using result of a program

[vuonganh1993]

Hi every.
I have a question. I have 2 different programs. I want to use the result of the first program in the second program. Can anyone show me one example about this. thank you!

[aidyszh]

Nobody can help you according to your such general description i think.

[vuonganh1993]

I have:

file1.cpp
#include<iostream>
using namespace std;
int main()
{
        int x;
        cin>>x;
        return 0;
}

file2.cpp
#include<iostream>
using namespace std;
int main()
{
        int y;
       .....
        return 0;
}

I want y=x. What must I do?