Question

How to convert octal number to binary number in C++

Answer 1

#include <iostream>

long long OctalToBinary(int octal);
long long OctalToDecimal(int octal);

int main()
{
	int octal = 753;

	std::cout << "Binary  = " << OctalToBinary(octal) << std::endl;

	return 0;
}

long long OctalToBinary(int octal)
{
	int i = 1;
	long long binary = 0;

	int decimal = OctalToDecimal(octal);

	while (decimal != 0)
	{
		binary += (decimal % 2) * i;
		decimal /= 2;
		i *= 10;
	}

	return binary;
}
long long OctalToDecimal(int octal)
{
	int decimal = 0, i = 0;

	while (octal != 0)
	{
		decimal += (octal % 10) * pow(8, i);
		i++;
		octal /= 10;
	}

	return decimal;
}

/*
run:

Binary  = 111101011

*/

 

70+ SQL courses for beginners and professionals