#include <iostream>

int readNumber()
{

    using namespace std;
    int x=0;
    cout << "please input an intger: ";
    cin >> x;
    return x;

}

int addnumber()
{
    int sum;
    int i = readNumber();
    int j = readNumber();
    sum = i + j ;
    return sum;

}

void writeAnswer()
{
    using namespace std;
    //"This is the answer: "<<
    cout <<  addnumber() << endl;

}

int main()
{
    //addnumber();
    writeAnswer();
    return 0;

}