int& question

[tygerrock]

I'm not sure if I understand this properly and can't find it anywhere.

  void cat (int a, int b, int& c)
int main ()
{
int w = 1; 
int x = 2; 
int y = 3; 
int z = 4; 

cat (w, x, y); 
}

void cat(int a, int b, int& c)
{
a += 2;
c= a+b;
}

Does that make w=3, x=2, y=5 and z=4?

[Smac89]

This is called pass-by-reference and it is the same as if you had done this:

void cat (int a, int b, int* c)
int main () {
    int w = 1, x = 2, y = 3, z = 4; 
    cat (w, x, &y); 
    return 0;
}

void cat(int a, int b, int* c) {
    a += 2;
    *c = a + b;
}

In both cases,
w = 1, x = 2, y = 5, z = 4