How to read a binary number as input?

Question

Is there a way for the user to input a binary number in C or C++?

If we write something like

int a = 0b1010;
std::cout << a << std::endl
         


        

Answer 1

While there is no function to read binary numbers directly, there are functions, strtox (where x represents the data type) to convert a string containing a binary number (or a number of any other base) to a numeric value.

So the solution is to first read the number as a string and then convert it.

Example:

char input[100];
char *endpointer;



int n = (int) strtol(input, &endpointer, 2);