/in/foo.cc: In function 'int main()':
/in/foo.cc:15:8: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  cin>>a+1;
       ~^~
/in/foo.cc:16:8: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  cin>>b+1;
       ~^~