Convert Binary to Octal

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

int binaryToDecimal(long long binary) {
    int decimal = 0, i = 0, remainder;
    while (binary != 0) {
        remainder = binary % 10;
        binary /= 10;
        decimal += remainder * pow(2, i);
        ++i;
    }
    return decimal;
}

int decimalToOctal(int decimal) {
    long long octal = 0;
    int remainder, i = 1;
    while (decimal != 0) {
        remainder = decimal % 8;
        decimal /= 8;
        octal += remainder * i;
        i *= 10;
    }
    return octal;
}

int main() {
    long long binary;
    cout << "Enter a binary number: ";
    cin >> binary;
    
    int decimal = binaryToDecimal(binary);
    long long octal = decimalToOctal(decimal);
    
    cout << "Binary: " << binary << " = Octal: " << octal << endl;
    
    return 0;
}