2.30

#include<iostream>
#include<cmath>
using namespace std;
int sroot(int i)
{
return sqrt(i);
}
long sroot(long l)
{
return sqrt(l);
}
double sroot(double d) 
{
return sqrt(d);
}
int main()
{
int  i=9;
long l=1522756;
double d=1.21;
cout<<"sqrt(i)="<<sqrt(i)<<endl;
cout<<"sqrt(l)="<<sqrt(l)<<endl;
cout<<"sqrt(d)="<<sqrt(d)<<endl;
return 0;

 
}