Int to Binary Conversion explanation

Question

My question is based on this post: Decimal to Binary and it\'s chosen solution.

I can get the chosen answer code working, but it only works for 5 bits. How do I modi

Answer 1

I'm not good at english, sorry. You need to adjust the local variable 'mask' too.

#include 

void getBin(int num, char *str)
{
  *(str+8) = '\0';
  int mask = 0x80 << 1;
  while(mask >>= 1)
    *str++ = !!(mask & num) + '0';
}

int main()
{
  char str[9];
  getBin(10, str);
  printf("%s\n", str);
  return 0;
}

I want to explain why this code is working well. but... I'm not good at english... I just hope it's helpful/