/in/foo.cc: In function 'int f(int)':
/in/foo.cc:6:19: error: 'n' was not declared in this scope
    else return (4*n-2)*h(i-1)/(n+1);
                   ^
/in/foo.cc:6:29: error: 'h' was not declared in this scope
    else return (4*n-2)*h(i-1)/(n+1);
                             ^