double and long double

[clover leaf]

Whats the difference between double and long double?

[m4ster r0shi]

Size:

#include <iostream>
using namespace std;

int main()
{
    cout << "sizeof(double)=" << sizeof(double) << endl;
    cout << "sizeof(long double)=" << sizeof(long double) << endl;

    cin.get();
    return 0;
}

And precision: http://en.wikipedia.org/wiki/Long_double

[clover leaf]

Thanks!