Due to the fact the float
and double
are internally stored in binary, the literal 7.40200133400
actually stands for the number 7.40200133400000037653398976544849574565887451171875
…so how much precision do you really want? 🙂
#include <iomanip>
int main()
{
double x = 7.40200133400;
std::cout << std::setprecision(51) << x << "\n";
}
And yes, this program really prints 7.40200133400000037653398976544849574565887451171875!