function pointers

/*
        C++
*/


#include <iostream>
using namespace std;

void changeInt(int *v, int newVal){
    /*
        Change int with a function, using pointers.
    */

    *v = newVal;
}

int main() {
    /*
    First:
    int x, declared with 0 value
    pointer to x

    we see the x value
    we change the x value to 10
    we see the new x value
    */
    int x = 0;
    int *p = &x;

    cout << x << endl;

    changeInt(p, 10);

    cout << x << endl;
}