Convert number to binary

[Wynd]

What is an easy way to convert a number its binary equivalent? There used to be an example on cplusplus.com using printf() but now it's not there.

[SteveCRM]

cout<<bin(33);

don't remember the header....stdio.h? math.h?

[kedaman]

what do you need it for? usually the convertion is superfluous itself if it isn't for output

[Wynd]

It is for output. I just thought it would be neat to make, because I have seen a converter in javascript and VB, but not in C++.

[kedaman]

if it wasn't for the microsoft compilers restricted ability to use template recursion with terminators (or maybe it could be done but i don't know how) i would have coded a neat piece of converter using templates.

I think _itoa lets you specify radix when you convert to string, specify 2

[Vlatko]

You can easily make your own function to convert decimal to binary numbers. Just use the modulus operetor. Very easy.

[kedaman]

I'd use bitshift and bitwise and

[TadaTensai]

How exactly would this function be made?

void dec2bin(int decimal, char * buffer);

.... Finish?

[CornedBee]

#include "stdlib.h"
#include "stdio.h"

int main(int argc, char* argv[])
{
	int i = 123;
	printf("%08x\n", i);
	char str[33];
	_itoa(i, str, 2);
	printf("%s\n", str);
	return 0;
}