ParamPassing.txt

int g = 0;
int a[5] = { -9, -1, -6, 4, 10 };

void foo(int r, int s){
  s = r;
  g = 3;
  r = a[g];
  a[g] = a[2];
}

int main() {
  int g = 2;
  foo(g, a[g]);
}