Binary to Decimal

#include<stdio.h>
int main()
{
    long long int i,n,dec=0,rem;
    printf("Enter any binary number: ");
    scanf("%lld",&n);

    for(i=0;n!=0;++i)
    {
        rem=n%10;
        dec=(rem)*(pow(2,i))+dec;
        n=n/10;
    }

    printf("Decimal number = %lld",dec);

    return 0;
}