#include <cmath>

double ldexp (double x, int n) 

Liefert $x\cdot 2^n$.

Rückgabewert: x * pow(2, n).

frexp().

ldexp.cpp

#include <cmath>
#include <iostream>
 
int main()
{
  std::cout << "6 = " << std::ldexp(1.5, 2) << '\n';
}