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C++ program to convert octal number to binary number using class

Submitted by Shubh Pachori, on August 08, 2022

Problem statement

Given an octal number, we have to convert it to binary number using the class and object approach.

Example:

Input:
Enter Octal Number: 25

Output:
Binary Digit: 10101

C++ code to convert octal number to binary number using class and object approach

#include <iostream>
#include <cmath>
using namespace std;

// create a class
class OctalToBinary {
  // private data member
 private:
  int octal;

  // public functions
 public:
  // getOctal() function to get Octal Number
  void getOctal() {
    cout << "Enter Octal Number:";
    cin >> octal;
  }

  // OToB() function to convert octal to binary
  long long OToB() {
    // initialising variables to perform operations
    int decimal = 0, index = 0;
    long long binary = 0;

    // while loop to convert octal to decimal
    while (octal != 0) {
      decimal = decimal + (octal % 10) * pow(8, index);
      index++;
      octal = octal / 10;
    }

    index = 1;

    // while loop to convert decimal to binary
    while (decimal != 0) {
      binary = binary + (decimal % 2) * index;
      decimal = decimal / 2;
      index = index * 10;
    }

    // returning binary digit
    return binary;
  }
};

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

  // initialize a int type variable to store the value
  int b;

  // calling getOctal() function to insert the Octal Number
  O.getOctal();

  // calling OToB() function to convert it
  b = O.OToB();

  cout << "Binary Digit:" << b;

  return 0;
}

Output

Enter Octal Number:31
Binary Digit:11001

Explanation

In the above code, we have created a class OctalToBinary, one int type data member octal to store the octal number, and public member functions getOctal() and OToB() to store and convert the given octal number to a binary digit number.

In the main() function, we are creating an object O of class OctalToBinary, reading the octal number given by the user using getOctal() function, and finally calling the OToB() member function to convert the given octal number. The OToB() function contains the logic to convert the given octal number to binary number and printing the result.

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