C++ program to convert Binary to Decimal

#include <iostream>
using namespace std;

int main() {
int sumStore=0,base=1,bin,num,num1,rem;

cout<<"Enter a binary number : ";
cin>>num;
bin=num;
num1=num;

  //Loop to check the number is binary or not
while(num!=0)
   {

if((num%10!=0 )&& (num%10!=1))
     {
      cout<<"The number "<<bin<<" is not binary\n";
      return 0;
     }

      num=num/10;

    }
    //if number is binary then this loop will execute
   while(num1!=0)
    {
      rem=num1%10;
      sumStore=sumStore+(rem*base);
      base=base*2;
      num1=num1/10;

    }
   cout<<"\nThe decimal Equivalent of binary No "<<bin<<" is = "<<sumStore<<endl;


return 0;
}