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 --- .../Prog1/examples/ch07/Fig07_17_19/Fig07_19.cpp | 55 ++++++++++++++ .../Prog1/examples/ch07/Fig07_17_19/employee2.cpp | 88 ++++++++++++++++++++++ .../Prog1/examples/ch07/Fig07_17_19/employee2.h | 41 ++++++++++ 3 files changed, 184 insertions(+) create mode 100644 Bachelor/Prog1/examples/ch07/Fig07_17_19/Fig07_19.cpp create mode 100644 Bachelor/Prog1/examples/ch07/Fig07_17_19/employee2.cpp create mode 100644 Bachelor/Prog1/examples/ch07/Fig07_17_19/employee2.h (limited to 'Bachelor/Prog1/examples/ch07/Fig07_17_19') diff --git a/Bachelor/Prog1/examples/ch07/Fig07_17_19/Fig07_19.cpp b/Bachelor/Prog1/examples/ch07/Fig07_17_19/Fig07_19.cpp new file mode 100644 index 0000000..27ba9f7 --- /dev/null +++ b/Bachelor/Prog1/examples/ch07/Fig07_17_19/Fig07_19.cpp @@ -0,0 +1,55 @@ +// Fig. 7.19: fig07_19.cpp +// Driver to test class Employee. +#include + +using std::cout; +using std::endl; + +#include // C++ standard new operator + +#include "employee2.h" // Employee class definition + +int main() +{ + cout << "Number of employees before instantiation is " + << Employee::getCount() << endl; // use class name + + Employee *e1Ptr = new Employee( "Susan", "Baker" ); + Employee *e2Ptr = new Employee( "Robert", "Jones" ); + + cout << "Number of employees after instantiation is " + << e1Ptr->getCount(); + + cout << "\n\nEmployee 1: " + << e1Ptr->getFirstName() + << " " << e1Ptr->getLastName() + << "\nEmployee 2: " + << e2Ptr->getFirstName() + << " " << e2Ptr->getLastName() << "\n\n"; + + delete e1Ptr; // recapture memory + e1Ptr = 0; // disconnect pointer from free-store space + delete e2Ptr; // recapture memory + e2Ptr = 0; // disconnect pointer from free-store space + + cout << "Number of employees after deletion is " + << Employee::getCount() << endl; + + 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. * + *************************************************************************/ diff --git a/Bachelor/Prog1/examples/ch07/Fig07_17_19/employee2.cpp b/Bachelor/Prog1/examples/ch07/Fig07_17_19/employee2.cpp new file mode 100644 index 0000000..540f367 --- /dev/null +++ b/Bachelor/Prog1/examples/ch07/Fig07_17_19/employee2.cpp @@ -0,0 +1,88 @@ +// Fig. 7.18: employee2.cpp +// Member-function definitions for class Employee. +#include + +using std::cout; +using std::endl; + +#include // C++ standard new operator +#include // strcpy and strlen prototypes + +#include "employee2.h" // Employee class definition + +// define and initialize static data member +int Employee::count = 0; + +// define static member function that returns number of +// Employee objects instantiated +int Employee::getCount() +{ + return count; + +} // end static function getCount + +// constructor dynamically allocates space for +// first and last name and uses strcpy to copy +// first and last names into the object +Employee::Employee( const char *first, const char *last ) +{ + firstName = new char[ strlen( first ) + 1 ]; + strcpy( firstName, first ); + + lastName = new char[ strlen( last ) + 1 ]; + strcpy( lastName, last ); + + ++count; // increment static count of employees + + cout << "Employee constructor for " << firstName + << ' ' << lastName << " called." << endl; + +} // end Employee constructor + +// destructor deallocates dynamically allocated memory +Employee::~Employee() +{ + cout << "~Employee() called for " << firstName + << ' ' << lastName << endl; + + delete [] firstName; // recapture memory + delete [] lastName; // recapture memory + + --count; // decrement static count of employees + +} // end ~Employee destructor + +// return first name of employee +const char *Employee::getFirstName() const +{ + // const before return type prevents client from modifying + // private data; client should copy returned string before + // destructor deletes storage to prevent undefined pointer + return firstName; + +} // end function getFirstName + +// return last name of employee +const char *Employee::getLastName() const +{ + // const before return type prevents client from modifying + // private data; client should copy returned string before + // destructor deletes storage to prevent undefined pointer + return lastName; + +} // end function getLastName + +/************************************************************************** + * (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. * + *************************************************************************/ diff --git a/Bachelor/Prog1/examples/ch07/Fig07_17_19/employee2.h b/Bachelor/Prog1/examples/ch07/Fig07_17_19/employee2.h new file mode 100644 index 0000000..3010210 --- /dev/null +++ b/Bachelor/Prog1/examples/ch07/Fig07_17_19/employee2.h @@ -0,0 +1,41 @@ +// Fig. 7.17: employee2.h +// Employee class definition. +#ifndef EMPLOYEE2_H +#define EMPLOYEE2_H + +class Employee { + +public: + Employee( const char *, const char * ); // constructor + ~Employee(); // destructor + const char *getFirstName() const; // return first name + const char *getLastName() const; // return last name + + // static member function + static int getCount(); // return # objects instantiated + +private: + char *firstName; + char *lastName; + + // static data member + static int count; // number of objects instantiated + +}; // end class Employee + +#endif + +/************************************************************************** + * (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