/in/foo.cc: In function 'int main()':
/in/foo.cc:7:4: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  a >= -10^10 && a<=10^10;
  ~~^~~~~~
/in/foo.cc:7:18: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  a >= -10^10 && a<=10^10;
                 ~^~~~
/in/foo.cc:7:14: warning: statement has no effect [-Wunused-value]
  a >= -10^10 && a<=10^10;
  ~~~~~~~~~~~~^~~~~~~~~~~
/in/foo.cc:8:4: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  b >= -10^10 && b<=10^10;
  ~~^~~~~~
/in/foo.cc:8:18: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  b >= -10^10 && b<=10^10;
                 ~^~~~
/in/foo.cc:8:14: warning: statement has no effect [-Wunused-value]
  b >= -10^10 && b<=10^10;
  ~~~~~~~~~~~~^~~~~~~~~~~