/in/foo.cc: In function 'int main()':
/in/foo.cc:18:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         cin >> t1+1;
                ~~^~
/in/foo.cc:20:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         cin >> t2+1;
                ~~^~