ошибка pow overflow error

pow(2.0, i)

# include <iostream.h>
# include <math.h>
float t(float p)
{ return sin(p)/cos(p);
}
void main()
{ float l1,l,p;
  int i;
  const pi=3.14;
  const eps=1E-3;
   p=pi/8;
   l1=pow(t(p),t(2*p));
   i=1;
  do
 { i=i+1;
   l=l1;
   p=p+p/pow(2.0,i);
   l1=pow(t(p),t(2*p));
 }
  while (abs(l1-l)<=eps);
 cout <<"\n lim=" << l1;
}

#include <iostream>
#include <cmath>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <string>
#include <cstdlib>
#include <vector>
#include <map>
#include <stack>
#include <set>
#include <list>
#include <iomanip>
#include <functional>
#include <sstream>
#include <fstream>
using namespace std;
#define pow(x,n) pow(1.0*(x),n)
#define ll long long
 
double t(double p) {
    return sin(p) / cos(p);
}
#define EPS            (double)1e-9
#define PI 3.14159265358979
 
inline ll binpow(ll x, ll n) {
    ll res = 1;
    while (n) {
        if (n & 1)res *= x;
        x *= x;
        n >>= 1;
    }
    return res;
}
 
int main() {
    double l1, l, p;
    int i;
    p = PI / 8;
    l1 = pow(t(p), t(2 * p));
    i = 1;
    do {
        i = i + 1;
        l = l1;
        p = p + p / pow(2.0, i);
        l1 = pow(t(p), t(2 * p));
    } while (fabs(l1 - l) <= EPS);
    cout << "lim= " << l1<<endl;
 
    return 0;
}

#define _USE_MATH_DEFINES
#include <iostream>
#include <cmath>
 
double f( double p )
{
    return std::pow( std::tan(p), std::tan(2*p) );
}
 
void main()
{ 
    const double eps=1E-3;
    double p= M_PI/8;
    double l1 = f(p);
 
    int i=1;
    double l;
    do
    { 
        l = l1;
        p += p/std::pow(2.,++i);
        l1 = f(p);
    }
    while (std::abs(l1-l)<=eps);
    std::cout <<"\n lim=" << l1;
}