/in/foo.c: In function 'main':
/in/foo.c:13:2: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  else if(a=b)
  ^~~~
/in/foo.c:24:2: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  else if(a=c)
  ^~~~
/in/foo.c:35:2: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  else if(b=c)
  ^~~~