What's wrong with the following programs?

/*********************************************************************************
This progam is design to let the user know a lottery number and that person name.
**********************************************************************************/

#include<iostream>
#include<string>
using namespace std;

void main()
{
	string Username;
	int num;

	cout<<"What are your lottery number?"<<endl;
	cin>>num;
	cin>>Username;
	cout<<"They are "<<num<<"."<<endl;
}

/***Try to compile, link and run it.  If you are a user, can you know what to do without looking the codes?  
Missing the USER & PROGRAMMER INTERFACE.   ****/

#include<iostream>
#include<string>
#include<iomanip>
using namespace std;

void main()
{
	int A,B,C,D,E,F,sum,product;

	cout<<"enter two numbers"<<endl;
	cin>>A>>B;
	cout<<"enter two numbers"<<endl;
	cin>>C>>D;
	cout<<"enter two numbers"<<endl;
	cin>>E>>F;
	sum=A+B;
    	product=A*B;
	cout<<setw(10)<<"number1"<<setw(10)<<"number2"<<setw(15)<<"sum"<<setw(15)<<"product"<<endl;
    cout<<setw(10)<<A<<setw(10)<<B<<setw(15)<<sum<<setw(15)<<product<<endl;
    cout<<setw(10)<<C<<setw(10)<<D<<setw(15)<<sum<<setw(15)<<product<<endl;
    cout<<setw(10)<<E<<setw(10)<<F<<setw(15)<<sum<<setw(15)<<product<<endl;
}

  Are all of them correct?

#include <iostream>
#include <iomanip>
using namespace std;

void main()
{
	int n1, n2, n3, n4, n5, n6;
	cout<<" Please enter two numbers. "<<endl;
	cin>>n1>>n2;
	cout<<" Please enter two numbers. "<<endl;
	cin>>n3>>n4;
        cout<<" Please enter two numbers. "<<endl;
	cin>>n5>>n6;

	cout<<"Num1"<<setw(10)<<"Num2" <<setw(10)<<"Sum"<<setw(10)<<"Product"<<endl;
	cout<< n1 <<setw(10)<< n2 <<setw(11)<< n1+n2 <<setw(10)<< n1*n2 <<endl;
	cout<< n3 <<setw(10)<< n4 <<setw(11)<< n3+n4 <<setw(10)<< n3*n4 <<endl;
	cout<< n5 <<setw(10)<< n6 <<setw(11)<< n5+n6 <<setw(10)<< n5*n6 <<endl;
}
  Are they lined up well?  Why not?