Cours:PointeursCpp

Analyse de code

Simuler le fonctionnement de ce programme :

int main()
{
  int n1=10;
  int *n2=nullptr;
  int n3=20;
  int *n4=nullptr;

  cout << &n1 << " " << n2 << " " << &n3 << " " << n4 << endl;
  cout << n1 << " " << *n2 << " " << n3 << " " << *n4 << endl;  // crash du programme

  n2 = &n1;
  n4 = n2;
 
  cout << &n1 << " " << n2 << " " << &n3 << " " << n4 << endl;
  cout << n1 << " " << *n2 << " " << n3 << " " << *n4 << endl;

  n1 = 30;
  *n2 = 40;
  n4 = &n3;
  n3 = 5;

  cout << &n1 << " " << n2 << " " << &n3 << " " << n4 << endl;
  cout << n1 << " " << *n2 << " " << n3 << " " << *n4 << endl;

  return 0;
}