Ej1C++

#include <cstdlib>
#include <iostream>

using namespace std;

void inc (int& val);

int main (void) {

    int i;

    i = 0;

    cout << "Antes: " << i << endl;

    inc(i);

    cout << "Despues: " << i << endl;

    return EXIT_SUCCESS;
}

void inc (int& val) {
    ++val;
}