C/math.h/ldexp
ldexp: returns the value of num * 2^exp
//Header file: #include <math.h>
//Declaration: float ldexpf(float num, int exp);
double ldexp(double num, int exp);
long double ldexpl(long double num, int exp);
#include <math.h>
#include <stdio.h>
int main(void)
{
printf("%f", ldexp(1,2));
return 0;
}
/*
4.000000*/