/in/foo.cc: In function 'int main()':
/in/foo.cc:14:29: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   14 |                 if(binary[i]='1'){
/in/foo.cc:15:34: error: 'pow' is not a member of 'std'
   15 |                         a +=std::pow(2, length - i - 1);
      |                                  ^~~