C++ reads in binary Numbers and converts them to decimal output

Topic describes

Given a binary number containing only 0 and 1 with a length not greater than 10, convert it to decimal and output it.

The input describing

Enter a binary integer n with a length not greater than 10

Output description

Output converted decimal number on one line

The sample input

110

Sample output

6

Solution:

Many people who have studied C and are just beginning to learn C++ may think of reading in a character array and then counting bits and bits into a decimal output.

There is no need.

The C++ class library provides a binary data class and its methods can be converted to decimal.

The code is as follows:

#include <iostream>

using namespace std;

#include <bitset>

int main()

{

    bitset<16> bint;  //16 bits of binary data, and bitset<32> < br / >
    cin >> bint;

    cout << bint.to_ulong() << endl;

    return 0;

}