C & C++ Multimedia Cyber Classroom/C and C++ Multimedia Cyber Classroom (Prentice Hall) (1998).iso/cpphtp2/code.jar/code/ch21/fig21_04.txt

Text File | 1998-02-27 | 831b | 28 lines

1   // Fig. 21.4: fig21_04.cpp
2   // Demonstrating reinterpret_cast operator.
3   #include <iostream.h>
4
5   int main()
6   {
7      unsigned x = 22, *unsignedPtr;
8      void *voidPtr = &x;
9      char *charPtr = "C++";
10
11     // cast from void * to unsigned *
12     unsignedPtr = reinterpret_cast< unsigned * >( voidPtr );
13
14     cout << "*unsignedPtr is " << *unsignedPtr
15          << "\ncharPtr is " << charPtr;
16
17     // use reinterpret_cast to cast a char * pointer to unsigned
18     cout << "\nchar * to unsigned results in: "
19          << ( x = reinterpret_cast< unsigned >( charPtr ) );
20
21     // cast unsigned back to char *
22     cout << "\nunsigned to char * results in: "
23          << reinterpret_cast< char * >( x ) << endl;
24
25     return 0;
26  }
}