Question

How to convert octal number to binary number in C

Answer 1

#include <stdio.h> 
#include <math.h> 
 
long OctalToBinary(int octal);
long OctalToDecimal(int octal);

int main(void)
{
	int octal = 753;

	printf("Binary  = %ld\n", OctalToBinary(octal));

	return 0;
}

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

	int decimal = OctalToDecimal(octal);

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

	return binary;
}
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
 
*/

 

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