Addition of two numbers in C++

For adding two numbers in c++,we have to declare variables.
We can accept numbers from user also using "cin" function or we can do it by declaring numbers to variables.
we will see both the methods.

#include<conio.h>

#include<iostream.h>

void main()
{
          int x=2,y=2,z;   

 /*here variables are of integer type which stores two bytes ,you can take it as float (decimal values) */

          z=x+y;  

          cout<<"\nX:"<<x<<"\nY:"<<y<<"Answer: "<<z;

         /*accepting from user*/
      cout<<"Enter two numbers: ";
        cin>>x>>y;

        z=x+y;

         cout<<"\nX:"<<x<<"\nY:"<<y<<"Answer: "<<z;

 getch();
}

Output: