C++ code - 7 lines

Link:

C++, pasted on Jul 31:

int main()
{
  int *p=NULL;
   void * p1=NULL;
   p = p1;
  return 0;
}

Output:

1
2
3

In function 'int main()':
Line 5: error: invalid conversion from 'void*' to 'int*'
compilation terminated due to -Wfatal-errors.