conversionofbinarytodecimal.cpp

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    int n;
    cout << "Enter the value of n: " << endl;
    cin >> n;
    int answer = 0;
    int i = 0;
    while (n != 0) {
        int digit=n%10;
        if(digit==1){
            answer = answer+ pow(2,1);

        }
        n=n/10;
        i++;
}
cout<<"answer is:"<<answer<<endl;
}