/in/foo.c: In function 'main':
/in/foo.c:7:6: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if(a<=b&b<=c)
     ~^~~
/in/foo.c:9:6: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if(a<=c&c<=b)
     ~^~~
/in/foo.c:11:6: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if(b<=a&a<=c)
     ~^~~
/in/foo.c:13:6: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if(b<=c&c<=a)
     ~^~~
/in/foo.c:15:6: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if(c<=a&a<=b)
     ~^~~
/in/foo.c:17:6: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if(c<=b&b<=a)
     ~^~~