How to print a number in binary form in C/C++?

Question

I am trying to do something like this

char a = 10;
printf("binary representation of a = %b",a);

and expecting

0x1010

Answer 1

You dont have a option like %x for binary numbers so you need to write a function to print or you can create a string and just print that. Try something like

void bin(unsigned n)
{
    unsigned i;
    for (i = 1 << 31; i > 0; i = i / 2)
        (n & i)? printf("1"): printf("0");
}