Pointer Discrepancy between vc++ & g++

  1 #include 
  2
  3 using namespace std;
  4
  5 int main()
  6 {
  7         int a = 1, b = 2;
  8         int *x;
  9
 10         cout << "x: " << x << '\t';
 11         cout << "*x: " << *x << '\t';
 12         cout << "&x: " << &x << '\t';
 13
 14         cout << endl;
 15
 16         x = &a;
 17         cout << "x = &a" << '\t';
 18         cout << "x: " << x << '\t';
 19         cout << "*x: " << *x << '\t';
 20         cout << "&x: " << &x << '\t';
 21
 22         cout << endl;
 23
 24         x = &a - 1;
 25         cout << "x = &b" << '\t';
 26         cout << "x: " << x << '\t';
 27         cout << "*x: " << *x << '\t';
 28         cout << "&x: " << &x << '\t';
 29
 30         cout << endl;
 31         return 0;
 32 }

Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 (VC6++)

modified code...

x = &a  x: 0012FF7C     *x: 1   &x: 0012FF74
x = &a-1  x: 0012FF78     *x: 2   &x: 0012FF74

g++ (GCC) 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)

x: 0xb7f518dc   *x: -1  &x: 0xbf97f214
x = &a  x: 0xbf97f218   *x: 1   &x: 0xbf97f214
x = &a-1  x: 0xbf97f214   *x: -1080561132 &x: 0xbf97f214

g++ 讓我驚訝！！ 結果 VC++ 2005 Expression 也讓我受精。 XD

Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.762 for 80x86

x = &a  x: 0012FF60     *x: 1   &x: 0012FF48
x = &a-1  x: 0012FF5C     *x: -858993460  &x: 0012FF48