C++ Program to Convert Binary into Decimal Number

#include<iostream>
#include<math.h>
#include<process.h>
using namespace std;
int main()
  {
  int a[10],i,no,sum=0,rem,j,k=0;

  cout<<"Enter Binary No:\n";
  cin>>no;
  i=0;
  while(no>0)
  {
  a[i]=no%10;
  no=no/10;
  i++;
  }
  for(j=0;j<i;j++)
  {
      sum=sum+a[j]*pow(2,k);
      k++;
  }
  cout<<"Decimal NO:"<<sum<<"\n";
      system ("pause");
    return 0;
}

C++ Program to Convert Binary into Decimal Number