15. C/C++ memory access demo v.1

• 
  #include <iostream>
  using namespace std;
  
  int main()
  {
      // Each time our program executes, it can be loaded into a
      // different physical memory. Yet we want to apply addresses
      // from the beginning of memory. The MEMORY variable represents
      // the beginning of memory at location zero:
      int MEMORY = 0;
  
      // "HELLO" is stored in memory as a sequence of bytes.
      // To keep track of that sequence of bytes, compiler
      // uses memory location of the first byte:
      int location = int( "HELLO" );
      cout << "The location is " << location << '\n';
  
      for(;;) {
          cout << "Enter new location: ";
          cin >> location;
  
          // Show character at the specified location:
          cout << MEMORY[ (char*)location ] << "\n";
  
          // (char*) means "get a character from the specified location"
          // We need (char*) because otherwise compiler doesn't know what
          // type of object to retrieve from memory.
      }
      return 0;
  }