C++ Programs to convert Binary number to Decimal number

#include<iostream>

using namespace std;

int main()

{

    int num,temp,reminder,sum=0,i=1;

    cout<<"Enter the binary number\n";

    cin>>num;

    temp=num;

    while(temp!=0)

    {

        reminder = temp%10;

        sum=sum+reminder*i;

        temp=temp/10;

        i=i*2;

    }

    cout<<"\nDecimal number= "<<sum;

}