Why template function is not taking string as argument ? Thanks :D

Question

example :
when I included string header and iostream

template <class T,class T1>
void funtion(T a,T1 b)
{

}
int main()
{
int a;string b;
function( a, b);

}

Answer 1

It does

http://www.sololearn.com/app/cplusplus/playground/cz2W3qgP4rbH/

Answer 2

to feel free can anyone write code for my question plz ?