/in/foo.cc: In member function 'void Complex::Output()':
/in/foo.cc:27:11: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(real=0)
           ^
/in/foo.cc:32:24: warning: format '%d' expects a matching 'int' argument [-Wformat=]
    printf("%d+%di",real);
                        ^