/in/foo.cc:20:9: warning: character constant too long for its type
   cout<<'right';
         ^~~~~~~
/in/foo.cc:24:10: warning: character constant too long for its type
    cout<<'right';
          ^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:19:23: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(a=10 && s[13]=='x')
                       ^
/in/foo.cc:6:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k,a;
        ^
/in/foo.cc:6:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k,a;
          ^