练习24

#include <iostream>
using namespace std;
int x = 5, y = 7; 
void myFunction()
{
    int y = 10;


    cout << "x from myFunction: " << x << "\n";
    cout << "y from myFunction: " << y << "\n\n";
}
int main()
{


    cout << "x from main: " << x << "\n";
    cout << "y from main: " << y << "\n\n";
    myFunction();
    cout << "Back from myFunction!\n\n";
    cout << "x from main: " << x << "\n";
    cout << "y from main: " << y << "\n";
    return 0;
}