Log Switcher. Read in a number (double). Print the power of two that the number represents.

Question

Read in a number (double). Print the power of two that the number represents.

C++11 added a log base 2 function, but you can also just use the formula: power = log(number) / log(2) where log is the natural logarithm function.

Code:

#include <iostream>

Don't forget the math library!!!

using namespace std;

int main()

{

//YOUR_CODE

}

Answer 1

using namespace std;

#include <iostream>

#include <math.h>

int main()

{

double x=-1;

while (x<=0)

{

cout << "Please input the decimal number of which to find the Log :>";

cin >> x;

}

cout << "Log (base 2) of " << x << " is " << log(x)/log(2) << endl;

}