My first C++ program

I wrote this program for example ....

#include "stdafx.h"
#include <>

using namespace std;

int main()
{
int a,b;
cout < <"Type two number:";
cin > > a > > b;
cout < <"\nsum :"< < a+b < < "\n";
cout < <"different :"< < a-b < < "\n";
system("pause");
return 0;
}