2's compliment of decimal number to binary number program in c++

#include <iostream>

using namespace std;

int main()

{

    int n,i,x;

    cout<<" Please, Enter a Number : ";

    cin>>n;

    cout<<"\n The binary equivalent of the number : \n ";

    for(i=3; i>=0; i--)

    {

        x=n&(1<<i);

        if(x==0)

            cout<<"0";

        else

            cout<<"1";

    }

    n=~n;

    n=n+1;

    cout<<"\n The 2's complement of the number :\n ";

    for(i=3; i>=0; i--)

    {

        x=n&(1<<i);

        if(x==0)

            cout<<"0";

        else

            cout<<"1";

    }

    return 0;

}

***************""**"**

Algorithm step1 start

Step2 for(i=3; i>=0; i--) {

  x=n&(1<<i);

       if(x==0)

        cout<<"0";

  else

      cout<<"1"; }

  n=~n;

  n=n+1;

Step3 stop