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/Prog1/examples/ch05/Fig05_26.cpp | 76 +++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 Bachelor/Prog1/examples/ch05/Fig05_26.cpp (limited to 'Bachelor/Prog1/examples/ch05/Fig05_26.cpp') diff --git a/Bachelor/Prog1/examples/ch05/Fig05_26.cpp b/Bachelor/Prog1/examples/ch05/Fig05_26.cpp new file mode 100644 index 0000000..916dbb9 --- /dev/null +++ b/Bachelor/Prog1/examples/ch05/Fig05_26.cpp @@ -0,0 +1,76 @@ +// Fig. 5.26: fig05_26.cpp +// Demonstrating an array of pointers to functions. +#include + +using std::cout; +using std::cin; +using std::endl; + +// function prototypes +void function1( int ); +void function2( int ); +void function3( int ); + +int main() +{ + // initialize array of 3 pointers to functions that each + // take an int argument and return void + void (*f[ 3 ])( int ) = { function1, function2, function3 }; + + int choice; + + cout << "Enter a number between 0 and 2, 3 to end: "; + cin >> choice; + + // process user's choice + while ( choice >= 0 && choice < 3 ) { + + // invoke function at location choice in array f + // and pass choice as an argument + (*f[ choice ])( choice ); + + cout << "Enter a number between 0 and 2, 3 to end: "; + cin >> choice; + } + + cout << "Program execution completed." << endl; + + return 0; // indicates successful termination + +} // end main + +void function1( int a ) +{ + cout << "You entered " << a + << " so function1 was called\n\n"; + +} // end function1 + +void function2( int b ) +{ + cout << "You entered " << b + << " so function2 was called\n\n"; + +} // end function2 + +void function3( int c ) +{ + cout << "You entered " << c + << " so function3 was called\n\n"; + +} // end function3 + +/************************************************************************** + * (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