# C++ Print Binary Function

A while back I used a function I found on the web to print off a binary representation of a number while I was working on a blowfish implementation in C++. I haven't finished the blowfish, but I made some changes to the binary function, and thought I'd post it since it is a handy thing to have.

Essentially all I did was set it so it grouped the digits by 4 and padded out the MSB set with 0's so they all line up.

```
void binary(int number,int count=0) {
int remainder;
count++;
if(number <= 1) {
while(count % 4 != 0) {
cout << '0';
count++;
}
cout << number;
return;
}
remainder = number%2;
binary(number >> 1, count);
if(count % 4 == 0)
cout << ' ';
cout << remainder;
}
```

Here's an example program, and the results.

`#include `
using namespace std;
void binary(int number,int count=0) {
...
}
int main () {
binary(0);
cout << endl;
binary(0xFF);
cout << endl;
binary(9872);
cout << endl;
}

```
[email protected]$ ./a.out
0000
1111 1111
0010 0110 1001 0000
[email protected]$
```