Convert Binary Number to Octal and vice-versa in c++ source code - www.alighalehban.com

bin<>oct.cpp

#include <iostream>
#include <cmath>
 
using namespace std;
 
int convertBinarytoOctal(long long);
int main()
{
    long long binaryNumber;
 
    cout << "Enter a binary number: ";
    cin >> binaryNumber;
 
    cout << binaryNumber << " in binary = " << convertBinarytoOctal(binaryNumber) << " in octal ";
 
    return 0;
}
 
int convertBinarytoOctal(long long binaryNumber)
{
    int octalNumber = 0, decimalNumber = 0, i = 0;
 
    while(binaryNumber != 0)
    {
        decimalNumber += (binaryNumber%10) * pow(2,i);
        ++i;
        binaryNumber/=10;
    }
 
    i = 1;
 
    while (decimalNumber != 0)
    {
        octalNumber += (decimalNumber % 8) * i;
        decimalNumber /= 8;
        i *= 10;
    }
 
    return octalNumber;
}