From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001 From: Sven Eisenhauer Date: Fri, 10 Nov 2023 15:11:48 +0100 Subject: add new repo --- Bachelor/Prog2/Codebeispiele/3_ch15/FIG15_09.CPP | 57 ++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 Bachelor/Prog2/Codebeispiele/3_ch15/FIG15_09.CPP (limited to 'Bachelor/Prog2/Codebeispiele/3_ch15/FIG15_09.CPP') diff --git a/Bachelor/Prog2/Codebeispiele/3_ch15/FIG15_09.CPP b/Bachelor/Prog2/Codebeispiele/3_ch15/FIG15_09.CPP new file mode 100644 index 0000000..d94ff92 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/3_ch15/FIG15_09.CPP @@ -0,0 +1,57 @@ +// Fig. 16.9: fig16_09.cpp +// Converting to C-style strings. +#include + +using std::cout; +using std::endl; + +#include + +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. * + *************************************************************************/ -- cgit v1.2.3