can sum1 explain exactly how this program calculates the number of bits required to store a number(i got it off a tutorial and its aint explainin)
Code:
#include <iostream>
using namespace std;
int main()
{
int bitsRequired = 1;
int largest = 1;
int powerOf2 = 2;
int number;
cout << "Enter a positive integer: ";
cin >> number;
while (number > largest)
{
bitsRequired += 1;
powerOf2 = powerOf2 * 2;
largest = powerOf2 - 1;
}
cout << "To store " << number << " requires ";
cout << bitsRequired << " bits" << endl;
cin.ignore();
cin.get();
return 0;
}
thankz in advance