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// Fig. 16.9: fig16_09.cpp
// Converting to C-style strings.
#include <iostream>
using std::cout;
using std::endl;
#include <string>
using std::string;
int main()
{
string string1( "STRINGS" );
const char *ptr1 = 0;
int length = string1.length();
char *ptr2 = new char[ length + 1 ]; // including null
// copy characters from string1 into allocated memory
string1.copy( ptr2, length, 0 );
ptr2[ length ] = '\0'; // add null terminator
// output
cout << "string s is " << string1
<< "\nstring1 converted to a C-Style string is "
<< string1.c_str() << "\nptr1 is ";
// Assign to pointer ptr1 the const char * returned by
// function data(). NOTE: this is a potentially dangerous
// assignment. If string1 is modified, pointer ptr1 can
// become invalid.
ptr1 = string1.data();
// output each character using pointer
for ( int i = 0; i < length; i++ )
cout << *( ptr1 + i ); // use pointer arithmetic
cout << "\nptr2 is " << ptr2 << endl;
delete [] ptr2;
return 0;
} // end main
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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