/in/foo.c: In function 'main':
/in/foo.c:6:8: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  (-2^31<=a)&&(a<=2^31-1);
      ~~^~~
/in/foo.c:6:19: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
  (-2^31<=a)&&(a<=2^31-1);
                   ^
/in/foo.c:6:2: warning: statement with no effect [-Wunused-value]
  (-2^31<=a)&&(a<=2^31-1);
  ^
/in/foo.c:7:8: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  (-2^31<=b)&&(b<=2^31-1);
      ~~^~~
/in/foo.c:7:19: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
  (-2^31<=b)&&(b<=2^31-1);
                   ^
/in/foo.c:7:2: warning: statement with no effect [-Wunused-value]
  (-2^31<=b)&&(b<=2^31-1);
  ^
/in/foo.c:8:8: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  (-2^31<=c)&&(c<=2^31-1);
      ~~^~~
/in/foo.c:8:19: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
  (-2^31<=c)&&(c<=2^31-1);
                   ^
/in/foo.c:8:2: warning: statement with no effect [-Wunused-value]
  (-2^31<=c)&&(c<=2^31-1);
  ^