits of the number is 3024

Explanation

In the above code, we have created a class named Product, an int type data member number to store the number, and public member functions getNumber() and multiply() to store and find out the product of all digits of the given number.

In the main() function, we are creating an object P of class Product, reading an integer number by the user using getNumber() function, and finally calling the multiply() member function to find out the product of all digits of a given integer number. The multiply() function contains the logic to find out the product of all digits of the given number and printing the result.

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