Hex omregning??????

Kode 

#include <iostream>
int main()
{
   float x;
   *(unsigned int *)&x = 0x4144CCCC;
   std::cout << x << std::endl;
   *(unsigned int *)&x = 0x40A00000;
   std::cout << x << std::endl;
}

Kode 

#include <iostream>
#include <cmath>
using namespace std;

double ToDouble(unsigned int tal)
{
   int Sign = tal & 0x80000000U ? -1 : 1;
   int E = (tal & 0x7F800000) >> 23;
   unsigned int F = tal & 0x7FFFFF;
   return Sign*(1.0 + double(F)/0x7FFFFF)*pow(2.0, E - 127);
}

int main()
{
   cout << ToDouble(0x4144CCCC) << endl;
   cout << ToDouble(0x40A00000) << endl;
}